Stimly: Caffeine Tracker

Time coffee around your sleep

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Stimly tracks your caffeine live and shows the hour of your last cup — the one that still leaves you a good night. Coffee works differently for everyone — and costs everyone different sleep. Stimly estimates when your caffeine has dropped far enough to stop getting in your way at bedtime. Most caffeine apps just count milligrams. Stimly models how caffeine actually moves through your body — using a science-backed metabolism engine calibrated to your age, weight, sensitivity and habits. YOUR DAY AT A GLANCE • Live caffeine level — a real-time curve of what's active in your system now • Drinking now — log slow sips (yerba mate, big lattes) and watch absorption live • Sleep forecast — see when your body will be ready for quality sleep • Smart advice — gentle nudges when one more espresso would cost you tonight TRACK WITHOUT FRICTION • One-tap logging from your personal drinks library • Barcode scanner for bottled drinks • Daily limit with a clear budget bar (including a lower preset during pregnancy) • Symptom journal — connect how you feel to what you drank • 7-day history of everything you've logged STIMLY PRO — OPTIONAL PAID UPGRADE Everything above is free. These extras require Stimly Pro: • Tolerance tracking — see habituation build and fade week to week • Expert mode — brew method and dry mass for precision logging • Extended history — month and 90-day views • 30-day wellness export — a clean PDF of your patterns SUBSCRIPTION OR ONE-TIME PURCHASE You can get Stimly Pro in two ways: • A monthly subscription that renews automatically. • Open-ended access: one payment, no renewals, no free trial. It lasts as long as we run the Stimly service. If we end the service within 36 months of your purchase, we refund at least a proportional part of the price. See the Terms for details. Your local price is shown in the app before you buy. Payment is charged to your Apple Account at confirmation. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period — manage or cancel any time in your Apple Account settings. Buying open-ended access does not cancel an active subscription. PRIVATE BY DESIGN Your data stays yours. No ads, no tracking across apps, no data selling. Stimly is a wellness tool for healthy adults. It is not a medical device and does not provide medical advice — for health concerns, talk to your doctor. Terms: https://stimly.app/terms · Privacy: https://stimly.app/privacy

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What's new in Stimly 1.0.6: - Now in 7 Languages Stimly now speaks Spanish, German, French, Italian and Brazilian Portuguese, alongside English and Polish. - Faster Logging Tap the plus and your recent drinks fan out right above it, ready to log in one more tap. - Pick Your Widget Drink In widget settings, choose which drink the log button records: one of up to 8 drinks from the last 21 days, or Automatic. - Latte Light Theme The light theme now has a soft latte-beige background, with matching fields and borders. - Favorites by Frequency Favorite drink tiles are now ordered by how often you logged each drink in the last 30 days. What's more: - Bug fixes and general improvements.

Version 1.0.6

The developer, Zen Media Mateusz Stys, 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 Linked to You

    The following data may be collected and linked to your identity:

    • Health & Fitness
    • Purchases
    • Contact Info
    • Identifiers
    • Sensitive Info

  • Data Not Linked to You

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

    • Usage Data
    • Diagnostics

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
Zen Media Mateusz Stys
Size
64.9 MB
Category
Health & Fitness
Compatibility
Requires iOS 16.4 or later.
  • iPhone
    Requires iOS 16.4 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 6 more
  • English, French, German, Italian, Polish, Portuguese, Spanish
Age Rating
9+
In-App Purchases
Yes
  • Stimly Pro Lifetime $29.99
  • Stimly Pro Yearly $39.99
  • Stimly Pro Monthly $4.99
  • Learn More
Copyright
© 2026 Zen Media
  • Developer Website
  • Privacy Policy

    • More by Zen Media Mateusz Stys

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