# Prometheus vs PosterMap

The clearest difference is in-app purchases: Prometheus at none against PosterMap's 3. Prometheus also leads on ads (none vs shown). PosterMap's advantage is update cadence (every 9 days vs every 3 months) and iOS requirement (15.1 vs 17.6). On price and device support there is nothing between them.

Both are free to download. PosterMap sells 3 in-app purchases, starting at $4.99 per month. Prometheus asks for nothing beyond the download.

Prometheus ships an update every 3 months, PosterMap every 9 days. The most recent releases landed on September 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Prometheus | PosterMap |
| --- | --- | --- |
| 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** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | Free | — |
| Size | 5 MB | 98 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wouter Stierhout](https://appshunter.io/developer/1454164937) | [Ali Goktas](https://appshunter.io/developer/1604433091) |

## What reviewers say

### 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


### PosterMap

[App page](https://appshunter.io/ios/app/postermap-custom-map-maker/id6760111420)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $19.99 | per year |
| Lifetime Pro Unlock | $39.99 | one-time |


## Frequently asked questions

### Is Prometheus free?

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

### Is PosterMap free?

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

### Do Prometheus or PosterMap have ads?

PosterMap shows ads; Prometheus does not.

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

Prometheus ships an update every 3 months, and PosterMap every 9 days. Most recently, Prometheus was updated on September 15, 2026 and PosterMap on September 17, 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.*