# Prometheus Mobile STO vs GeoMask

The clearest difference is in-app purchases: Prometheus Mobile STO at none against GeoMask's 3. Prometheus Mobile STO also leads on iOS requirement (13.0 vs 15.0). GeoMask's advantage is update cadence (every 8 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. GeoMask sells 3 in-app purchases, starting at $2.99 per month. Prometheus Mobile STO asks for nothing beyond the download.

Prometheus Mobile STO ships an update every 2 months, GeoMask every 8 days. The most recent releases landed on October 19, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Prometheus Mobile STO | GeoMask |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/geomask/id6757861381/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 34 MB | 28 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 17+ |
| Developer | [Prometheus Group, Inc](https://appshunter.io/developer/1554172551) | [FUTURE LINK NETWORK Company Limited](https://appshunter.io/developer/1811162501) |

## What reviewers say

### Prometheus Mobile STO

[App page](https://appshunter.io/ios/app/prometheus-mobile-sto/id6452803445)

**Features:** macOS Compatibility

**In-app purchases:** none


### GeoMask

[App page](https://appshunter.io/ios/app/geomask/id6757861381)

This browser extension allows users to precisely control their perceived location and time zone for websites. It offers advanced management of coordinates, flexible profiles, and automated switching based on domain rules, enhancing privacy and aiding regional content testing.

**Highlights:** Advanced location management, Flexible geolocation profiles, Automated profile switching, iCloud synchronization, Seamless Safari integration, Privacy-focused data handling

**Features:** Safari Extension

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GeoMask Pro (Monthly) | $2.99 | per month |
| GeoMask Pro (Yearly) | $6.99 | per year |
| GeoMask Pro (Lifetime) | $12.99 | one-time |


## Frequently asked questions

### Is Prometheus Mobile STO free?

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

### Is GeoMask free?

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

### Do Prometheus Mobile STO or GeoMask have ads?

Neither Prometheus Mobile STO nor GeoMask shows ads.

### Which is updated more often, Prometheus Mobile STO or GeoMask?

Prometheus Mobile STO ships an update every 2 months, and GeoMask every 8 days. Most recently, Prometheus Mobile STO was updated on October 19, 2026 and GeoMask on October 10, 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.*