Android app
Install it from here
The app is a file on our own site. It is the same Sifu AI you are reading now, in its own icon, opening straight to today's lesson.
Version 7 · 1 MB · Android 7 and up
What will happen, in order
- The file downloads. Your browser saves it like any other download and shows it in your notifications.
- Android warns you. It will say something like “For your security, your phone is not allowed to install unknown apps from this source.” This is normal for every app that does not come from the Play Store. Tap Settings, turn on Allow from this source, then press back.
- Tap Install. Then open it. The Sifu AI icon goes on your home screen and the app opens on today's lesson.
Why the warning appears
Google shows that screen for any app installed outside the Play Store, whoever made it. It is not a judgement about this file.
Sifu AI has no Play Store listing because our developer account was closed and the appeal refused. That is the whole reason, and we would rather say it than invent a better one.
The file is signed with our own key and served over HTTPS from sifuai.app. Your phone checks that signature on every future update, and it will refuse any version that is not signed by us.
On an iPhone
Apple does not allow an app to be installed from a website, so there is no file to give you. Open sifuai.app in Safari, tap Share, then Add to Home Screen. You get the same icon and the same app.
You do not need this
The website is the whole course. The app is an icon and a faster way back in, nothing more. Nothing is locked behind it.