# Dozecal vs Caffeine Rhythm

The clearest difference is rating: Caffeine Rhythm at 5.0 against Dozecal's 4.2. Caffeine Rhythm also leads on update cadence (every 3 weeks vs every 10 months) and review sentiment (100% vs 75%). Dozecal's advantage is in-app purchases (none vs 2) and ads (none vs shown). 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. Dozecal asks for nothing beyond the download.

Caffeine Rhythm holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Dozecal has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of Dozecal's written reviews are positive against 100% of Caffeine Rhythm's.

Dozecal ships an update every 10 months, Caffeine Rhythm every 3 weeks. The most recent releases landed on October 29, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Dozecal | Caffeine Rhythm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/dozecal/id1521160089/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/caffeine-rhythm/id6756790180/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | **Free** | Freemium |
| Size | 27 MB | 23 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Johan Kovacs](https://appshunter.io/developer/1486605020) | [Hatching Point LLC](https://appshunter.io/developer/1860158157) |

## What reviewers say

### Dozecal

[App page](https://appshunter.io/ios/app/dozecal/id1521160089)

This educational calculator promotes the use of Base Twelve (duodecimal) in math and science. It offers standard mathematical functions in both duodecimal and decimal modes, with automatic conversion between them. It utilizes Reverse Polish Notation (RPN) for calculations.

**Highlights:** Duodecimal and Decimal modes, Automatic mode conversion, RPN (Reverse Polish Notation) input, Standard math functions, Trigonometric operations (degrees), Educational tool for Base Twelve

**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 Dozecal free?

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

### Is Caffeine Rhythm free?

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

### Which has better reviews, Dozecal or Caffeine Rhythm?

Caffeine Rhythm is rated higher. Dozecal averages 4.2 out of 5 from 5 ratings, while Caffeine Rhythm averages 5.0 from 1 ratings.

### Do Dozecal or Caffeine Rhythm have ads?

Caffeine Rhythm shows ads; Dozecal does not.

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

Dozecal ships an update every 10 months, and Caffeine Rhythm every 3 weeks. Most recently, Dozecal was updated on October 29, 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.*