Caffeine App vs Clarity
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Caffeine App
Track your caffeine intake from various beverages and monitor your hydration levels. Visualize your caffeine curve over 24 hours and receive notifications for your optimal sleep time. Integrates with Apple Health and Apple Watch for seamless logging and data syncing.
- Log caffeine from coffee, tea, and energy drinks
- Visualize 24-hour caffeine curve
- Calculate optimal sleep time
- Track daily water intake
- Apple Watch logging and complications
- Apple Health integration
- iCloud sync
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How much caffeine is still in your body? When can you fall asleep? Are you drinking enough water? Caffeine App gives you the answers — at a glance. Caffeine Tracking • Log every coffee, tea, espresso, energy drink, or mate • Scrollable 24-hour timeline shows your caffeine curve • See how much caffeine is currently in your system • Create custom drinks with individual caffeine amounts Optimal Sleep Time • Caffeine App calculates when you're ready to sleep • Get notified when your sleep time is reached • Set your personal caffeine limit and desired sleep time Water Tracking • Track your daily water intake with personalized goals • Customizable reminders to stay hydrated • Beautiful charts for caffeine and water consumption Apple Watch • Log caffeine and water right from your wrist • Daily charts for caffeine and water • Complication shows your optimal sleep time More Features • Apple Health integration — caffeine and water entries stay in sync • iCloud sync across all your devices • Dynamic Type for optimal readability • URL scheme support
Clarity
This app helps you understand the impact of caffeine on your sleep, energy, and focus. Log your intake quickly and visualize how caffeine's half-life affects your daily cycles and nighttime rest.
- Fast caffeine logging
- Caffeine half-life tracking
- Sleep and recovery insights
- Focus and energy analysis
- Daily and weekly insights
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Clarity is the simplest way to understand caffeine's real impact on your sleep, energy, and focus. Log your intake fast and see how caffeine's half-life affects your entire day — from your 2PM coffee to your nighttime sleep cycles. • Fast caffeine logging and visualization • Caffeine half-life tracking and prediction • Athletes: see how caffeine affects your sleep and recovery • Focus and energy insights, daily and week-by-week Understand your 3PM crash. Improve your sleep by seeing your caffeine carry-over. Use caffeine deliberately, not accidentally. By using this app, you agree to Apple's Terms of Use (https://www.apple.com/legal/internet-services/itunes/dev/stdeula/) and our Privacy Policy.
Screenshots
Verdict
The clearest difference is rating: Clarity at 5.0 against Caffeine App's 4.6. Clarity also leads on review sentiment (100% vs 74%) and update cadence (every 2 weeks vs monthly). Caffeine App's advantage is ratings volume (340 vs 2) and device support (3 vs 1). On price, ads, in-app purchases and monetization model 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. Caffeine App sells 1 one-off in-app purchase and Clarity sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Clarity holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Caffeine App has 340 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 74% of Caffeine App's written reviews are positive against 100% of Clarity's.
Caffeine App ships an update monthly, Clarity every 2 weeks. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.
| Parameter | Caffeine App | Clarity |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (340 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 73.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 340 — better | 2 |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, Apple Watch, Vision Pro — better | iPhone |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 17 MB | 25 MB |
| Age rating | 4+ | 17+ |
| Developer | Oleg Mueller | Nexus Nexus |
Customer experience
Caffeine App
Clarity
Bugs and requests
Caffeine App
Reported bugs
10 issues- Sleep ready time displays current time instead of predicted sleep time
- Cannot rename custom amounts until after adding them
- Newly added custom amounts appear at bottom of list
- Health app data from third-party apps not syncing
- All presets missing in some versions
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- HealthKit integration broken in certain versions
- Shift work time differential not processed correctly
- Outdated caffeine data for Dunkin Donuts beverages
- Graphics update delays causing app unresponsiveness
- Watch app loading issues on initial launch
Requested features
20 requests- Toggle option to disable bar chart visualization
- Taller graph display area with scrolling capability
- Personalization based on body weight and metabolism
- Ounce-based measurement options for drinks
- Multi-day and historical trend analysis
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- Siri Shortcuts integration for automated logging
- Today widget for quick access
- Mood and energy level tracking
- More granular unit adjustments (fractions of shots)
- Expanded beverage library (Monster Java, Sheetz coffee, K-cups, etc.)
- Custom coffee group creation without preset requirements
- Apple Watch complications showing current caffeine levels
- Watch app graph visualization
- Headache threshold level tracking
- Future-looking graph projections
- Water consumption tracking integration
- Ability to rename custom amounts before adding
- Custom amounts appearing at top of list instead of bottom
- Shift work schedule support
- Average daily caffeine statistics
Clarity
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Caffeine App
- Unlock Pro$4.99
Clarity
- Clarity Plus - Monthly3 Days trial$2.991 Month
- Clarity Plus - Yearly$19.991 Year
Questions
Is Caffeine App free?
Is Clarity free?
Which has better reviews, Caffeine App or Clarity?
Do Caffeine App or Clarity have ads?
Which is updated more often, Caffeine App or Clarity?
Other comparisons
