# PROMETHEUS SIS vs Grovalin

The clearest difference is update cadence: Grovalin at fortnightly against PROMETHEUS SIS's every 5 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 SIS ships an update every 5 weeks, Grovalin fortnightly. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | PROMETHEUS SIS | Grovalin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Size | 133 MB | 16 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Prometheus School](https://appshunter.io/developer/1607651940) | [SohGrow](https://appshunter.io/developer/6790068114) |

## What reviewers say

### PROMETHEUS SIS

[App page](https://appshunter.io/ios/app/prometheus-sis/id6450706664)

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

**In-app purchases:** none


### Grovalin

[App page](https://appshunter.io/ios/app/grovalin/id6790068112)

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

**In-app purchases:** none


## Frequently asked questions

### Is PROMETHEUS SIS free?

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

### Is Grovalin free?

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

### Do PROMETHEUS SIS or Grovalin have ads?

Neither PROMETHEUS SIS nor Grovalin shows ads.

### Which is updated more often, PROMETHEUS SIS or Grovalin?

PROMETHEUS SIS ships an update every 5 weeks, and Grovalin fortnightly. Most recently, PROMETHEUS SIS was updated on October 12, 2026 and Grovalin on October 3, 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.*