186mg today
Know where you stand
Two live gauges show what you have consumed today and how much is still active in your body.
MyCaffeine
Version 1.2.2 Available now ↗Caffeine, without the guesswork
Know exactly where you stand.
Log a drink. See how much caffeine is still in your body, what will be left at bedtime, and how it lines up with your sleep.
45 mingradual absorption model
9supported languages
10Health Analysis metrics
Localyour logs stay on device
The numbers that matter
A clearer answer to “one more?”
MyCaffeine turns every drink into a live, personal view of the rest of your day.
49mg at 22:30
Will this keep you up?
Check your bedtime projection and time to clear before you pour the next one.
Your caffeine vs your sleep
Compare your own caffeine history with sleep, heart and activity data from Apple Health.
Health Analysis · Pro
Findings, not just charts.
Every dot is one day of your own data. MyCaffeine looks for the pattern, then explains the result in plain English—without turning correlation into a medical claim.
Sleep
Duration · Efficiency · Time to fall asleep
Heart
Resting HR · HRV · Walking heart rate · Blood pressure
Activity
Respiratory rate · Steps · Active energy
Built for Apple HealthUses health data already stored on your iPhone. Analysis happens on your device.
Branded catalogueView live coverage ↗
Thousandsof real drinks and serving sizes
EspressoTeaEnergy drinksSoft drinksNespressoYour favourites
Region-awareSee products available where you live.
Source-backedPublic references sit behind the figures.
One-tap recentYour last serving size is remembered.
A drink list that feels familiar
Real drinks. Your usual order.
Search a researched branded catalogue, create your flat white once, or log caffeine and water directly. Recent drinks rise to the top so the next log takes seconds.
How it works
Your coffee doesn’t hit all at once.
MyCaffeine models a gradual rise, then the long tail your body clears over time.
11:30Drink logged
12:15Absorption peak
17:15Half remains
Now+3h+6h+9h+12h
1Gradual absorption
Caffeine ramps in over roughly 45 minutes using a smooth absorption curve.
2Half-life decay
What is absorbed then falls exponentially using your personal half-life setting.
3Your projection
See your estimated level now, at bedtime and when you are expected to clear it.
MyCaffeine is an informational tracker, not a medical device.
New in 1.2 · Your day, everywhere
On your wrist. On your Lock Screen. In Apple Health.
Check your level, log a drink or add water without opening the iPhone app. Complications and widgets keep the next useful number close.
- Standalone Apple Watch app with synced status
- Home Screen and Lock Screen widgets
- Quick Add shortcuts and Siri/App Intents
- Optional two-way Apple Health sync
Caffeine and hydration
Water comes along for the ride.
A suggested or manual daily goal, a rolling 24-hour graph, hydration status and optional Apple Health sync.
Tuned to your body
Everyone clears caffeine differently.
Set limits directly or use an optional questionnaire to personalise your estimated half-life, daily limit and bedtime target.
Half-life5h 30mDaily limit400 mg
Smart reminders · Pro
Reminders that learn.
MyCaffeine learns when you usually drink, nudges around those times, and stays quiet while you sleep.
09:2613:1015:30
Private by design
Your habits are yours.
Your drink and water history lives locally on your device. Health data is processed on-device, not sent to MyCaffeine servers, analytics or advertisers.
Read the privacy policy ↗01No account required
Start tracking without creating a profile or handing over an email address.
02Health stays on device
Apple Health data is used locally for tracking, calculations and analysis.
03Export when you want
Create CSV or JSON exports locally over the timeframe you choose.
04Consent first
Analytics is disabled by default and advertising consent controls are shown where required.
Free to start
Go deeper with MyCaffeine Pro.
Start free with everyday drinks and core tracking. Pro adds the full branded catalogue, health insights and faster ways to log.
FeatureFreePro
Home gauges, prediction, history & trends✓✓
Custom drinks, caffeine, water & data export✓✓
Apple Health caffeine & water sync✓✓
Starter Drinks and free catalogue drinks✓✓
Full branded drink catalogue—✓
Health Analysis—✓
Smart notifications—✓
Log from Watch and widgets—✓
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Live pricing and purchase terms are shown in the App Store and in the app.
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