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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Stimly now has widgets! With this update, Stimly moves onto your Home Screen and Lock Screen. You can check your caffeine at a glance and log your usual drink without opening the app. What's new in Stimly 1.0.5: - Home Screen Widgets Two sizes: • Small: your estimated active caffeine in mg, a trend arrow, and the time it should fall below Stimly's bedtime level. • Medium: the same, plus a curve of your caffeine over the last 6 hours and the next 12. - Lock Screen Widgets A round and a rectangular widget with your estimated caffeine. - One-Tap Logging Tap a widget to log your usual drink. It confirms the drink once it's saved. - Faster Drink Logging Add Drink now opens with your recent drinks in a row at the top. Search and barcode scanning sit right below, and the catalog is grouped into five categories with redrawn drink icons. What's more: - Widgets adapt to tinted Home Screens and StandBy. - Bug fixes and performance improvements.

Version 1.0.5

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
60.4 MB
Category
Health & Fitness
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 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 Polish
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

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