01 / SCANSkip the retyping.
Skip the retyping.
Start with a photo.
Photograph your question in Lirno, or type it in. Include the instruction, symbols and diagram so you can discuss the task you actually need to solve.
Meet Lirno · Your AI homework helper
Homework.
Now it makes sense.
Stuck on a question? Scan or type it into Lirno. Get step-by-step help for math, science and English, then turn what you learn into practice.
iPhone & iPad · Free to download
- Bring your question.Scan or type your homework
- Understand the why.Ask, explain and check
- Make the idea stick.Practice beyond the answer
One app for your study routine
Your question.
A way forward.
Lirno brings a homework scanner, AI tutoring and study practice together on your iPhone or iPad. Start with the assignment in front of you, ask about the step that feels unclear and keep working from there.
From a handwritten equation to an English paragraph, you can bring your own attempt into the conversation. Ask for one hint, a fuller explanation or feedback on your reasoning.
Ask the follow-up.
“Why this formula?” “Where did that number come from?” Ask Lirno about the connection you missed, or request one hint before trying the next step yourself.
Make it stick.
Use Lirno’s flashcards and quizzes to return to the topic later. Try an answer from memory, check the reasoning and find what needs another pass.
Start with your next homework question.
Open Lirno, add a photo or type your question, and say where you got stuck.
Get Lirno for iOS
Free to download
Homework help from a photo
Less retyping.
More understanding.
A worksheet, a handwritten question or a diagram: give the tutor the context before asking for the answer.
With Lirno, you can photograph homework or type a question. Keep the instruction in the frame, together with the complete equation, graph or passage. A small detail, such as a minus sign or a label on an axis, can change what the task means.
After scanning, check the question the tutor is working with. Then say what you need: help getting started, an explanation of one step or feedback on an attempt. You do not have to begin with a blank screen or describe a whole page from memory.
For example, 6/(x + 2) = 3 is a different task from 6/x + 2 = 3. In the first, the whole denominator is x + 2 and x = 0 works; in the second, x = 6 works. Keeping the fraction bar and grouping clear lets you spend the conversation on the intended equation.
Homework Missions
A whole worksheet.
One first move.
Find the task inside the task.
“Finish the worksheet” can hide several different jobs: read a graph, choose a relationship, calculate a value and explain what it means. Lirno’s Homework Missions help turn an assignment into smaller learning steps. Start with the part that makes the rest possible.
For a graph question, first name the axes. A cumulative-distance segment from 12 m at 4 s to 42 m at 10 s covers 30 m in 6 s, so its speed is 5 m/s. Dividing 42 by 10 would use a different interval. The mission is to make each decision visible, not just to produce the final number.
Use a mission to keep the original assignment in view while working on one decision at a time. After a hint, make the move yourself. After an explanation, check that you can say why it applies. Leave a short review question for the idea you want to remember.
See how a mission fits your homework →
EXAMPLE / A GRAPH QUESTIONBuild the answer.
Piece by piece.
- 01Read
Name the quantities and units on both axes.
- 02Choose
Connect distance and elapsed time.
- 03Calculate
Use (42 − 12) m ÷ (10 − 4) s to find 5 m/s.
- 04Explain
The straight segment represents constant speed during these 6 seconds.
A prepared learning route, with a reason for every step.
Help at the right depth
You choose
how much help.
Sometimes you want a nudge. Sometimes the entire concept is new. Tell Lirno what you already know so the response starts where your thinking stops.
Give me a hint.
Ask for a clue that points to the next decision. For an equation, that might mean identifying the operation to undo first. Pause there and try the move yourself before requesting more.
A useful hint leaves you something to do. Specify “one hint, without the final answer” if you want to preserve the challenge.
Explain the idea.
Ask why the method applies, what a term means or how two steps connect. Mention your course level and request a smaller example if the explanation jumps ahead.
Follow with a question about the part that still feels unclear. A short, focused conversation can be easier to use than a long response.
Check my attempt.
Share your working and ask for the first step that needs attention. Keep the valid parts, correct the error and explain the change in your own words.
For 2(x + 4) = 18, a line of 2x + 4 = 18 reveals the first error: the factor 2 missed the second term. Correcting that move gives 2x + 8 = 18 and x = 5. A check can preserve the rest of your work while locating the transition to repair.
Try the thinking
See what a clearer
explanation looks like.
These prepared examples show how a question becomes a method you can inspect. Choose a subject and follow the reasoning. For help with your own assignment, open Lirno.
Math word problem help · WORKED EXAMPLE
A taxi charges $4 to start and $2 for each mile. The fare is $18. How many miles were traveled?
ANSWER7 miles
Prepared example for learning.
Explore word problems →- 1
Define the unknown
Let m be the number of miles traveled.
- 2
Build the model
The fixed charge plus the distance charge gives 4 + 2m = 18.
- 3
Solve the equation
Subtract 4: 2m = 14. Divide by 2: m = 7.
- 4
Return to the story
A 7-mile trip costs $4 + $14 = $18 under the stated pricing model.
Physics homework help · WORKED EXAMPLE
A cyclist travels 150 m in 30 s. What is the average speed?
ANSWER5 m/s
Prepared example for learning.
Explore physics →- 1
Identify the quantities
Distance traveled is 150 m. Elapsed time is 30 s.
- 2
Select the definition
Average speed = total distance ÷ elapsed time.
- 3
Calculate with units
150 m ÷ 30 s = 5 m/s.
- 4
Interpret the answer
The cyclist covers an average of 5 meters per second across the trip. This does not tell us the speed at every instant.
English homework help · WORKED EXAMPLE
Original miniature text: “The house waited beyond the gate. Mira gripped the key but did not move.” How does this passage create tension?
ANSWERPossible access, delayed action
Prepared example for learning.
Explore english & writing →- 1
Make a focused claim
The passage creates tension between being able to enter and hesitating to do so.
- 2
Choose the contrasting details
“Gripped the key” suggests access and readiness; “did not move” delays action.
- 3
Explain a language choice
The house that “waited” is personified. In this reading, it makes entry feel expected and Mira’s pause more noticeable.
- 4
Respect the evidence
This is one supported interpretation of an original teaching passage. The two sentences do not establish a specific reason for Mira’s hesitation.
The useful part is the connection between the steps. Try predicting the next move before reading it. Then change one number or condition and see whether the same method still applies. That is a stronger check than recognizing a finished answer.
Now bring your own question.
These are prepared examples. For a conversation about your homework, open Lirno and share the task and your attempt.
Help for the whole timetable
Different subjects.
Same clear next step.
Math needs a valid transformation. Science needs a model and an explanation. English needs an argument supported by the text. The right kind of homework help changes with the assignment.
Explore a subject guide for an example, practical checks and a request you can adapt in Lirno.
Algebra homework help
Algebra
Solve linear equations, handle brackets and fractions, and check a solution against a graph.
Explore the guide
Physics homework help
Physics
Distinguish speed from velocity, read graph intervals and calculate with net force and units.
Explore the guide
English homework help
English & writing
Use an original short passage to build a claim, select evidence and explain its effect.
Explore the guideMath homework helper
Understand the move.
Then own the method.
From the first equation to the final check, keep the reason for each step in view.
For 6x + 5 = 2x + 21, subtract 2x, then subtract 5, then divide by 4: x = 4. Substitution gives 29 on each side. The operations preserve equality; the final check reaches back to the original equation.
Lirno can explain a solution step by step and answer follow-up questions. Include the method your class expects, especially when several approaches are possible. If you have already started, show that work rather than replacing it with a completely new solution.
A geometry check asks a different question: in a right triangle with hypotenuse 13 cm and leg 5 cm, the other leg is 12 cm because 13² − 5² = 144. The hypotenuse remains longest. In a fare model, put the proposed number of hours back into the pricing rule. Match the check to the task.
Science homework help
Go beyond
the formula.
A calculation becomes useful when you can say what it describes.
A round trip can have a nonzero average speed and zero average velocity. Travelling 100 m out and 100 m back in 50 s gives 4 m/s average speed, but zero average velocity because the final displacement is zero. Naming the quantity changes which information the calculation uses.
Bring graphs, labels and units into the tutoring conversation. Ask Lirno to distinguish the observation from the explanation, or to identify the assumption behind a calculation. When a term is confusing, request a definition in the context of this particular question.
In chemistry, 0.12 mol in 0.400 L of final solution gives 0.30 mol/L. In biology, a mass increase is an observation; an osmosis explanation also needs the membrane and solution conditions. Each guide distinguishes the numerical result or observed pattern from the model explaining it.
Lesson Studio
Give a difficult idea
room to click.
Some topics need more than a reply. Use Lirno’s Lesson Studio to revisit a concept through a guided explanation, visual relationships and practice.
Choose one learning goal, such as connecting a fraction, decimal and percentage. Use the same whole and equal-part model across the explanation. Then hide it and reconstruct a new share from a different starting representation.
Name the relationship.
Three of four equal parts represent 3/4 of the whole. Dividing 3 by 4 gives 0.75; written per hundred, the share is 75%.
Show what stays fixed.
Split each quarter into two equal pieces. Six of the eight pieces are selected, so 3/4 = 6/8. The selected region and the whole stay fixed.
Close the explanation.
Start from 60%. Write its decimal and its fraction using fifths, then explain how many of five equal parts would be selected. Attempt it before revealing the answer.
Change the question.
60% = 0.6 = 3/5, so three of five equal parts are selected. Now start from 2/5 and convert: 0.4 and 40%. The whole still matters when comparing physical amounts.
English & writing homework
Find your argument.
Keep your voice.
Use feedback to make a decision about your draft, then write the revision yourself.
Start by showing the assignment and the passage or paragraph you are working on. Ask whether your claim answers the question, whether the evidence supports it and where the explanation becomes vague. These are different checks, so give each one a clear focus.
Lirno can help you understand a prompt, develop an outline or discuss a revision. Ask for comments before requesting a rewrite. Specific feedback gives you more control over what changes and helps you recognize the same issue in your next paragraph.
Consider this original miniature passage: “The doors opened. Sam stepped back, still holding the ticket.” The available ticket and open doors create an opportunity; the backward movement suggests hesitation. That interpretation uses the words on the page without inventing why Sam hesitates. Use the same evidence check with your assigned source.
Build a clearer English paragraph →Writing Lab
Make the paragraph
earn its conclusion.
A polished sentence can still leave the argument unfinished. Lirno’s Writing Lab helps you plan claims, organize evidence and revise clarity. Decide what the reader needs to understand before changing the wording.
For a proposal essay, inspect the scope of the claim. In original practice data, 12 of 20 respondents prefer later library hours. That supports a preference statement about those respondents; it does not prove better grades or universal demand. Feedback can help identify that gap before you revise the argument.
ILLUSTRATIVE DRAFT
“Later library hours will improve every student’s grades.”
Original practice data: 12 of 20 respondents prefer later hours. The draft claims an outcome and a population the survey did not establish.
A SUPPORTED REVISIONMake the claim
Make the claim
fit the evidence.
“A majority of the 20 respondents preferred later hours, supporting a trial of one later opening evening.” This connects the measured preference to a limited proposal. Staffing requirements and actual attendance still need checking.
Follow a draft-to-feedback workflow →These are original practice data. In your draft, verify the real source, state its scope and keep conclusions tied to what it measured.
Flashcards & quizzes
Today’s explanation.
Tomorrow’s recall.
Understanding an answer while reading it is the beginning. Producing it later is the next test.
Use Lirno to create flashcards or quiz questions around the topic you just worked on. Keep each question focused: one definition, one relationship or one decision. For a process, include a question about why something happens as well as what happens next.
For example, the front of a card can ask: “Why does doubling final solution volume halve molarity when no solute is added or lost?” The checked answer is that n stays fixed while the denominator V doubles. Hide that answer before making your prediction.
Change the format when the skill changes. A definition can become a short-answer card; a distinction can become a comparison; a calculation needs a new set of values. “Area or perimeter for carpeting a room?” asks you to choose the quantity, while “Recall the area formula” tests a narrower job. Keep the expected answer and its unit on the hidden side.
Get Lirno for iOSMistake Book & review
Keep the correction.
Catch the pattern.
A mistake becomes useful when it changes your next attempt.
Lirno’s Mistake Book gives you a place to keep the misconception, the correction and a clue for next time. Save the decision that failed, rather than a page of copied working. “I forgot to distribute the negative” is something you can act on.
Then turn the correction into a small test. If the original mistake involved brackets, use a fresh expression with a different sign or coefficient. Try it before opening the note. The new attempt tells you whether you recognized the pattern independently.
Use review and subject activity to choose the next topic. Completed tasks show that you worked; explaining a method without the answer visible shows something different. Keep both in view when deciding what needs another pass.
Make an error into a useful review note →
A small correction worth keeping
PREPARED MISTAKE NOTE / ALGEBRAThe sign belongs
The sign belongs
to the whole bracket.
Attempt−2(x − 3) = −2x − 6
Correction−2(x − 3) = −2x + 6
Why: the product of −2 and −3 is +6.
Next clue: multiply every term inside the bracket, including its sign.
Fresh check: expand −3(y − 2) before looking back.
Homework planning
A plan you can
actually start.
Replace “do homework” with the next action you can see.
List the assignment, the due date and the thing you need to produce. “Finish English” could mean choosing evidence, writing a draft or revising a paragraph. Those tasks need different amounts of time and different starting points.
Lirno brings homework planning and focus tools alongside tutoring. Break a larger assignment into a manageable action, reserve time to work and leave room to check what you have done. After a session, update the plan using the progress you actually made.
For a 90-minute evening, estimates of 25 minutes for algebra, 40 for essay work and 10 for recall leave 15 minutes for a break and checking. That fits exactly, with no spare buffer. If the essay needs more time, narrow its deliverable before beginning. End with a handoff such as “Two quotations selected; next explain the second link to my claim.”
Make a practical homework plan →AN EXAMPLE EVENING
Small actions.
Visible progress.
- Math worksheetFirst
Try questions 1–4. Check by substitution.
- English paragraphNext
Choose evidence for the main claim.
- Biology reviewLater
Answer five recall questions.
An example plan for a manageable evening.
25 MINUTES. ONE CLEAR TASK.
Draft the analysis for one English paragraph.
Focus sessions
Give the next
25 minutes a job.
Protect a task, then see what changed.
Lirno offers focus blocks of 15, 25 and 50 minutes. Choose the length around the work you have: a short restart, a single homework block or a more sustained writing session. The useful part is deciding what you will do before the timer begins.
Define a stopping point you can recognize. “Choose two relevant pieces of evidence” is clearer than “work on English.” Keep any tutoring question tied to that task, so opening the app helps the block continue.
When the block ends, record what you finished and what remains. If you uncovered a missing idea, leave a specific question for the next session. Adjust the plan to the work you actually completed rather than treating the original estimate as a verdict.
Plan a block with a useful finish →Exam Coach & preparation
Find the gap.
Practice the right thing.
Let a short attempt tell you where your revision time belongs.
Lirno’s Exam Coach is built around diagnosis, targeted practice and retesting. Start with the topics in your actual assessment. Try a few questions before opening your notes, then distinguish a forgotten fact from a misunderstood concept or a calculation slip.
Work on the cause of the mistake. If you chose the wrong formula, practice deciding which relationship applies. If a biological process is unclear, rebuild its causal chain. Another page of general notes may not address that specific gap.
Check coverage as well as mistakes. A strong result on algebra questions says little about a graph task you have not tried yet. Keep a list of the required formats, mark the unsampled ones, and reserve a short first attempt for each. Use the next review to address the evidence from those attempts, rather than treat one practice score as a guarantee.
Build a more focused revision session →
A simple workflow
From question
to confidence.
You do not need a perfect prompt to begin. Bring enough context, choose the help you need and finish by doing something with the explanation.
- 01
Bring the question.
Photograph the complete task or type it in. Include the diagram, units and instruction that determine what you need to answer.
- 02
Show where you are.
Add your attempt or say what feels unclear. Ask for a hint, an explanation or a check at that exact point.
- 03
Follow the reason.
Read the response against the original question. Ask about a missing connection and inspect any uncertain detail.
- 04
Try it yourself.
Complete the next step, explain the idea aloud or attempt a fresh question. Keep the method you can use again.
A useful first message
Ask about the part
that needs explaining.
Your task gives the tutor a question. Your attempt gives it a starting point.
For algebra, include the complete equation and the last line you wrote. “I expanded 3(x − 2) as 3x − 2; which product did I miss?” gives the tutor something specific to inspect. The multiplier belongs to both terms, so the correct expansion is 3x − 6.
For science, name the quantity and its units. “My answer is 15 m/s, but the question asks for acceleration” points to a model mismatch: acceleration needs a change in velocity over time. For writing, supply the passage and ask which sentence makes a claim without evidence.
Use the prompt beside this section as a starting point. Replace the topic and add your homework photo or typed question in the app. You can ask for the required class method, a simpler explanation or feedback before the final answer is revealed.
Before requesting a complete solution, choose a finish you can check. You might isolate x and substitute its value, explain a graph interval with the correct units or add analysis after one quotation. Ask a follow-up when that particular decision remains unclear.
For a longer assignment, keep the first request small. Check one paragraph or one problem, then carry the useful method into the rest of the work. Follow up with the next uncertainty instead of asking the tutor to replace the entire task.
COPY. ADAPT. ASK IN LIRNO.
I am working on this homework question. Here is my attempt and the step I do not understand. Explain the reason for the next move using the method from my class, then let me try it before showing the full answer.
Useful help, clear expectations
A smart tool.
Your judgment.
An explanation should earn your trust through reasoning you can check.
AI can misread a scan, make a calculation error or state a claim too confidently. Keep the original assignment beside the response. Verify important facts, formulas and quotations against your course materials, and ask for the assumptions when a conclusion is unclear.
Use Lirno in the way your teacher allows. It can help you practice, ask questions and inspect an attempt; your submitted work should reflect your understanding. No homework tool can promise a particular grade or exam result.
Lirno is available for iPhone and iPad. Bring the question, your attempt and the point where you got stuck. A focused request gives the tutor useful context for explaining your next step.
Questions about access or the app? →Start with your situation
What is getting
in your way?
A subject name is a starting point. The difficulty tells you which guide will help. Choose the situation closest to yours, then use its example and checks with your own assignment.
“I have the worksheet.”
Capture the instruction, diagram and details that determine the answer. Check the scan before asking for help.
“I lost the reasoning.”
Focus on the transition between two lines. Ask what changed and why the operation is allowed.
“My draft feels vague.”
Check the claim, evidence and explanation separately. Revise the missing connection in your own words.
“The test is coming.”
Try a short question without notes. Let the error decide what you review before the next attempt.
Beyond one subject
Keep the habit.
Change the task.
Homework can move from equations to a source analysis, a vocabulary exercise or a programming question in the same evening. Lirno supports multi-subject tutoring; the useful request changes with the kind of reasoning you need.
Keep the task, your level and your attempt together. Then ask about the part that cannot be settled by a topic label alone.
History & geography
Separate evidence
from interpretation.
For a source, identify who created it, when and for what audience. For a map, name the key and scale before describing a pattern. Ask which conclusion the supplied material supports and where its limits remain.
Languages
Use the rule
in a new sentence.
Include the sentence and the grammar point you are practicing. Ask why one form fits this context, then make a different example yourself. Check whether the explanation matches the terminology used in your class.
Computer science
Trace what
actually happens.
Show the relevant code, the expected result and the output you received. Ask to trace one short input through the logic. Locate the first difference before changing several parts of the program together.
These are suggested tutoring approaches. The permanent HomeworkPath collection currently focuses on math, science and English, with worked examples for each.
Explore the subject collection →FAQs
Before your first question.
What is HomeworkPath?
HomeworkPath is an English learning resource for Lirno. It explains homework methods, shows worked examples and helps you choose the right app tool. Live tutoring and scanning happen in the Lirno app.
Can Lirno help with homework from a picture?
Yes. Photograph the question clearly and include its instructions, symbols and diagrams. Check what was captured before using the explanation. You can also type a question and add your own attempt.
Is this just a math homework helper?
Math is one part of it. Lirno also offers multi-subject tutoring, including science and English. These guides cover algebra, geometry, word problems, physics, chemistry, biology and writing.
Can I ask for step-by-step help?
Yes. Ask Lirno to explain each operation and the reason behind it. If you only need a nudge, request one hint without the final answer. Tell the tutor about any method required in class.
Can I use it to study for a test?
Lirno includes flashcards, quizzes and Exam Coach tools. Use them to identify a gap, practice the relevant idea and test it again. Keep your revision aligned with the topics in your assessment.
Where can I download Lirno?
Get Lirno from the App Store for iPhone and iPad. Use a Get Lirno button on this page to open the official listing, then bring your first homework question into the app.
What is a Homework Mission?
A Homework Mission breaks an assignment into smaller learning steps. Use it to identify the first action, work through the reasoning and keep the useful idea for later practice.
When should I use Lesson Studio?
Use Lesson Studio when a topic needs a fuller explanation or a visual sequence. Choose a specific learning goal, compare the lesson with your course material and try a question without the answer visible.
Can Lirno help me review recurring mistakes?
The Mistake Book and review tools help you keep the misconception, its correction and a clue for the next attempt. Use a fresh question to check whether you can apply the correction independently.
How can parents support the learning?
Ask the student to explain the task and their next step before looking at the answer together. Discuss the reasoning, use the class materials for checks and follow the school rules for AI help.
The study journal
More useful ideas
are on the way.
Our journal will bring focused explanations, homework methods and study practice into one collection. The first articles are still being prepared.
For now, start with the permanent subject guides. Each gives you a concrete example and a way to check the reasoning.
Visit the journal →More “got it.”
Bring your next question to Lirno for hints, explanations and practice.
Get Lirno for iOS
iPhone & iPad · Free to download