Reagent: Chemistry Quiz
Balance equations, learn why
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Miss a question and you choose how deep the answer goes. On-device reasoning shows the real worked steps, and a hand-checked bank keeps the answer honest.
Reagent is chemistry revision that explains itself. When you miss a question, you decide how deep the explanation goes, and the deepest setting shows the tutor's own worked steps rather than a paragraph invented afterwards.
The answer key is hand-written and hand-checked, and the tutor is never allowed to contradict it. What changes is how much of the reasoning you get to see.
- Six concepts to drill: acids and bases, redox, kinetics, stoichiometry, organic chemistry and periodicity
- Twenty-four hand-written questions, four per concept, each with its own explanation
- Get one wrong and pick your depth: a hint, a fuller explanation, or numbered worked steps
- Balance five real equations with steppers and a live atom tally that marks each element as it evens out
- Ask why on a wrong balance and the same explanation ladder opens up
- Spaced review that brings a concept back the day you are about to forget it
- A tutor profile you can read and override, showing what it thinks you know
On a device without Apple Intelligence the explanations come from the hand-written bank at a single depth, and every question still works. It all runs offline, with no account.
Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vTDX9pxPOlUJl_skVUHPi99mAw0y2B2BYd_v1mJkoF3xW3rlOcW5KlYd4t93MMbbGhctSTnBTy7d_l6/pub
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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The developer, Andrii Bashta, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
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The following data may be collected but it is not linked to your identity:
- Usage Data
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Information
- Seller
- Andrii Bashta
- Size
- 7.3 MB
- Category
- Education
- Compatibility
Requires iOS 27.0 or later.
- iPhone
Requires iOS 27.0 or later. - iPad
Requires iPadOS 27.0 or later. - Mac
Requires macOS 27.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 27.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Reagent Forever $9.99
- Copyright
- © 2026 Andrii Bashta
