Does your phone actually support VoLTE? Find out in one tap.
Live 200K+ downloads on Google Play
We build software that ships.
Rank9 Labs is a small studio that takes products end to end — Android, iOS, web, and custom Android OS builds. Our own diagnostic apps have been downloaded over 200,000 times, and the same team is available for hire.
200K+downloads on Google Play
3.5★average rating, 3.5K reviews
6yrshipping and supported
Our apps
Built by us, used by thousands
Every app below is published under Rank9 Labs. No sign-ups, no dark patterns — they answer a question and get out of the way.
Tools that answer one question, fast.
Is it your phone, your plan, or your area? Get a straight answer.
Games
1Small games, made properly.
The 3×3 classic with a twist — slide your marks, and play a friend online.
Services
What we do for clients
We ship our own products, which means we've already made the mistakes on our own time rather than your budget.
Custom Android OS development
AOSP builds, custom ROMs and device bring-up — vendor blobs, SELinux policy, verified boot and OTA infrastructure for purpose-built hardware.
Read moreEnd-to-end product development
Idea to store listing, handled by one team — shaping, design, build, release and the maintenance afterwards.
Read moreAndroid app development
Native Kotlin built to survive real devices — OEM skins, flaky radios, and every API level you actually support. Play Store submission included.
Read moreiOS app development
Swift apps built alongside the Android build so the two stay in step rather than six months apart.
Read moreWeb development
Marketing sites, dashboards and web apps — fast, accessible, and editable without filing a ticket with us.
Read moreTelecom and device diagnostics
Our apps read telephony state on hundreds of thousands of handsets. That domain knowledge — VoLTE, IMS, 5G NSA/SA — is available for hire.
Read more
About
A studio, not an agency
Publishing on Google Play since 2020. What began as one developer working out why VoLTE had silently stopped working after a carrier switch turned into apps downloaded more than 200,000 times by people chasing the same answer.
Got something that needs building?
Android, iOS, or a Play Store problem you can't get past. Tell us what you're working on and we'll tell you straight whether we're the right fit.