# CountDown vs Prometheus

The clearest difference is ads: Prometheus at none against CountDown's shown. CountDown's advantage is update cadence (monthly vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

CountDown ships an update monthly, Prometheus every 3 months. The most recent releases landed on October 25, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | CountDown | 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 | Yes | **No** |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | — | Free |
| Size | 4 MB | 5 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Ali Murad](https://appshunter.io/developer/1412644468) | [Wouter Stierhout](https://appshunter.io/developer/1454164937) |

## What reviewers say

### CountDown

[App page](https://appshunter.io/ios/app/countdown-days-and-events/id6736585997)

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

**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 CountDown free?

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

### Is Prometheus free?

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

### Do CountDown or Prometheus have ads?

CountDown shows ads; Prometheus does not.

### Which is updated more often, CountDown or Prometheus?

CountDown ships an update monthly, and Prometheus every 3 months. Most recently, CountDown was updated on October 25, 2026 and Prometheus on October 19, 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.*