# Prometheus vs Cayman Summit

The clearest difference is update cadence: Prometheus at every 3 weeks against Cayman Summit's every 6 weeks. 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.

Prometheus ships an update every 3 weeks, Cayman Summit every 6 weeks. The most recent releases landed on August 10, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Prometheus | Cayman Summit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 63 MB | 66 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Prometheusalts](https://appshunter.io/developer/1555304912) | [Dart Enterprises Ltd](https://appshunter.io/developer/1314615612) |

## 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


### Cayman Summit

[App page](https://appshunter.io/ios/app/cayman-summit/id6749318426)

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

**In-app purchases:** none


## Frequently asked questions

### Is Prometheus free?

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

### Is Cayman Summit free?

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

### Do Prometheus or Cayman Summit have ads?

Neither Prometheus nor Cayman Summit shows ads.

### Which is updated more often, Prometheus or Cayman Summit?

Prometheus ships an update every 3 weeks, and Cayman Summit every 6 weeks. Most recently, Prometheus was updated on August 10, 2026 and Cayman Summit on September 8, 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.*