Chemistry you can actually see.
Every AP Chem topic — sliders, live physics, a concept map, a study guide, timed FRQs. Drag a bond angle. Watch equilibrium shift. Learn like it's 2026.
Eight tools that fit together.
Nothing here is a mockup.
This is the Acid-Base Titration simulation itself, running live. Every pH, every point on the curve, solved while you watch.
- AP Chemistry aligned
- Interactive simulations
- Real-time visualization
That frame is the actual Acid-Base Titration simulation, not a recording — open it and drive it yourself.
12 simulations are free right now.
No trailer, no locked demo — the real sliders, the real math, the real readouts. 3 of these swap out at midnight, but the other 9 are yours for good, one from every unit in the course.
Type any formula, then enter one quantity and watch particles, mass, and gas volume solve through the mole hub. Every conversion is a factor-label step with units cancelling, and each rail lights the divide or multiply lane your own arithmetic travels.
A slow-first mechanism throttles particles through a bottleneck up top while a rate-vs-[X] curve responds live. Sliders reveal orders 0, 1, and 2 straight from the slow step.
A 2×2 matrix of acid × base types shows the titration curve and a live BCA table at chosen volumes. Read pH, regime, and major species for each mixing case.
One simulation for every unit of the course.
- Always free
- No expiration
- No account needed
Built for a different job.
Khan Academy, textbooks, and $80/hr tutors are all genuinely useful. None of them let you drag a variable and watch the curve move.
Simistry $34.99 / year | Khan Academy Free | AP textbook ~$120 new | Private tutor $60–120 / hr | |
|---|---|---|---|---|
Interactive simulations Drag sliders, rotate molecules, break the model | Partial | |||
Actual chemistry math live Equations recompute frame-by-frame, not scripted videos | Partial | |||
Aligned to the latest AP CED Every activity tagged 1.1–9.10 | Partial | Partial | ||
AP-style FRQ practice + rubric Timed session, self-score against part-by-part rubric | Partial | |||
Personal mastery dashboard Time on task, streaks, per-unit progress | Partial | Partial | ||
Works on iPad + offline PWA, no install, cached after first visit | Partial | |||
Available 2 AM before exam day On-demand, no scheduling | ||||
Cost for a full AP year | $34.99 | $0 | ~$120 | $1,500+ |
Best pairing: use Simistry for the "I need to see this" moments, keep the textbook for reference, and save the tutor for the two topics you actually can’t crack.
Start free.
Pay when it’s worth it.
Free needs no card and never expires. Pro unlocks the full catalog and cancels anytime. Lifetime is backed by a real score guarantee. See the full pricing page →
A real working slice of the platform — free forever, no time limit.
- ✓9 core simulations · unlimited replays
- ✓3 daily rotating free simulations
- ✓Live previews of every locked sim
- ✓Interactive AP reference sheet
- ✓Light & dark themes
- ✓Guest access — no sign-up needed
About 9.6¢ a day. Everything you need for a full AP Chemistry year.
- ✓Everything in Free, plus:
- ✓100+ simulations — 97 sims and 7 lab trainers, plus 3 tools
- ✓Timed FRQ practice with rubric self-scoring
- ✓Personal dashboard · mastery · time · streaks
- ✓Study Guide & Concept Atlas, unlocked
- ✓Notes pinned to any simulation
Pay once. Use forever. Backed by a real refund if your score doesn't move.
- ✓Everything in Pro, permanently unlocked
- ✓50% refund if you self-report a 1 or 2See how it works →
- ✓All future units, sims & tools included
- ✓Priority support & feature requests
- ✓Founder pricing — limited launch offer
Everything, answered.
The questions that come up most before people sign up.
Every sim, tool, and study-guide page maps to a specific 1.1–9.11 CED topic and shows that tag on the card. We track the AP Chemistry Course and Exam Description (2024 edition) verbatim, including the exam-weighting per unit and the required science practices.
Khan Academy is a lecture. A textbook is a static page. Simistry is a real interactive simulation you can drag, rotate, and break, and every one runs the actual chemistry math live. You're not watching someone else move sliders; you're moving them yourself and watching the equations respond.
Free includes 12 full simulations, live preview of every locked sim, the interactive AP reference sheet, and light/dark themes, no card required. Pro adds the full catalog (100+ simulations plus every tool and lab trainer), FRQ practice with rubric self-scoring, the mastery dashboard, and unlocks the Study Guide and Concept Atlas.
Pro is a simple subscription, monthly or yearly, and you can cancel anytime from the account page, keeping access through the period you already paid for. The Lifetime score guarantee is a 50% refund if you buy 60+ days before your exam, log 40+ hours across at least 6 of 9 units, and still self-report a 1 or 2 on the AP Chemistry exam, verified against your College Board score report. You keep the account either way.
Yes. Everything is a PWA, so after your first visit it is cached locally and every simulation you’ve opened once is playable without a connection, no install required. FRQ syncs when you’re back online.
9 core simulations, one from every unit in the course, are free for good. Another 3 rotate daily, so there is always something new to try, and every locked sim is fully previewable before you unlock the rest with Pro. No card is needed to explore the free set.
It depends, there is no set schedule. New simulations and features ship whenever they are ready rather than on a fixed timeline. If there is something you want to see, suggest it at /suggest, and if it is a good fit I will add it as soon as I can. Lifetime members get every future unit, sim, and tool included forever, with no upgrade tier as the catalog grows.
We store only what’s needed to run your dashboard: attempts, mastery, notes. No ads, no data sold to third parties, no scraping your writing to train models. Export or delete your account at any time from settings.
Still stuck? Email [email protected] and we’ll answer in a day.
Ready to stop memorizing and start seeing it?
Jump into the catalog. Pick any unit. The first simulation is one click away.