Organic Chemistry I
Structure and bonding, acids and bases, stereochemistry, alkyl halides, substitution and elimination, alkenes and alkynes. The bundled study library is labelled by course, so Orgo 1 material is easy to find.
Free on iPhone and Android
Type a reaction or snap a photo of the question. You get the reaction type named, each mechanism step explained, and the major product spelled out — not just an answer to copy.
Free to download · no account, no sign-up
What it does
Not arithmetic. Mechanisms, selectivity and knowing why the other product loses.
A solution that only names the product teaches you nothing on the exam. Every solve is split into numbered steps that say what attacks what, which bond breaks, and where the charge goes — the same reasoning your curved arrows encode.
Skeletal structures do not survive a keyboard. Point the camera at a printed or handwritten question, a structure or a full reaction scheme, crop to the part you care about, and let the app read it. Prefer typing? Add a topic hint and it steers the solver.
Regiochemistry and stereochemistry are where marks disappear. Solutions name the governing rule rather than leaving you to guess it — Markovnikov or anti-Markovnikov, Zaitsev or Hofmann, ortho/para or meta, retention or inversion at the stereocentre.
Sometimes the problem is not the problem. Ask about a reagent you have never seen, why a synthesis runs in that order, or what a question is even asking. Three modes cover the three ways students get stuck.
The offline half of the app is free forever and works on a plane, in a basement lecture hall, or on airplane mode the night before a final. No sign-in, no counter, no paywall.
How it works
Four steps, no account, no setup.
Photograph the problem and crop it, or type it out and tag the topic.
It works out what is being asked, identifies the topic and picks the mechanism that fits.
Numbered steps with explanations, the reaction type named, and the final answer highlighted.
Every solve is saved to a searchable history. Ask the tutor a follow-up, or drill the topic with flashcards.
Inside the app
Screens captured on a phone running the current build — nothing mocked up.












Examples
Typed in plain English or photographed off the page — both work.
“Predict the major product when 2-bromo-2-methylbutane reacts with sodium ethoxide in ethanol.”
tertiary substrate + strong base → elimination“Draw the mechanism for the acid-catalyzed hydration of propene.”
Markovnikov addition via a carbocation“What happens when benzene is treated with HNO₃ and H₂SO₄?”
electrophilic aromatic substitution — nitration“1-bromobutane + NaOH — which mechanism, and what is the product?”
primary substrate, strong nucleophile → SN2Use cases
Structure and bonding, acids and bases, stereochemistry, alkyl halides, substitution and elimination, alkenes and alkynes. The bundled study library is labelled by course, so Orgo 1 material is easy to find.
Aromatics and EAS, carbonyl chemistry, aldol and enolates, carboxylic acid derivatives, amines, spectroscopy and retrosynthesis — 39 chapters in total.
Photograph the question, read the mechanism steps, then redo it yourself. Every solve stays in a searchable history so revision does not start from zero.
Check My Homework takes your working and gives a verdict with feedback, which is the difference between finding a mistake now and finding it in the exam.
Ten-question rounds pulled from an offline bank of 397, with hints when you stall and the right answer the moment you choose.
Molar mass, percent yield, limiting reagent, degree of unsaturation, pH — plus 522 formula entries, all free and all offline.
Guides
Worked tutorials on the topics students search for most. Free to read, no app required.
A decision procedure that works under exam pressure: substrate first, then nucleophile or base, then solvent and heat.
Read the comparison →The five-question routine that turns any reagent-plus-substrate prompt into a defensible product.
Learn product prediction →Arrows start at electrons and end at nuclei. The rules, the four moves, and the mistakes graders punish.
Learn arrow pushing →Nitration, halogenation, sulfonation, Friedel–Crafts — and how to call ortho/para versus meta every time.
Work through EAS →One electrophilic carbon explains most of Orgo 2. Addition, aldol, and nucleophilic acyl substitution in one place.
Study carbonyl chemistry →Why the proton goes where it goes, when the rule flips, and which reagents skip the carbocation entirely.
Read the addition guide →Cahn–Ingold–Prelog priorities without the hand-waving, including what to do when the lowest priority points at you.
Learn R/S and E/Z →Disconnections, synthons and reagent equivalents — how to plan a multi-step synthesis backwards.
Start retrosynthesis →How to photograph a structure or scheme so it is actually readable, and what to do when handwriting fails.
Read the scanning guide →FAQ
Mechanisms, scanning, cost, and what stays on your phone.
All four begin the same way — a substrate with a leaving group meets a nucleophile or a base. Substrate class decides most of it: methyl and primary go SN2, tertiary goes SN1 or E1 through a carbocation, and a strong bulky base forces elimination. Nucleophile strength, solvent and temperature settle the rest. Learn the full decision procedure →
Name the functional group, name what the reagent is (nucleophile, base, electrophile, oxidant, reductant), decide which mechanism that pairing implies, then apply that mechanism's selectivity rule — Markovnikov or anti-Markovnikov, Zaitsev or Hofmann, ortho/para or meta, retention or inversion. Learn the five-question routine →
Yes. Photograph a printed or handwritten question, a skeletal structure or a reaction scheme, crop to the part that matters, and the app reads it before solving. Typing works too, with an optional topic hint. Learn how to scan a structure properly →
Solutions are broken into numbered steps that state what attacks what, which bond breaks and where the charge ends up — the reasoning curved arrows encode. The bundled library holds 106 named mechanisms you can browse by reaction type. Learn to push arrows yourself →
A general chatbot answers in prose and starts cold every time. A dedicated solver returns the same structure every time — reaction type, numbered mechanism steps, then the major product — keeps a searchable history, and ships an offline study library beside it. Either way, check an AI answer against your course notes before you hand it in. See the honest comparison →
Yes. The bundled study library is labelled for Organic Chemistry I and Organic Chemistry II and spans 39 chapters, from structure and bonding through alkyl halides, alkenes and aromatics to carbonyls, amines, spectroscopy and retrosynthesis. See what is covered →
Free to download, with three free solves per device shared between the solver and the tutor. The calculators, the 522-entry formula reference, the mechanism library, the flashcards and the quizzes are free forever. Pro unlocks unlimited solving at the price your store shows for your region. There is no free trial.
The study side does — flashcards, quizzes, the mechanism library, the cheat sheet, the calculators and the formula reference are bundled in the app and need no connection. Solving and the tutor call an AI model, so those need internet.
A photo is sent once so the model can read the question and is not stored on a server afterwards. Your solve history stays on your device. There is no account, no sign-up and no advertising ID. Read the privacy policy →
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