# CaffeineWindow — Track caffeine. Sleep easier.

> Track caffeine. Sleep easier. (iPhone/iPad app by 克朋 陈.)

- Source: https://appshunter.io/ios/app/caffeinewindow/id6761716857 (this page in markdown: same URL + `.md`)
- Developer: [克朋 陈](https://appshunter.io/developer/1885422098)
- Category: Lifestyle
- Price: $1.99
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-04-14
- Data updated: 2026-05-16
- User reviews in markdown: https://appshunter.io/ios/app/caffeinewindow/id6761716857/reviews.md

## What is CaffeineWindow?

Stop guessing whether that afternoon coffee is still affecting your night.

CaffeineWindow is a simple offline utility that helps you log caffeine intake, estimate how much caffeine is still in your system, and see when it may be safer to sleep based on your selected sensitivity.

Built for people who keep asking:
- How much caffeine is still in my body?
- Did I drink coffee too late today?
- When is my safer sleep time?

Key features:
- Quick log for coffee, espresso, tea, soda, energy drinks, and custom entries
- Estimated caffeine remaining in your system right now
- Sleep-safe countdown based on your personal threshold
- Daily intake timeline that shows what pushed bedtime later
- Adjustable sensitivity with preset or custom half-life settings
- Home Screen widgets for fast at-a-glance updates
- Local notifications when your estimated caffeine level drops below your target

Why this app is different:
- Focused on one job: caffeine timing and bedtime clarity
- Fully offline with no account required
- Fast enough to log a drink in a few taps
- Easier to reuse every day than a one-time web calculator

Important:
CaffeineWindow provides estimates only and is not medical advice. Caffeine effects vary by person, medication, body size, and health conditions.


## Version history (last 1 release)

### 1.0 — 2026-04-14

No release notes.

---

*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 2026-05-16.*