# Rheba Clock vs Prometheus

The clearest difference is update cadence: Rheba Clock at daily against Prometheus's every 3 months. Rheba Clock also leads on iOS requirement (13.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rheba Clock ships an update daily, Prometheus every 3 months. The most recent releases landed on May 16, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Rheba Clock | Prometheus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/prometheus-age-clock-and-timer/id6757980278/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 months |
| Monetization | — | Free |
| Size | 0 MB | 5 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Adam Trubnikov](https://appshunter.io/developer/1746606147) | [Wouter Stierhout](https://appshunter.io/developer/1454164937) |

## What reviewers say

### Rheba Clock

[App page](https://appshunter.io/ios/app/rheba-clock/id6502721039)

**In-app purchases:** none


### Prometheus

[App page](https://appshunter.io/ios/app/prometheus-age-clock-and-timer/id6757980278)

Visualize your life as a continuously updating clock, down to 10 decimal places. Track unique milestones and explore life statistics. Available on iPhone and Apple Watch with customizable widgets and complications.

**Highlights:** Decimal age clock, Life milestone countdowns, Detailed life statistics, Apple Watch app and complications, Home and Lock Screen widgets, Live Activities support

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

**In-app purchases:** none


## Frequently asked questions

### Is Rheba Clock free?

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

### Is Prometheus free?

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

### Do Rheba Clock or Prometheus have ads?

Neither Rheba Clock nor Prometheus shows ads.

### Which is updated more often, Rheba Clock or Prometheus?

Rheba Clock ships an update daily, and Prometheus every 3 months. Most recently, Rheba Clock was updated on May 16, 2026 and Prometheus on September 15, 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.*