# Caffeine Clock vs Clarity

The clearest difference is monetization model: Caffeine Clock at free against Clarity's freemium. Caffeine Clock also leads on ratings volume (27 vs 2) and iOS requirement (16.4 vs 18.0). Clarity's advantage is rating (5.0 vs 4.7) and review sentiment (100% vs 80%). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Caffeine Clock sells 2 one-off in-app purchases 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 4.7. That said, the two scores are not equally well evidenced: Caffeine Clock has 27 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 80% of Caffeine Clock's written reviews are positive against 100% of Clarity's.

Caffeine Clock ships an update weekly, Clarity every 2 weeks. The most recent releases landed on October 20, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Caffeine Clock | Clarity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (27 ratings)](https://appshunter.io/ios/app/caffeine-clock-track-caffeine/id6504160396/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/clarity-caffeine-tracker/id6748916921/reviews)** |
| Number of ratings | **27** | 2 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | **Free** | Freemium |
| Size | 121 MB | 25 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [ANTONIN WINGENDER](https://appshunter.io/developer/1751178342) | [Nexus Nexus](https://appshunter.io/developer/1826114678) |

## What reviewers say

### Caffeine Clock

[App page](https://appshunter.io/ios/app/caffeine-clock-track-caffeine/id6504160396)

This app helps you track your caffeine intake and understand its impact on your sleep. It models caffeine absorption and half-life to provide a clear view of your current and projected levels, allowing you to plan your consumption for better rest.

**Highlights:** Caffeine absorption and half-life modeling, Real-time caffeine level tracking, Interactive home screen widgets, Sleep-aware insights and bedtime planning, Extensive drink database with custom options, Daily caffeine threshold alerts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $4.99 | one-time |
| Remove Ads | $9.99 | one-time |


### 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 Clock free?

Caffeine Clock 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 Clock or Clarity?

Clarity is rated higher. Caffeine Clock averages 4.7 out of 5 from 27 ratings, while Clarity averages 5.0 from 2 ratings.

### Do Caffeine Clock or Clarity have ads?

Neither Caffeine Clock nor Clarity shows ads.

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

Caffeine Clock ships an update weekly, and Clarity every 2 weeks. Most recently, Caffeine Clock was updated on October 20, 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.*