Unfortunately, if you’ve forgotten your passcode lock, your only option is to uninstall and reinstall the app. It’s important that you pick an easy-to-remember passcode when using the Passcode Lock feature.
However not all is lost! Because Passcode Lock is a Pro feature, you also have access to another key Pro feature: iCloud backup. When enabling iCloud backup, if you end up getting locked out of Streakster because of the passcode lock, iCloud backup can be used to regain all your synced progress.
We recommend enabling and retaining iCloud backup to ensure that all habit and streak data remains up-to-date. This will prevent unnecessary loss of habit and streak data if you forget your passcode.