# Caffeine App vs Clarity

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.

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.

## The numbers

| Metric | Caffeine App | Clarity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (340 ratings)](https://appshunter.io/ios/app/caffeine-app-daily-tracker/id1045959983/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/clarity-caffeine-tracker/id6748916921/reviews)** |
| Number of ratings | **340** | 2 |
| Positive reviews | 73.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 17 MB | 25 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | **iPhone, Apple Watch, Vision Pro** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Oleg Mueller](https://appshunter.io/developer/367875607) | [Nexus Nexus](https://appshunter.io/developer/1826114678) |

## What reviewers say

### Caffeine App

[App page](https://appshunter.io/ios/app/caffeine-app-daily-tracker/id1045959983)

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.

**Highlights:** 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

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $4.99 | one-time |

**What reviewers like**

- 👍 Easy to use and intuitive interface
- 🎯 Accurate caffeine tracking and decay calculations
- ⏰ Helpful sleep readiness predictions
- 🏥 Apple Health integration for long-term tracking
- ⌚ Apple Watch support with quick logging

**What reviewers complain about**

- ⚠️ Recent performance degradation from new features
- 📊 Graphs become too small with multiple charts enabled
- ⏳ Long graphics update delays affecting responsiveness
- 🐛 Sleep ready time shows current time instead of prediction
- 🌍 Limited beverage library for non-German markets

**Reported bugs**

- 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

**Requested features**

- 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


### Clarity

[App page](https://appshunter.io/ios/app/clarity-caffeine-tracker/id6748916921)

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.

**Highlights:** Fast caffeine logging, Caffeine half-life tracking, Sleep and recovery insights, Focus and energy analysis, Daily and weekly insights

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Clarity Plus - Monthly | $2.99 | per month |
| Clarity Plus - Yearly | $19.99 | per year |


## Frequently asked questions

### Is Caffeine App free?

Caffeine App is free to download, with in-app purchases available.

### Is Clarity free?

Clarity is free to download, with in-app purchases available.

### Which has better reviews, Caffeine App or Clarity?

Clarity is rated higher. Caffeine App averages 4.6 out of 5 from 340 ratings, while Clarity averages 5.0 from 2 ratings.

### Do Caffeine App or Clarity have ads?

Neither Caffeine App nor Clarity shows ads.

### Which is updated more often, Caffeine App or Clarity?

Caffeine App ships an update monthly, and Clarity every 2 weeks. Most recently, Caffeine App was updated on October 15, 2026 and Clarity on October 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*