CaffLog vs Caffeine Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CaffLog
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CaffLog is an app for managing your caffeine intake smartly. Easily log your daily caffeine consumption and visualize your body's caffeine levels in real time. CaffLog supports your caffeine management goals, whatever they may be. ◆ Who This App Is For 【Boost Your Performance】 For those who want to use caffeine effectively to enhance productivity at work or while studying. 【Cut Back or Limit Caffeine】 For those looking to control their intake for health reasons, pregnancy, or breastfeeding. 【Understand Sleep Impact】 For those who want to track how caffeine affects their sleep and find the right timing. 【Discover Your Patterns】 For those who want to visualize their intake trends and understand their habits objectively. ◆ Key Features 【Caffeine Intake Log】 Easily record caffeinated drinks like coffee, tea, and energy drinks. 【Real-Time Caffeine Levels】 Check your estimated current caffeine levels in your body at any time. 【Heatmap Review】 Visualize your daily intake patterns with a heatmap. Spot your trends at a glance. 【Customize Your Home Screen】 Decorate your home with cute items like coffee beans, donuts, and cookies. Choose from wood, stone, or solid backgrounds and pick your accent color to make the space truly your own. 【Cute & Easy-to-Use Design】 A warm, friendly design that makes daily logging enjoyable. ◆ CaffLog Premium (Optional) CaffLog is free to use. CaffLog Premium unlocks additional convenient features. 【CaffLog Premium】 1. Customize caffeine half-life 2. Customize decorations, backgrounds, and themes 3. Ad-free experience 【Pricing】 Monthly Plan: $2.99 Auto-renews monthly from the date of purchase. 【Auto-Renewal Details】 Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. 【Payment】 Payment will be charged to your Apple ID.
Caffeine Clock
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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.
Screenshots
Verdict
The clearest difference is ads: Caffeine Clock at none against CaffLog's shown. Caffeine Clock also leads on update cadence (every 2 days vs weekly). CaffLog's advantage is iOS requirement (15.0 vs 18.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. CaffLog sells 1 in-app purchase, starting at $2.99 per month and Caffeine Clock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
CaffLog ships an update weekly, Caffeine Clock every 2 days. The most recent releases landed on September 10, 2026 and September 8, 2026 respectively.
| Parameter | CaffLog | Caffeine Clock |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 70 MB | 6 MB |
| Age rating | 4+ | 12+ |
| Developer | Haruya Oyama | kazunari aoki |
In-app purchases
CaffLog
- CaffLog Premium7 Days trial$2.991 Month
Caffeine Clock
- Caffeine Clock Pro$9.99








