Caffeine Curve

Caffeine Curve

A Simpler Caffeine Tracker

4 ratings
2 reviews
Free

Details

  • Released
  • Updated
  • March 28, 2026
  • April 26, 2026

Features

Caffeine Curve screenshot #1 for iPhone
Caffeine Curve screenshot #2 for iPhone
Caffeine Curve screenshot #3 for iPhone
Caffeine Curve screenshot #4 for iPhone
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About

This app estimates your current caffeine level in real-time by analyzing dietary caffeine entries from Apple Health. It helps you understand how caffeine affects your body throughout the day, aiding decisions about intake and sleep. The interface is designed for quick, clear information.

Real-time caffeine level tracking
Caffeine absorption and elimination model
Apple Health integration
Lock Screen widget and Home Screen Widgets
Peak and sleep indicators
Personalized sensitivity profiles
Demo mode for exploration
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What's New in Caffeine Curve

2.2

April 26, 2026

Smart Notifications Stay informed without even opening the app: • Peak Alerts: Get notified exactly when your caffeine intake reaches its maximum effect. • Sleep Ready Alerts: Receive a notification the moment your caffeine levels drop below your sleep threshold. Liquid Glass Design We've overhauled the app's visuals with a premium touch: • Native Look: Main cards, buttons, and status badges on both iPhone and Apple Watch now feature a beautiful "Liquid Glass" effect, making the app feel more native and visually stunning. • Appearance Settings: You can now choose to view the app in Light Mode, Dark Mode, or follow your system settings. • New App Icons: Enjoy our updated dark and brand new tinted app icons to match your Home Screen aesthetic. Apple Watch Enhancements Your wrist just got a lot more informative: • New Complications: Added a detailed rectangular complication and a dial-top text complication that show exact times for when you will peak or be clear for sleep. • Data Freshness: Added a new freshness indicator so you always know exactly when your watch last synced with your phone. Widget & Chart Polish • Peak Watermark: We've added a helpful watermark to easily identify your peak caffeine times.

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User reviews

Great for coffee lovers! An amazing way to track your caffeine trends throughout the day.

I used to wonder how much caffeine I was actually consuming throughout the day. Once I realized coffee was starting to make me feel more sluggish instead of energized, I knew I needed better visibility. This app delivers exactly that, giving me a clear picture of my caffeine trends.

The interface is clean, the widgets are well-designed, and the addition of the Apple Watch app is a great touch. What’s been most valuable is understanding when my caffeine levels drop enough to avoid disrupting sleep, something I hadn’t thought to track until I started noticing restless nights.

It’s also helpful as a practical check, reminding me when it’s too late for another cup if I want to get to sleep at a specific time. The developer clearly put real thought into the experience, and I’m looking forward to seeing how it continues to evolve.
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Awesome service!

This app is amazing, I couldn’t find anything that followed the decay time of caffeine until this. Awesome sauce.

FAQ

How does Caffeine Curve track my caffeine?

Caffeine Curve reads dietary caffeine data directly from Apple Health. It then uses an absorption and elimination model to estimate your current active caffeine level throughout the day.

Can I see my caffeine level without opening Caffeine Curve?

Yes, Caffeine Curve offers Lock Screen widgets and Rich Home Screen Widgets that display your current caffeine levels and daily trends. Smart Complications are also available for quick glances.

Does Caffeine Curve have ads?

No, Caffeine Curve is completely ad-free. It was designed to provide a simple, clear experience without any advertisements.

How does Caffeine Curve help with sleep?

The app provides 'Peak & Sleep Indicators' to show you exactly when your caffeine levels are expected to peak and when they will drop below a personalized threshold, indicating you are cleared for sleep.

Can I customize Caffeine Curve to my body?

Yes, Caffeine Curve offers 'Unmatched Personalization' with 5 different sensitivity profiles. This allows you to match the app's decay rate to your unique body chemistry.

Is Caffeine Curve suitable for all ages?

Caffeine Curve has an age rating of 4+, indicating it is generally suitable for a wide audience. However, individual caffeine metabolism can vary significantly.

What devices does Caffeine Curve support?

Caffeine Curve is currently supported on iPhone devices. It leverages Apple Health data, making it ideal for the Apple ecosystem.

How often is Caffeine Curve updated?

The latest version of Caffeine Curve is 2.2, and it was last updated on April 26, 2026. This indicates a relatively active development cycle.