Your usual, with less fuss.
Choose a drink from the catalog, use a recent entry, or enter your own caffeine amount. Keep the amount and time together.
YOUR CAFFEINE, BUT MAKE IT MAKE SENSE
Know your cups.
Find your
rhythm.
Log your caffeine. See what may still be in your system at bedtime. Track how you slept, and get to know your own patterns.
Currently in testing. iPhone via TestFlight · Android via closed testing. Public store downloads are not available yet.
Your cups. Your sleep. Your patterns.
Log a little. Learn a lot.
Caffeine estimates, clearly explained.
Sleep ratings you record.
A clearer picture of your day
From first cup to lights out.
Build a more intentional relationship with caffeine: log your cups, notice the timing, and put your bedtime and sleep diary in the same picture. A little context for the next coffee decision.
Put bedtime in the picture.
Set your bedtime and see an estimate of the caffeine remaining. Use it as context when deciding on another cup.
Notice your own patterns.
Rate your sleep from 1 to 5. Review your entries over time, with caffeine estimates and sleep ratings on separate scales in Trends.
Meet the current beta
A sleep diary.
With caffeine context.
How did you sleep? A quick rating adds the part only you know.
- Go back to any day.Browse your sleep history, add a missing rating, or edit an existing one.
- See the week more clearly.Weekly sleep averages use the days you actually rated.
- Keep the distinction clear.Caffeine is estimated. Sleep ratings are entered by you. The charts do not establish cause and effect.
Trends access depends on your app entitlement. Sleep history remains accessible without Pro. Shown here: the current testing version.
A few good questions
Clear about what DeCaf does.
Can DeCaf help me rethink my afternoon coffee?
Start by seeing how much you drink and when. DeCaf puts your caffeine timing, bedtime estimate and recorded sleep together so you can reflect on your routine. It does not measure your energy, predict how you will feel, or promise better sleep.
How are caffeine levels estimated?
DeCaf uses the caffeine amounts and times you log with a five-hour half-life model. It is an estimate, not a measurement of your body. Individual responses vary; 50 mg is a reference, not a sleep guarantee.
Does DeCaf import sleep from a health app?
The upcoming Android closed-test build 0.2.26 (38) includes optional, read-only sleep import through Health Connect. Availability to eligible testers is pending; the current Android 37 release does not include import. Imported sleep stays on this device and remains separate from your manual ratings. Earlier Android versions and the current iPhone testing version do not include import. Read how imported sleep is handled.
Can I buy Pro right now?
Apple and Google purchases are currently disabled in the beta. We will explain available plans and store-specific pricing when purchases are ready.
Where can I get help or delete my account?
Visit Support for help and account deletion instructions. Read the Privacy Policy for information about data handling.
Availability
Good habits start with a little curiosity.
DeCaf is in TestFlight and Android closed testing. Join the waitlist for a launch notification. This does not grant testing access or guarantee a launch date.