# Caffeine Clock vs Caffeine Flow

The clearest difference is in-app purchases: Caffeine Flow at none against Caffeine Clock's 2. Caffeine Clock's advantage is ads (none vs shown) and update cadence (weekly vs fortnightly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Caffeine Clock sells 2 one-off in-app purchases. Caffeine Flow asks for nothing beyond the download.

Caffeine Clock ships an update weekly, Caffeine Flow fortnightly. The most recent releases landed on October 20, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Caffeine Clock | Caffeine Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (27 ratings)](https://appshunter.io/ios/app/caffeine-clock-track-caffeine/id6504160396/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Free | — |
| Size | 121 MB | 86 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ANTONIN WINGENDER](https://appshunter.io/developer/1751178342) | [Chinipy](https://appshunter.io/developer/1829955713) |

## 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 |


### Caffeine Flow

[App page](https://appshunter.io/ios/app/caffeine-flow-sleep-tracker/id6759970536)

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

**In-app purchases:** none


## Frequently asked questions

### Is Caffeine Clock free?

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

### Is Caffeine Flow free?

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

### Do Caffeine Clock or Caffeine Flow have ads?

Caffeine Flow shows ads; Caffeine Clock does not.

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

Caffeine Clock ships an update weekly, and Caffeine Flow fortnightly. Most recently, Caffeine Clock was updated on October 20, 2026 and Caffeine Flow on September 25, 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.*