# Prometheus vs Greenpact

The clearest difference is device support: Greenpact at 3 against Prometheus's 1. Greenpact also leads on iOS requirement (13.0 vs 16.4). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Prometheus ships an update every 3 weeks, Greenpact fortnightly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Prometheus | Greenpact |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Size | 69 MB | 26 MB |
| Requires iOS | 16.4 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Prometheus Alternative Investments, Inc](https://appshunter.io/developer/1555304912) | [Greenpact UG](https://appshunter.io/developer/1872386893) |

## What reviewers say

### Prometheus

[App page](https://appshunter.io/ios/app/prometheus-by-invitation/id6560105879)

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

**In-app purchases:** none


### Greenpact

[App page](https://appshunter.io/ios/app/greenpact/id6758341570)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Prometheus free?

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

### Is Greenpact free?

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

### Do Prometheus or Greenpact have ads?

Neither Prometheus nor Greenpact shows ads.

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

Prometheus ships an update every 3 weeks, and Greenpact fortnightly. Most recently, Prometheus was updated on October 24, 2026 and Greenpact on October 25, 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.*