For orgo, MCAT & DAT prep
Octet is a digital pocket tutor for organic chemistry: 80+ reactions with step-by-step mechanisms, 25 functional groups, 60+ reagents, and instant pKa, IR & NMR reference tables — no account required.
Free to start · iPhone & iPad · iOS 15.1+ · 33 languages
The average organic chemistry course expects you to keep dozens of reactions, reagents, and spectroscopy values straight — across a textbook, lecture slides, and a stack of hand-made flashcards.
Every feature below ships in Octet today — no vaporware, no filler.
Browse 80+ essential organic reactions — SN1, SN2, E1, E2, electrophilic aromatic substitution, Grignard reactions, aldol condensations, and more. Each includes:
Study 25 functional groups with detailed cards covering structure, reactivity, and spectroscopic signatures — IR, H-NMR, and C-NMR chemical shifts.
Search 60+ reagents organized by function: oxidizing agents, reducing agents, acids, bases, nucleophiles, electrophiles, catalysts, and protecting groups — with what each does and when to use it.
Essential data, instantly: pKa values for common acids and bases, an IR spectroscopy frequency table, and H-NMR and C-NMR chemical shift ranges.
The free tier is a genuinely usable study companion — Premium unlocks the full library and the study tools.
A pocket reference earns its place by being useful at three different moments.
Open the reaction's card and walk the mechanism step-by-step, with reagents, conditions, and stereochemistry notes in one place instead of scattered across a chapter.
Use Comparison Mode to view two reactions side-by-side — the fastest way to stop confusing SN1 with SN2 or E1 with E2.
Swipe through Flashcard Mode, mark each reaction “know” or “learning,” and watch your progress climb — then hit the pKa and NMR tables when a passage demands data.
Yes. Octet is free to download and starts you with 20 reactions, 8 functional groups, and 15 reagents. A Premium upgrade unlocks all 80+ reactions, 25 functional groups, 60+ reagents, plus flashcards, comparison mode, and bookmarks.
Octet includes 80+ essential organic reactions, including substitution (SN1, SN2), elimination (E1, E2), electrophilic aromatic substitution, Grignard reactions, and aldol condensations. Each reaction comes with a step-by-step mechanism breakdown, reagents and conditions, stereochemistry and regiochemistry notes, and links to related reactions.
Octet is designed for undergraduate students and pre-med and pre-dental candidates preparing for exams like the MCAT and DAT. Its reaction library, functional group cards, reagent database, and quick-reference pKa, IR, and NMR tables map to the organic chemistry content those exams test.
No. Octet requires no accounts or sign-ups. Open the app and start studying.
Yes. Each functional group card covers spectroscopic signatures for IR, H-NMR, and C-NMR chemical shifts, and the quick-reference section includes an IR frequency table, H-NMR and C-NMR chemical shift ranges, and a pKa table for common acids and bases.
Flashcard Mode lets you swipe through reactions, mark each as “know” or “learning,” and track your progress over time. Comparison Mode places two reactions side-by-side so you can study similarities and differences, and Bookmarks save your most-needed reactions, functional groups, and reagents.
Octet is a universal iOS app for iPhone and iPad running iOS 15.1 or later, with in-app support for 33 languages and both dark and light themes.
Evergreen orgo help from the people behind Octet — no app required to benefit.
Why brute-force flashcards fail, and the pattern-first system that actually sticks.
MechanismsA decision framework for the four reactions students confuse most.
Exam prepWhat the exams actually test, and how to prioritize your orgo review.
SpectroscopyHow to identify functional groups from spectra without memorizing blindly.
Download Octet free and get 20 reactions, 8 functional groups, and 15 reagents — no account, no sign-up.
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