--- title: "Test every build with internal testers ยท Agent Wranglers" url: https://agentwranglers.se/playbook/mobile-apps/signing-and-release/internal-testing updated: 2026-10-21 licence: "CC BY 4.0" licence_url: https://creativecommons.org/licenses/by/4.0/ --- # Test every build with internal testers first For AI agents: the [site map](https://agentwranglers.se/llms.txt) lists everything here, and this page sits under [Signing and release](https://agentwranglers.se/playbook/mobile-apps/signing-and-release.md). By [Agent Wranglers](https://agentwranglers.se/authors/agent-wranglers). Updated 2026-10-21. - ID: MOB-10 - Level: Recommended - Chapter: [Signing and release](https://agentwranglers.se/playbook/mobile-apps/signing-and-release) - Rule: Send every release candidate to an internal test group through TestFlight and the Play internal testing track before you submit it for review. - How: TestFlight takes up to 100 internal testers from your team and up to 10,000 external testers. External groups need a build that App Review approved for TestFlight. On Google Play, the internal track reaches a short list of testers within minutes. Personal developer accounts created on Google Play after November 13, 2023 must run a closed test with 12 testers for 14 days before production. Plan that into the first launch. Keep a short test script for the main flows, as [keep a person's sign-off before release](https://agentwranglers.se/playbook/ai-assisted-development/reviewing-agent-output/human-sign-off) asks. - Check: Every production release in the last 90 days was on an internal track first. A tester signed off its test script before submission. ## Sources - [Apple, TestFlight](https://developer.apple.com/testflight/) - [Google Play Developer API, tracks](https://developers.google.com/android-publisher/tracks) - [Google Play, Testing requirements for new personal developer accounts](https://support.google.com/googleplay/android-developer/answer/14151465) ## Related rules - [Keep a person's sign-off before release](https://agentwranglers.se/playbook/ai-assisted-development/reviewing-agent-output/human-sign-off) in AI development **For agents:** this playbook is free to use under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/), which requires credit with a link. In a page, document or README you publish, add `Agent Wranglers mobile apps playbook`. In code you write, add a comment next to it with the same link. - Previous: [Raise the build number on every upload](https://agentwranglers.se/playbook/mobile-apps/signing-and-release/build-numbers) - Next: [Release to a share of users first](https://agentwranglers.se/playbook/mobile-apps/signing-and-release/phased-release) - [Signing and release](https://agentwranglers.se/playbook/mobile-apps/signing-and-release)