Support

How accurate are the numbers, and can I correct a drink?

Caffeine Ceiling starts from a library of caffeine amounts for common drinks, but you are in control. Every preset is editable, so if your usual cup is stronger or weaker than the default, you can set the real number. Your correction persists everywhere that drink is used, so the estimate stays true to what you actually drink.

How does the "how much is in you now" curve work?

The app uses a pharmacokinetic model: each drink adds caffeine that then clears from your system over time, following a half-life. We show the live amount in your system now and project where you are headed later in the day against your daily limit and your sleep-safe threshold. You can adjust the half-life to match how quickly your body clears caffeine.

Is this medical advice?

No. The numbers are an estimate from a model, not a diagnosis or medical advice. The half-life and your limits are adjustable to fit you. For a specific limit that matters to your health, such as the roughly 200 mg per day often suggested during pregnancy, talk to your doctor and set your limit accordingly.

Do you see my data?

No. Your caffeine log lives on your device. There is no account system and no server for your caffeine data, so there is nothing for us to see. We have no way to access what you log.

Does it need Apple Health?

No. Apple Health is optional and the app works fully without it. If you choose to connect Health, the app can write your logged caffeine to your health record and, for unlocked users who opt in, read sleep and body weight to personalize your estimates. In all cases, Health data is processed on your device and never leaves it.

Is it a subscription?

No. Caffeine Ceiling is a single one-time unlock. There is no recurring charge and no subscription tier.

How do I restore my purchase?

On the paywall, tap "Restore Purchase." Your unlock is tied to your Apple ID and transfers automatically to your other devices.

How do I get a refund?

All purchases are processed by Apple. To request a refund, visit reportaproblem.apple.com or contact Apple Support directly. We do not process payments or refunds.