Licences · Fly Infinity Studio

Our apps are built on work other people published, and several of those licences ask us to say so. This page names every third-party library that ships inside a Fly Infinity app, who wrote it, and the terms it is used under. Nothing here is a marketing list — it is the notice the licences require.

What this page covers

Every app of ours that is live on Google Play — all 5 of them — plus every library that ships inside one. That comes to 21 projects across 65 individual modules.

The list was produced from each app's own build configuration rather than written from memory. Libraries used only to build or test an app are excluded, because they are not inside the app you install; so are version-alignment artefacts, which contain no code. If an app is not listed against an entry, that entry is not in it.

Open source is not the same as free of terms

One distinction on this page is worth making plainly, because a lot of attribution pages blur it. Most of what follows is genuinely open source, published under a permissive licence by people who chose to give it away. Google's Play services libraries — advertising, ML Kit, billing, the consent prompt — are not. They are proprietary software used under Google's own terms, and they are listed in a section of their own rather than folded in among the rest. Calling them open source would be untrue.

Apache License 2.0

A permissive licence. It lets us include the library in a closed-source app, and asks in return that we keep the copyright notice and say what the licence is — which is what this page does.

Read the full terms

AndroidX and Jetpack Compose

The Android UI toolkit itself. Every app here is built on it, though which pieces each app uses differs.

androidx.activity:activity-compose
androidx.appcompat:appcompat
androidx.browser:browser
androidx.camera:camera-camera2
androidx.camera:camera-core
androidx.camera:camera-lifecycle
androidx.camera:camera-view
androidx.compose.animation:animation
androidx.compose.foundation:foundation
androidx.compose.material3:material3
androidx.compose.material:material-icons-core
androidx.compose.material:material-icons-extended
androidx.compose.ui:ui
androidx.compose.ui:ui-graphics
androidx.compose.ui:ui-text-google-fonts
androidx.compose.ui:ui-tooling-preview
androidx.core:core-ktx
androidx.core:core-splashscreen
androidx.credentials:credentials
androidx.credentials:credentials-play-services-auth
androidx.datastore:datastore-preferences
androidx.exifinterface:exifinterface
androidx.fragment:fragment
androidx.fragment:fragment-ktx
androidx.glance:glance-appwidget
androidx.lifecycle:lifecycle-process
androidx.lifecycle:lifecycle-runtime-compose
androidx.lifecycle:lifecycle-runtime-ktx
androidx.lifecycle:lifecycle-viewmodel-compose
androidx.media3:media3-exoplayer
androidx.media3:media3-exoplayer-hls
androidx.media3:media3-ui
androidx.navigation:navigation-compose
androidx.room:room-ktx
androidx.room:room-runtime
androidx.work:work-runtime
androidx.work:work-runtime-ktx

Kotlin standard library

Added by the Kotlin compiler rather than declared by us, but it ships in every app, so it belongs on this list.

org.jetbrains.kotlin:kotlin-stdlib

kotlinx.coroutines

org.jetbrains.kotlinx:kotlinx-coroutines-core
org.jetbrains.kotlinx:kotlinx-coroutines-android

kotlinx.serialization

Spin Wheel

org.jetbrains.kotlinx:kotlinx-serialization-json

OkHttp

com.squareup.okhttp3:okhttp
com.squareup.okhttp3:logging-interceptor

Retrofit

com.squareup.retrofit2:retrofit
com.squareup.retrofit2:converter-gson

Gson

Sproochentest

com.google.code.gson:gson

Guava

com.google.guava:guava

Coil

io.coil-kt:coil-compose

Firebase Android SDK

The client libraries are open source; the hosted services they talk to are Google's, and what they do with data is set out in the app's privacy policy.

Sproochentest

com.google.firebase:firebase-auth
com.google.firebase:firebase-firestore
com.google.firebase:firebase-storage
com.google.firebase:firebase-appcheck-playintegrity

PdfBox-Android

An Android port of Apache PDFBox. It is what reads and writes the PDF, entirely on the device.

PDF Filler

com.tom-roush:pdfbox-android

MIT License

Permissive, and shorter than any other licence here. Its one condition is that the copyright notice travels with the software.

Read the full terms

android-youtube-player: Copyright © Pierfrancesco Soffritti
In
JTV
com.pierfrancescosoffritti.androidyoutubeplayer:core

GPL v2 with the Classpath Exception

The licence OpenJDK uses. The Classpath Exception is the important part: it explicitly permits linking this library into an application without that application becoming subject to the GPL. So the app itself is unaffected, and the obligation is to name the library — here.

Read the full terms

Java 8+ API desugaring support (desugar_jdk_libs)

Backports modern Java date and time classes so they work on older versions of Android.

Sproochentest

com.android.tools:desugar_jdk_libs

Google's own SDK terms

Not an open-source licence. These are Google's proprietary libraries, used under the terms Google sets for them, and those terms require that Google's legal notices be shown to users. They are listed separately for that reason — calling them "open source" would be untrue.

Read the full terms

Google Mobile Ads SDK (AdMob)

What it collects, and how to opt out of personalised ads, is set out in each app's privacy policy.

com.google.android.gms:play-services-ads

Google User Messaging Platform

This is the consent prompt itself — the thing that asks permission before any personalised advertising.

com.google.android.ump:user-messaging-platform

Google Play services Location

com.google.android.gms:play-services-location

Google Identity for Credential Manager

The Google sign-in itself. It is optional in the app, and there is a page explaining how to delete the account it creates.

Sproochentest

com.google.android.libraries.identity.googleid:googleid

Google Play Billing Library

Handles the payment. Google processes it; we never see a card number.

Sproochentest

com.android.billingclient:billing-ktx

Google Play In-App Review

com.google.android.play:review
com.google.android.play:review-ktx

Google reCAPTCHA for Android

Used to tell a person from a script when an account is created, which is why the app can offer sign-in without also collecting more about you.

Sproochentest

com.google.android.recaptcha:recaptcha

Google ML Kit

Barcode reading and translation, both running on the device.

com.google.mlkit:barcode-scanning
com.google.mlkit:translate

Trademarks

Android, Google Play, Firebase, AdMob and ML Kit are trademarks of Google LLC. Kotlin is a trademark of the Kotlin Foundation. Other names above belong to their respective owners. They appear here to identify the software we use, and not to suggest that any of those owners endorses us or our apps.

If we have got something wrong

Attribution is not a formality — if your work is in one of our apps and this page names you incorrectly, credits the wrong holder, or has missed you entirely, tell us at fly.infinity.official@gmail.com and we will correct it. That is a faster route to a fix than a formal notice, and we would rather have it right.