# Clarity vs Caffeine Clock

The clearest difference is in-app purchases: Caffeine Clock at none against Clarity's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Clarity sells 2 in-app purchases, starting at $2.99 per month. Caffeine Clock asks for nothing beyond the download.

Clarity ships an update every 2 weeks, Caffeine Clock every 3 weeks. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Clarity | Caffeine Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/clarity-caffeine-tracker/id6748916921/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Freemium | — |
| Size | 25 MB | 3 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 12+ |
| Developer | [Nexus Nexus](https://appshunter.io/developer/1826114678) | [BEN LUKE SPINK](https://appshunter.io/developer/1867615562) |

## What reviewers say

### 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 |


### Caffeine Clock

[App page](https://appshunter.io/ios/app/caffeine-clock/id6757563556)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Clarity free?

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

### Is Caffeine Clock free?

Caffeine Clock is free to download, with no in-app purchases.

### Do Clarity or Caffeine Clock have ads?

Neither Clarity nor Caffeine Clock shows ads.

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

Clarity ships an update every 2 weeks, and Caffeine Clock every 3 weeks. Most recently, Clarity was updated on October 16, 2026 and Caffeine Clock on October 5, 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.*