Destinies
How many successes does a test need to pass?
The rulebook's Tests section gives the success table directly.
- Destinies rulebook · Rulebook · Tests
The rulebook's table sets it by difficulty: easy needs 1 success, moderate 2, difficult 3, very difficult 4, and epic 5 to 6. A test never needs more than six successes. The app does not state the difficulty, so you judge it from the description.