CaffeineCurfew tracks how much caffeine is in your body, predicts your level at bedtime, and tells you when to stop — so coffee doesn't keep you up at night.
From your first espresso to your personal cut-off — calculated, not guessed.
Add coffee, espresso, tea, energy drinks or soda in a few taps. The app sums up the caffeine automatically.
See how much caffeine is active right now and how it breaks down — modelled with pharmacological Bateman kinetics, not rough rules of thumb.
The Cut-off tab tells you how late you can have coffee without too much caffeine still active when you fall asleep.
Everyone breaks down caffeine at a different speed. Pro adapts to your body — and gets sharper every night.
The app learns your personal caffeine half-life from your clean nights — and shows how confident it already is.
Through Apple Health, CaffeineCurfew reads sleep and heart data from the devices you already wear — Apple Watch, Oura, Whoop and any tracker that syncs to Apple Health.
See how much caffeine is still active at bedtime and how nights over your threshold affect your deep sleep.
The quick answers. Still stuck? We're one email away.
CaffeineCurfew reads your sleep and heart data through Apple Health. Make sure your wearable syncs to Apple Health, then allow CaffeineCurfew access when the app asks (or under iOS Settings → Health → Data Access & Devices → CaffeineCurfew). The app never connects to those services directly — it only reads what's already in Apple Health.
The Pro model uses your sleep data (such as deep sleep, heart rate and heart rate variability) to learn how caffeine affects your nights. Without Health access the app still tracks caffeine and your cut-off, but the personalised learning and sleep insights stay off. You decide exactly which data the app may read.
After each clean night (no alcohol, stress, illness or late exercise), the app compares its prediction with what your sleep data shows and gently adjusts your personal caffeine half-life. It takes about 30 clean nights to fully calibrate — you can watch the progress in the Learning profile.
Yes. Your health and intake data are processed on your device. CaffeineCurfew does not sell your data. See our Privacy Policy for the full details.
Subscriptions are handled by Apple. On your iPhone, open Settings → tap your name → Subscriptions → CaffeineCurfew, where you can upgrade, downgrade or cancel. The Lifetime option is a one-time purchase with no recurring charge.
Open CaffeineCurfew, go to the paywall and tap “Restore purchases”. Make sure you're signed in with the same Apple ID you used for the purchase.