12 is a floor, not a target
Google’s requirement is a minimum of 12 testers. Treating it as a target is the single most common strategy mistake we see.
The math of dropouts
In any two-week window, a percentage of testers will drop out — they change phones, get busy, or just stop opening the app. If you started with exactly 12, the first dropout takes you below the requirement and resets your 14-day clock.
How much buffer is enough?
We recommend 15–20 testers for a smooth run:
- Absorbs 2–3 natural dropouts
- Keeps engagement metrics healthy
- Means one bad tester never sinks the test
The bottom line
Extra testers cost a little more but save weeks of re-running a failed test. When your entire launch depends on one 14-day window, a buffer is the cheapest insurance you can buy.
12 is a floor, not a target
Google’s requirement is a minimum of 12 testers. Treating it as a target is the single most common strategy mistake we see.
The math of dropouts
In any two-week window, a percentage of testers will drop out — they change phones, get busy, or just stop opening the app. If you started with exactly 12, the first dropout takes you below the requirement and resets your 14-day clock.
How much buffer is enough?
We recommend 15–20 testers for a smooth run:
- Absorbs 2–3 natural dropouts
- Keeps engagement metrics healthy
- Means one bad tester never sinks the test
The bottom line
Extra testers cost a little more but save weeks of re-running a failed test. When your entire launch depends on one 14-day window, a buffer is the cheapest insurance you can buy.
12 is a floor, not a target
Google’s requirement is a minimum of 12 testers. Treating it as a target is the single most common strategy mistake we see.
The math of dropouts
In any two-week window, a percentage of testers will drop out — they change phones, get busy, or just stop opening the app. If you started with exactly 12, the first dropout takes you below the requirement and resets your 14-day clock.
How much buffer is enough?
We recommend 15–20 testers for a smooth run:
- Absorbs 2–3 natural dropouts
- Keeps engagement metrics healthy
- Means one bad tester never sinks the test
The bottom line
Extra testers cost a little more but save weeks of re-running a failed test. When your entire launch depends on one 14-day window, a buffer is the cheapest insurance you can buy.
12 is a floor, not a target
Google’s requirement is a minimum of 12 testers. Treating it as a target is the single most common strategy mistake we see.
The math of dropouts
In any two-week window, a percentage of testers will drop out — they change phones, get busy, or just stop opening the app. If you started with exactly 12, the first dropout takes you below the requirement and resets your 14-day clock.
How much buffer is enough?
We recommend 15–20 testers for a smooth run:
- Absorbs 2–3 natural dropouts
- Keeps engagement metrics healthy
- Means one bad tester never sinks the test
The bottom line
Extra testers cost a little more but save weeks of re-running a failed test. When your entire launch depends on one 14-day window, a buffer is the cheapest insurance you can buy.