Homework that ends.
Misses that return.
Bring the question that confused you. Sugar helps you understand it, you try one yourself — and anything that needs another look comes back before your test.
Drop the part that makes zero sense.
Sugar answers your first question free, right here. We'll hold your question for this session so you can pick up after signing up. It's deleted if you don't.
Start with a question
Start free — no card required.
Ages 13+ · Parent approval for 13–17
One Loop, start to done
- 1Guide meSugar asks one step at a time and checks your answer.
- 2Teach-backYou explain it in your own words. Sugar names any gap.
- 3You're done for today.Anything shaky comes back before your test.
Notes from students who tried LemonSugar Ai
Paid student testers, shared with permission.
Notes from students who tried LemonSugar Ai. “It makes studying more interactive and helps you retain information through recall instead of just reviewing notes.” — College student. “I’d recommend it as is. It’s a great site and easy to use — other college students would love it.” — College student. “The practice questions were very helpful — not too simple, not confusing — and the explanation was thorough.” — College student. “I loved the explanation after getting a problem wrong — that’s where my aha moment came from.” — College student. “It really helped me understand the concept I was stuck on.” — College student. “After I clicked try again, I got a much simpler explanation that finally made sense.” — College student. “It helped me put my knowledge to use — everything started to make sense.” — College student. “I loved how it let me actively recall what I studied by creating a quiz.” — College student. “Most useful was the practice quiz.” — College student. “It’s made for studying — and as a student that’s the most helpful for me.” — College student. “It summarized the topic so easily and gave me an understandable rundown.” — College student. “It responds super fast with detailed steps.” — College student. “Very educational and more focused toward college students.” — College student. “It helped me understand this electrical engineering problem.” — College student. “The prompt format and diagram explained the topic clearly.” — College student. “It was explained in a way that was much more helpful than my lecture notes.” — College student. “The Guide me feature — the best version of something similar I have used.” — College student. “It gave me a very clear answer that helped with my school work.” — College student. “It’s very easy to use and actually helpful.” — College student. “The most useful was the practice quiz.” — College student. “I found the flash card option to be most useful.” — College student. “It’s not just a straight answer — it explains step by step.” — College student. “The fact that it walks you through problems.” — College student. “I found its explanations the most useful.” — College student. “The recall tool.” — College student. “It wasn’t just questions and answers — it was questions, learn, apply, and a thorough explanation.” — College student. “Most useful was the detailed answer.” — College student. “The most useful was the detailed answer.” — College student. “I’d recommend this because it helps explain topics that are hard to understand on your own.” — College student.
“It makes studying more interactive and helps you retain information through recall instead of just reviewing notes.”
— College student “I’d recommend it as is. It’s a great site and easy to use — other college students would love it.”
— College student “The practice questions were very helpful — not too simple, not confusing — and the explanation was thorough.”
— College student “I loved the explanation after getting a problem wrong — that’s where my aha moment came from.”
— College student “It really helped me understand the concept I was stuck on.”
— College student “After I clicked try again, I got a much simpler explanation that finally made sense.”
— College student “It helped me put my knowledge to use — everything started to make sense.”
— College student “I loved how it let me actively recall what I studied by creating a quiz.”
— College student “Most useful was the practice quiz.”
— College student “It’s made for studying — and as a student that’s the most helpful for me.”
— College student “It summarized the topic so easily and gave me an understandable rundown.”
— College student “It responds super fast with detailed steps.”
— College student “Very educational and more focused toward college students.”
— College student “It helped me understand this electrical engineering problem.”
— College student “The prompt format and diagram explained the topic clearly.”
— College student “It was explained in a way that was much more helpful than my lecture notes.”
— College student “The Guide me feature — the best version of something similar I have used.”
— College student “It gave me a very clear answer that helped with my school work.”
— College student “It’s very easy to use and actually helpful.”
— College student “The most useful was the practice quiz.”
— College student “I found the flash card option to be most useful.”
— College student “It’s not just a straight answer — it explains step by step.”
— College student “The fact that it walks you through problems.”
— College student “I found its explanations the most useful.”
— College student “The recall tool.”
— College student “It wasn’t just questions and answers — it was questions, learn, apply, and a thorough explanation.”
— College student “Most useful was the detailed answer.”
— College student “The most useful was the detailed answer.”
— College student “I’d recommend this because it helps explain topics that are hard to understand on your own.”
— College student
Example · nothing is sent or saved
One question, from confused to remembered.
Bring the part that confused you
Getting an answer vs. actually getting it
Just the answer
- – Homework done, idea still fuzzy
- – Same mistake shows up on the test
- – Nothing to come back to
With LemonSugar Ai
- ✓ One step at a time, in plain words
- ✓ You try a similar question yourself
- ✓ Misses come back on your practice list
Need the full worked answer? Switch to Answer mode any time.
The kind of questions students bring
Example questions — type yours in the box at the top.
Algebra
Why do I flip the sign when I divide an inequality by a negative?
Chemistry
How do I know how many moles of O₂ react with 2 mol of H₂?
Biology
What does the Krebs cycle actually produce, in plain English?
History
Why did the Treaty of Versailles make another war more likely?
Physics
Why does a heavier object not fall faster without air?
Writing
Is my thesis arguing something, or just describing?
How it works
Ask → understand → practice → remember. In your language, on your phone.
- Step 1Ask
Snap a problem, type a question, or ask out loud — in any language.
- Step 2Understand
Sugar explains it your way: direct, Socratic hints, or Feynman-style.
- Step 3Practice
Turn the explanation into a quick quiz or flashcards, so you use it instead of copying it.
- Step 4Remember
Sugar keeps what you got wrong and brings it back before the test.
10 free messages a week covers a light week. It does not cover the week before a test — lift the weekly cap before your next exam.
Two plans
| Feature | Lo-FiFree — 10 messages a week | ThriftyBest$99/year — founding offer $49 your first year |
|---|---|---|
| Price | $0 | $99 / yearAbout $8.25 a month — less than one hour with a human tutor. Monthly ($14.95) also available. |
| Messages | 10 a week (5 in a week after a 30-day break), chat and study tools together. Accounts made before Sept 24, 2026 keep 20 a week. | No weekly message limit |
| Saved cards | Your 15 newest come back; older ones are kept, never deleted | Every card keeps coming back |
No card to start · Cancel anytime · 30-day money-back
Students aged 13–17 are never asked for a card — a parent approves the account and pays. Adult students (18+) can pay for themselves.
Questions, answered.
Clear answers for parents and students.