About · Fly Infinity Studio

We build Android apps for ordinary, unglamorous problems — then get out of the way. No account to create, no tour to skip, no setup before the thing you came for actually works.

What we build

Fly Infinity is a small, independent studio publishing Android apps under the name Fly Infinity Studio. There are currently 10 apps in the catalogue, 5 of them live on Google Play. They are unrelated to each other: a language-exam trainer, a PDF form filler, a random picker, a unit converter. What they have in common is the kind of problem they solve — narrow, ordinary, and more annoying than it ought to be.

We do not build platforms, and there is nothing here to integrate with. There is no API, no developer account, no dashboard and no service to subscribe to. Each app is a self-contained thing you install and use.

How the apps are paid for

Every app is free to download, and there is no trial that expires. Beyond that the answer genuinely differs per app, so here is the whole of it rather than a summary that would be wrong somewhere:

7 are ad-supported. Advertising pays for them. Each one’s privacy policy names the advertising provider, says what it can see, and explains how to opt out of personalised ads.
One sells a subscription: Sproochentest. Free content plus a paid tier, bought through Google Play rather than from us, and it has its own terms of use setting out what the money buys.
3 have nothing to sell at all — no ads, no paid tier, no purchases. They exist because we wanted them to exist.

We also take on a small number of outside projects. If you have something focused in mind — a tool, a utility, something that ought to be simpler than it currently is — that is what the email address is for.

What we hold the apps to

These four are the standards the catalogue is actually built against, not aspirations. Where an app cannot meet one, its page says so plainly rather than staying quiet:

Offline wherever it is possible: If a feature can run on your device, it does — no spinner waiting on a server. Where something genuinely needs one, such as speech synthesis or live exchange rates, we say so plainly instead of hiding it.
No sign-up without a reason: Most of our apps have no account at all — you open them and start working. The one that does needs it to sync your progress across devices, and nothing else.
Every SDK named: Each app has a full privacy policy listing every third-party SDK it contains, what that vendor can see, and how to opt out. No "we may share data with partners".
Built to feel fast: Native Kotlin and Jetpack Compose, Material 3, and a hard budget on every interaction. No web views pretending to be apps.

What that adds up to

The figures below are counted from the app catalogue when this page is built, so they cannot drift out of date. They are also the reason the four standards above are written as standards rather than slogans — 8 of 10 apps work offline, which means some do not, and we would rather say which.

10 apps in total, 5 live on Google Play.
8 of 10 work offline.
9 of 10 have no sign-in at all.
3 of 10 show no ads.
9 of 10 collect no personal data whatsoever.

This website

The site ships no JavaScript, sets no cookies and runs no analytics — a test enforces the first of those on every build, so it cannot quietly stop being true. We do not know who visits it, and we have no way of finding out.

Each app has a page here stating what it collects before you install it, and its full privacy policy alongside. Every third-party library inside a published app is credited on the licences page, which the build refuses to let fall behind the catalogue.

Getting in touch

One address, fly.infinity.official@gmail.com, handles everything — questions, bug reports, privacy requests and outside work. We aim to reply within 7 days. There is more detail, including what to send for a data request, on the contact page.