About Fly Infinity Studio

What we build

Fly Infinity publishes Android apps under the name Fly Infinity Studio. There are currently 9 apps in the catalogue, 8 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.

How the apps are paid for

Every app you can install today is free, and no trial expires. Beyond that the answer differs per app, so here is the whole of it rather than a summary that would be wrong somewhere. These figures count the 8 apps that are actually on Google Play, not the wider catalogue — the unreleased ones are covered at the end.

6 of the 8 are ad-supported. Advertising is what 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.
5 of those also sell subscriptions: Sproochentest, LuxVoice, PDF Filler, Spin Wheel, Land Unit Converter. Free content plus a paid tier, bought through Google Play rather than from us, and each has its own terms of use setting out what the money buys.

The other 1 apps in the catalogue are not on Google Play yet, and their pages say so rather than offering a link that would not work. 1 of those carry no advertising and have nothing to sell at all — but they are not something you can install today, so they are counted separately rather than folded into the figures above.

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 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 catalogue when this page is built, so they cannot drift out of date. They are also why the four standards above are written as standards rather than slogans — 7 of 9 apps work offline, which means some do not, and we would rather say which.

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

This website

We set no cookies of our own and run no analytics of our own, so we do not know who visits this site and have no way of finding out. There is no tag manager, no advertising pixel and no session recording anywhere on it. The one thing we keep on your device is the light-or-dark choice you make in the header, and only once you make it — the privacy policy says exactly what that holds.

The site does run JavaScript, and that was a purchase rather than a default — an earlier version of this page said we shipped none, which was true of the site as it was then built and is not true now. What the code does is draw the pages. It fetches nothing from any other host and records nothing about you, and a test measures how much of it the site sends and fails when that grows past a fixed budget, so the cost stays a decision rather than a drift.

Cloudflare serves the site, and adds a bot-protection script and its own aggregate analytics at the edge, before the page reaches us or you. That is not code we write, but it does run on your visit and it does set one cookie, so the privacy policy says exactly what each of them does rather than leaving the claim above to read wider than it is.

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.

Licences and attributions
Every library in every published app, who wrote it, and the terms it is used under.
What this website collects
Nothing, and the page sets out exactly why there is nothing to collect.

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.