# Caffeine Level Tracker & Calc — Half Life & Sleep Cutoff Clock

> Half Life & Sleep Cutoff Clock (iPhone/iPad app by Seulki Eom.)

- Source: https://appshunter.io/ios/app/caffeine-level-tracker-and-calc/id6778823481 (this page in markdown: same URL + `.md`)
- Developer: [Seulki Eom](https://appshunter.io/developer/1718927408)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 45 MB
- Languages: American English, Korean
- Released: 2026-06-15
- Data updated: 2026-08-09
- User reviews in markdown: https://appshunter.io/ios/app/caffeine-level-tracker-and-calc/id6778823481/reviews.md

## What is Caffeine Level Tracker & Calc?

Caffeine Tracker: Real-Time Half-Life & Sleep Cutoff Calculator

Love your daily coffee, espresso, or energy drinks, but worried about caffeine staying in your body at bedtime?
Caffeine Tracker is your smart personal caffeine manager. By applying scientific caffeine clearance half-life equations (approx. 5-hour half-life), it calculates your real-time body caffeine level, predicts when caffeine will completely clear, and provides a sleep cutoff time to protect your sleep quality.

Key Features
1. Real-Time Body Caffeine & Clearance Estimator: Track how much caffeine remains in your system right now and see the exact estimated time when it will be fully metabolized.
2. Sleep Cutoff Time Calculator: Input your target bedtime (e.g., 11:00 PM) to get your personalized latest safe caffeine intake time so you can fall asleep soundly.
3. Daily Intake Limit Warning: Monitor today's total caffeine intake against recommended daily limits (e.g., 400 mg for healthy adults) with instant warning alerts.
4. Quick Presets & Custom Entries: Quickly log Espresso, Americano, Latte, Energy Drinks, Cola, Green Tea, or add your own custom drink sizes and milligrams.
5. Calendar History & Intake Trends: Review your past caffeine consumption history on a visual calendar to build healthier coffee habits.

Recommended For
- Coffee lovers, students, and professionals who want to enjoy caffeine without sacrificing sleep.
- Anyone experiencing insomnia, anxiety, or restlessness from afternoon coffee or energy drinks.
- Health-conscious individuals monitoring daily caffeine limits (adults 400mg, pregnant women 200mg).

Download Caffeine Tracker today and enjoy your favorite drinks while sleeping soundly!


## Version history (last 2 releases)

### 1.0.1 — 2026-08-08

Stability improvements.

### 1.0 — 2026-06-15

No release notes.

## More apps by Seulki Eom

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- [급여계산기 - 연봉, 월급, 일당, 시급, 알바비 계산](https://appshunter.io/ios/app/id6473671138)
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- [ms clock - millisecond clock](https://appshunter.io/ios/app/ms-clock-millisecond-clock/id6473691989)
- [Monthly World Weather Forecast](https://appshunter.io/ios/app/monthly-world-weather-forecast/id6474596540)
- [연차계산기 - 연차수당, 연차일수, 연차달력, 연차관리](https://appshunter.io/ios/app/id6476457866)

All apps by Seulki Eom: https://appshunter.io/developer/1718927408

## Related topics

[caffeine tracker sleep](https://appshunter.io/ios/topics/caffeine-tracker-sleep)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-09.*