# Gemma vs OmniPDF

The clearest difference is in-app purchases: Gemma at none against OmniPDF's 3. Gemma also leads on iOS requirement (15.6 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. OmniPDF sells 3 in-app purchases, starting at $3.99 per month. Gemma asks for nothing beyond the download.

Gemma ships an update every 3 weeks, OmniPDF every 6 weeks. The most recent releases landed on September 22, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Gemma | OmniPDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 31 MB | 11 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gemma-Design](https://appshunter.io/developer/1784261389) | [zhentao zhang](https://appshunter.io/developer/1858942516) |

## What reviewers say

### Gemma

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

**Features:** macOS Compatibility

**In-app purchases:** none


### OmniPDF

[App page](https://appshunter.io/ios/app/omnipdf/id6779046820)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OmniPDF Pro Monthly | $3.99 | per month |
| OmniPDF Pro Yearly | $29.99 | per year |
| OmniPDF Pro Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Gemma free?

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

### Is OmniPDF free?

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

### Do Gemma or OmniPDF have ads?

Neither Gemma nor OmniPDF shows ads.

### Which is updated more often, Gemma or OmniPDF?

Gemma ships an update every 3 weeks, and OmniPDF every 6 weeks. Most recently, Gemma was updated on September 22, 2026 and OmniPDF on September 18, 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.*