Permille

BAC, caffeine & water

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Alcohol, caffeine or both — your call. Keep your BAC in view, track caffeine until bedtime, remember the water. All local, no account. Permille keeps track of what you drink — and how it affects you. Use it for alcohol only, for caffeine only, or for both. It follows your lead: drink coffee in the morning and you see the caffeine reading. Go out at night and you see your blood-alcohol level. Do both and you see both, side by side. No competition, no encouragement — just overview and care. ALCOHOL IN VIEW • Blood-alcohol estimate using the Widmark formula — with a traffic-light status and estimated time back to 0.0 ‰. • The value rises gradually while you drink and comes down naturally — across midnight, too. • Water guidance: alcohol is dehydrating — the app shows how much water still helps and gently reminds you. • When it gets heavy, you get tips for getting home safely. CAFFEINE IN VIEW • How much caffeine is in you right now — calculated from its half-life, not just added up. • The answer that matters: when you can fall asleep well again, and when it has fully worn off. • A heads-up when you go past the 400 mg daily guideline. • Coffee, espresso, cappuccino, latte, cold brew, matcha, tea, cola, mate and the common energy drinks in the usual sizes — each with and without sugar. BOTH TOGETHER • Vodka Energy or an Espresso Martini? The app works out alcohol and caffeine separately from the same drink. • Worth knowing: caffeine masks tiredness, not the alcohol. The app says so whenever both are in play. • A coffee never counts as alcohol — your dry days and stamp card stay untouched. ALSO INSIDE • Daily totals: alcohol, caffeine, sugar, calories and cost. • Mixer: build your own drinks from an ingredient library and see every value live. • History & stats: your evening's curve, weekly and monthly figures, spending and patterns. • Optional breathalyzer cross-check, Apple Health sync and Home/Lock-Screen widgets. MINDFUL, NOT ENCOURAGING Permille is built for harm reduction: water, breaks and nutrition transparency come first. There is no ranking and no reward for drinking. YOUR DATA STAYS WITH YOU Your entries are stored locally only. No account, no ads. Anonymous usage statistics (can be turned off) help improve the app. IMPORTANT Blood-alcohol and caffeine values are rough estimates, NOT a measuring device. Use at your own risk, without warranty. Never use it as a basis for driving — 0.0 ‰ always applies behind the wheel. It does not replace medical advice. For adults only. Excessive alcohol consumption harms your health.

Ratings & Reviews

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New in 1.1: caffeine tracking • Alongside your blood-alcohol level you now see how much caffeine is in you — calculated from its half-life • History can switch between alcohol per day and caffeine per day • Caffeine as its own daily total — next to alcohol, sugar, calories and cost • When you can fall asleep well again, and when the caffeine has fully worn off • A heads-up when you pass 400 mg in a day • Over 40 new drinks: coffee, espresso, cappuccino, latte, cold brew, matcha, tea, cola, mate and the common energy drinks in 0.25 / 0.33 / 0.5 L — with and without sugar • Vodka Energy and Espresso Martini now work out alcohol and caffeine separately • A coffee never counts as alcohol: dry days and stamp card stay untouched • The caffeine display appears the moment you log a drink and shows where it is heading • More realistic drinking times: a shot is in right away, half a litre takes its time • Pages can no longer be pushed sideways by accident • Scan a barcode: recognise the drink and take over its nutrition values • Outlook: work out when you'd be back at 0.0 ‰ and from when you can fall asleep • Caffeine curve in the daily view, on the same time axis as the blood-alcohol curve • Drag a finger across the curves to read the values at any moment • Every drink tile shows how much ‰ it adds for your body • A note while a drink is still being absorbed: where the value is heading • Search in the quick picks, and an arrow that moves a drink to the top • Suggest an improvement and report a problem straight from your profile

Version 1.1

The developer, Johann Brockstedt, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Johann Brockstedt
Size
  • 5.8 MB
Category
  • Health & Fitness
Compatibility
Requires iOS 16.0 or later.
  • iPhone
    Requires iOS 16.0 or later.
  • Mac
    Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 20 more
  • English, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Romanian, Slovak, Slovenian, Spanish, Swedish
Age Rating
18+
  • 18+
  • Learn More
  • Frequent
    Alcohol, Tobacco, Drug Use or References

    Contains
    Health or Wellness Topics
Copyright
  • © 2026 Johann Brockstedt
  • Developer Website
  • Privacy Policy

    • More by Johann Brockstedt

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