pHinder is a free, offline chemistry education app. There are no accounts, no servers, and no subscriptions, so most questions have a simple answer. Here's everything you might need.
ChemBot runs on Apple Intelligence, which requires iOS/iPadOS 26 and a compatible device with Apple Intelligence turned on. Go to Settings → Apple Intelligence & Siri and make sure Apple Intelligence is enabled. If your device doesn't support Apple Intelligence at all, ChemBot won't be available, but every other part of the App (Basics, Examples, Experiment) works completely without it.
ChemBot is an AI tutor and can make mistakes. Always verify important answers with your teacher or a textbook, especially for exam or assignment work. If you notice a consistent error, let me know at vipulgalgotias@gmail.com so I can improve the configuration.
This shouldn't happen under normal use. If it does, try closing the App fully and reopening it. If the problem continues, deleting and reinstalling the App will reset it.
The values shown are representative, real-world pH can vary based on temperature, concentration, and brand. If you believe something is genuinely inaccurate, please write to me and I'll review it.
No. Everything likelessons, the pH scale, examples, the virtual experiment, and ChemBot, works fully offline. The App makes no network requests at all.
The App only stores two things locally on your device: whether you've completed onboarding, and whether you've seen the in-app tips. Nothing is ever uploaded anywhere. See the full Privacy Policy for details.
Yes, it's a great study companion for understanding pH concepts. Just don't rely solely on ChemBot for specific exam answers, cross-check with your textbook or teacher.
That's intentional. The Experiment tab is a simplified simulation to help you visualise how adding acid or base shifts pH, and how a buffer resists that change. It's for conceptual understanding, not precise chemical calculation.
Tap the clear/reset option inside the ChemBot sheet. Conversations are also automatically cleared when you close the sheet. Nothing is saved.
If your question isn't answered above, reach out directly:
Email: vipulgalgotias@gmail.com
Please include your device model and iOS version when writing in, it helps a lot with diagnosing any issues.
I typically respond within 2–3 business days.
Found a chemistry mistake? Noticed a pH value that looks off? Have a suggestion for a new substance to add to Examples, or a topic you wish ChemBot covered better?
I genuinely want to hear it. pHinder is built for students and I want the content to be accurate and useful. Write to me at vipulgalgotias@gmail.com with the subject line "pHinder Feedback".