Focus habits pay when the timer ends. Starting one doesn't earn anything, and leaving early earns nothing.
Photo habits pay when the photo passes. If it failed, no coins. The failure screen tells you why.
Passive Income needs collecting. Health activity doesn't pay automatically. Open Passive Income and collect it. This trips up almost everyone once.
Check the date. Coins reset at midnight, local time. If you earned late last night and are looking this morning, the balance is gone as designed.
Still missing after all that? Email us with the habit and roughly when, and we'll look.