# Wristly vs Caffeine Rhythm

The clearest difference is in-app purchases: Wristly at none against Caffeine Rhythm's 2. Wristly also leads on ads (none vs shown) and iOS requirement (15.6 vs 17.0). Caffeine Rhythm's advantage is update cadence (every 3 weeks vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Caffeine Rhythm sells 2 in-app purchases, starting at $1.99 per month. Wristly asks for nothing beyond the download.

Wristly ships an update every 2 months, Caffeine Rhythm every 3 weeks. The most recent releases landed on October 8, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Wristly | Caffeine Rhythm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/caffeine-rhythm/id6756790180/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 39 MB | 23 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Sven Marc Holenstein](https://appshunter.io/developer/1794762143) | [Hatching Point LLC](https://appshunter.io/developer/1860158157) |

## What reviewers say

### Wristly

[App page](https://appshunter.io/ios/app/wristly/id6742909054)

**Features:** macOS Compatibility

**In-app purchases:** none


### Caffeine Rhythm

[App page](https://appshunter.io/ios/app/caffeine-rhythm/id6756790180)

Track your caffeine intake and understand its impact on your body. This app calculates your real-time caffeine levels and predicts when you'll be able to sleep, helping you optimize your daily consumption for better rest.

**Highlights:** Real-time caffeine decay tracking, Personalized half-life calculation, Sleep safety countdown, Coffee shop menu integration, Streak tracking and gamification, Apple Watch app with complications, Home Screen and Lock Screen widgets, HealthKit integration

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $1.99 | per month |
| Yearly Premium | $9.99 | per year |


## Frequently asked questions

### Is Wristly free?

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

### Is Caffeine Rhythm free?

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

### Do Wristly or Caffeine Rhythm have ads?

Caffeine Rhythm shows ads; Wristly does not.

### Which is updated more often, Wristly or Caffeine Rhythm?

Wristly ships an update every 2 months, and Caffeine Rhythm every 3 weeks. Most recently, Wristly was updated on October 8, 2026 and Caffeine Rhythm on October 10, 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.*