How credits work
Need 12 Testers uses participation credits only. New developers get a one-time starter grant after country, time zone, and a device are set (enough for a standard first campaign). More credits are earned by completing closed tests: checkpoints plus private structured feedback. Install or opt-in alone does not earn credits. You do not buy tester packages.
Start
Complete your profile and add an Android device to receive a one-time starter grant for your first campaign.
Earn
Accept matched testing invitations, finish timed checkpoints, and submit private structured feedback. Credits release only after that completed work.
Spend
Spend participation credits to activate your own closed-testing campaign. Matching invites other developers to test your app. No public ratings or review exchanges.