Ustad was built for learners who can't afford to be watched. So it collects nothing, asks for nothing, and never connects to the internet.
No name, no email, no phone number. There is nothing to sign up for.
No analytics, no ads, no trackers, no crash reports. After you install it, Ustad does not connect to the internet at all.
Your progress, questions and stars are stored on your phone or computer, encrypted.
Letters stay private unless you choose to share. Before sharing, Ustad removes names and places, shows you exactly what will leave, and signs it with a new one-time key.
A certificate proves the learning, not the person. Only the one holding the file can show it is hers.
In the app, go to Me, then Clear everything. It is gone from the device.
Lessons, your progress, your stars, the questions you asked Ustad and its answers: all of it is saved only on your device, encrypted. Nobody at Ustad can see it, because it never reaches us.
The private part of the app, rights lessons and letters, has its own lock. Its key comes from a code only you know and is kept in memory while you use it, never written to the device.
When you talk to Ustad, your voice is handled on your device. Read-aloud uses the voices already installed on your phone or computer. If a language isn't available on the device, Ustad shows captions and you can type instead. Nothing is sent to a cloud service.
Sharing is always your choice, and keeping a letter private is just as good a choice. If you share, Ustad takes out names, cities, schools, phone numbers and dates, and you review every change first.
The letter is signed with a key made for that one letter and then thrown away, so it can't be linked to you, your device or your other letters. Because the app never goes online, the letter leaves only as a file that you hand on yourself.
Grade packs move phone to phone, by memory card or as a file. They contain only lessons, never anything about you.
This site has no cookies, no analytics and no trackers. Fonts and images are served from this site, not from third parties.
The site is hosted on GitHub Pages. Like any web host, GitHub may keep standard server logs, such as IP addresses, for security. When you download from Google Play or another store, that store's own privacy policy applies to the download.
Last updated 25 September 2026