# Caffeine Clock: Bedtime — Coffee, tea & energy drink log

> Coffee, tea & energy drink log (iPhone/iPad app by kazunari aoki.)

- Source: https://appshunter.io/ios/app/caffeine-clock-bedtime/id6796871272 (this page in markdown: same URL + `.md`)
- Developer: [kazunari aoki](https://appshunter.io/developer/6774180811)
- Category: Health & Fitness, Medical
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 18.0 · 6 MB
- Languages: American English, Japanese
- Released: 2026-08-04
- Data updated: 2026-08-26
- User reviews in markdown: https://appshunter.io/ios/app/caffeine-clock-bedtime/id6796871272/reviews.md

## What is Caffeine Clock?

Not how much you drank - how much is still in you now, and how much will still be there at bedtime.

One tap to log
Set up to four usual drinks and log them the moment you tap. Mistaps are undoable, and you can move a record to "1 hour ago" afterwards.

The hours you could not see
The ring at the centre - the Caffeine Halo - shows what is estimated to remain. It also shows the estimate at your bedtime and when it will be mostly gone.

Connect Health (Pro)
Compare the estimate at bedtime with your time asleep, night wakings, and next-morning HRV, using your records only. The analysis stays on this device and is never sent anywhere.

Widgets and Apple Watch
Check from the Lock Screen, Home Screen, or your watch face - and log right there. Apple Watch logs offline and syncs later without duplicates.

Two themes
Calm roast and crema tones, or a dark base with electric accents. Switch any time in Settings.

Never blames you
Days without records are not failures. No streak pressure, and notifications carry neutral wording only.

No account
No sign-in. Your records stay on your device.

Caffeine Clock Pro (one-time purchase) unlocks sleep relations, every widget, Apple Watch, custom presets, and CSV export. Logging, estimates, the calendar, and today's and weekly stats stay free.

Note: caffeine amounts shown are estimates, not measurements. Do not use them for medical, medication, or driving decisions.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Caffeine Clock Pro | $9.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2026-08-07

Tidied up how the app is described on the App Store. No changes to the app itself.

### 1.0 — 2026-08-05

No release notes.

## More apps by kazunari aoki

- [人相診断AI - 16タイプ診断](https://appshunter.io/ios/app/ai-16/id6775012372)
- [StepScape: Walk Travel Widget](https://appshunter.io/ios/app/stepscape-walk-travel-widget/id6778904496)
- [Motta? Don't-Forget Checklist](https://appshunter.io/ios/app/motta-dont-forget-checklist/id6782049972)
- [Kokoro Compass](https://appshunter.io/ios/app/kokoro-compass/id6782552223)
- [RealRep](https://appshunter.io/ios/app/realrep/id6785042959)
- [Focus Meter: Study Timer](https://appshunter.io/ios/app/focus-meter-study-timer/id6785273117)

All apps by kazunari aoki: https://appshunter.io/developer/6774180811

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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 2026-08-26.*