Cutoff
Caffeine cutoff calculator. Tells you the latest time you can have coffee and still sleep tonight, with the day's caffeine curve and a countdown.
Support
Questions, bugs or ideas: email mattbusel@gmail.com and you'll get a reply from the developer.
Cutoff is a planning tool built on published population averages. It is not medical advice. If you are pregnant, take medication or have a health condition, ask your doctor.
Cutoff is a free download with one optional in-app purchase, Cutoff Pro, a one-time unlock. To restore it on a new phone, tap Restore purchase on the Pro card inside the app.