Welcome to pHinder Support

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.

Frequently Asked Questions

ChemBot says it's unavailable. What do I do?

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 gave me a wrong answer.

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.

The onboarding screen keeps showing up.

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.

A pH value in the Examples section seems wrong.

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.

Does pHinder need an internet connection?

No. Everything likelessons, the pH scale, examples, the virtual experiment, and ChemBot, works fully offline. The App makes no network requests at all.

Does pHinder store my data?

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.

Can I use pHinder for exam preparation?

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.

The virtual Experiment lab doesn't seem scientifically exact.

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.

How do I clear my ChemBot conversation?

Tap the clear/reset option inside the ChemBot sheet. Conversations are also automatically cleared when you close the sheet. Nothing is saved.

Known Limitations

ChemBot requires Apple Intelligence (iOS 26, compatible device).
The virtual Experiment lab is a conceptual simulation, not a quantitative chemistry tool.
pH values in the Examples section are representative and may differ slightly from real-world measurements.

Still Need Help?

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.

Feedback & Content Corrections

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".