# Gemma vs Sentinel Origin

The clearest difference is in-app purchases: Gemma at none against Sentinel Origin's 4. Sentinel Origin's advantage is update cadence (every 2 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sentinel Origin sells 4 in-app purchases, starting at $39.99 per year. Gemma asks for nothing beyond the download.

Gemma ships an update every 3 weeks, Sentinel Origin every 2 days. The most recent releases landed on September 22, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Gemma | Sentinel Origin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Size | 31 MB | 40 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gemma-Design](https://appshunter.io/developer/1784261389) | [Valiexa LLC](https://appshunter.io/developer/1878068446) |

## What reviewers say

### Gemma

[App page](https://appshunter.io/ios/app/gemma-app/id6739215260)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sentinel Origin

[App page](https://appshunter.io/ios/app/sentinel-origin/id6792452317)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $39.99 | per year |
| Items Under 500 | $4.99 | one-time |
| Item Under 1000 | $9.99 | one-time |
| Item Above 1000 | $17.99 | one-time |


## Frequently asked questions

### Is Gemma free?

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

### Is Sentinel Origin free?

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

### Do Gemma or Sentinel Origin have ads?

Neither Gemma nor Sentinel Origin shows ads.

### Which is updated more often, Gemma or Sentinel Origin?

Gemma ships an update every 3 weeks, and Sentinel Origin every 2 days. Most recently, Gemma was updated on September 22, 2026 and Sentinel Origin on September 9, 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.*