Physion help

More than 840 curated physics terms across 14 categories, from Foundations of Physics to Plasma Physics.

Yes. Searching and reading terms works completely offline. Watching the linked educational videos and using Ask AI need an internet connection.

A precise definition, formulas, SI units, an in-depth explanation and practical real-world examples.

Yes. Choose from five colour themes in the settings: Deep Sky Blue, Navy Blue, Forest Green, Deep Purple and Midnight Slate.

Physion works on Android 10 or newer.

Ask AI explains any topic in plain words, built around your own question. It is an extra to the dictionary, which works on its own without it.

Only for Ask AI and purchases. Sign in with your Google account in the app. Everything else works without signing in.

Your first 5 Ask AI questions in Physion are free.

To keep things fair, you can ask up to 10 questions a minute and 100 a day, each up to 2,000 characters.

AI answers can sometimes be wrong, so check anything important. Please email us the question and the answer at infyoninnovations@gmail.com so we can improve.

No. Your question is sent to our AI provider only to create the answer, and we do not store its text. See the privacy policy.

This is usually temporary, for example during very high demand. Please try again a little later. You are never charged for an answer that fails.

You can add a plan or a top-up inside the app. The dictionary itself stays free to use.

A plan gives you 1,000 questions for each billing period. The count resets when your plan renews, and unused questions do not carry over. Plans renew automatically through Google Play.

Top-ups are a one-time purchase. Their credits do not expire while your account exists. Questions use free questions first, then your plan, then top-up credits.

Open the Google Play Store, tap your profile picture, then Payments & subscriptions > Subscriptions, choose Physion and tap Cancel. You keep access until the end of the period you have paid for.

Make sure you are signed in with the same Google account you used to buy, are connected to the internet, and reopen the app. If it is still missing, email us at infyoninnovations@gmail.com with the order number from your Google Play receipt (it starts with GPA).

Within 48 hours of buying you can request a refund from Google Play under your Google Play order history. After that, email us with your order number. If a purchase is refunded, its credits are removed.

Yes. Your credits and plan belong to your account, not your phone. Install Physion and sign in with the same Google account.

In the app, go to Settings > Account > Delete account, or follow these steps. This removes your account and data from all Lumnon apps.

Everything is explained in the Physion privacy policy.

Read the Physion terms of use.