About

Small things that teach you something or help you get something done, and then get out of the way.

Two kinds of thing

Everything here is one of two things. The split is about what a thing is for, not about how it is built. A game can teach you as much as an app can, and two of the language tools are apps rather than games.

Educational

You finish knowing something you did not know before: how a computer is built up from a single logic gate, how to read an unfamiliar alphabet, how to say what you mean in a new language.

  • Human Computer
  • Human Calculator
  • Computer Inventor
  • Code Literacy
  • Read the Road
  • Minimal Russian
  • Fluent Cyrillic

Productivity

You keep track of something that matters to you. The app holds the record; the deciding stays with you.

  • Health Bar
  • Life Tracker
  • Work Tracker

Your data stays on your device

There is no account to make, and nothing an app does needs one. Each app saves to your browser's own storage: no server keeps a copy, and nothing about you is collected or measured.

That has a real cost, so it is worth saying plainly. Backups are your job. Every app can write its data out to a file from its settings, and if you clear your browser data, you clear the app with it.

One exception, for the sake of being exact: these pages load a typeface from Google Fonts. It carries nothing you have typed, and with syncing off it is the only request that goes anywhere but this site.

Syncing, only if you ask for it

All five apps can keep their data in step across two devices by signing in with Google. It is off until you turn it on, it can be turned back off, and every one of these apps is complete without it. If you never touch it, the section above is the whole story.

While it is on, it is the one thing that leaves your device: that app's own data — your habits, your entries, your settings — is stored in a database we run on Supabase, in Frankfurt, so a second device signed in as the same account can pick it up. What we keep alongside it is a Google account identifier and nothing else. Not your name, not your email address, no record of when you opened the app or what you looked at.

Turning it off is on the same screen that turns it on, and it deletes the stored copy rather than merely disconnecting from it. The app carries on unchanged on the device, because the copy on your device was always the real one.

Nothing asks for you back

No notifications, no mailing list, no ads, nothing to pay for. If you stop using one of these, nothing will chase you to come back. They are meant to be useful when you open them and silent when you do not.

The trackers also only know what you tell them. Nothing is measured on your behalf, which means the numbers are worth exactly as much as your honesty in entering them.

They keep working offline

The apps install to a home screen and run with no connection at all. That is not a feature added on top; it follows from everything already being on your device. There is nothing to wait for.

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