# Fb2 vs OmniPDF

The clearest difference is in-app purchases: Fb2 at none against OmniPDF's 3. OmniPDF's advantage is update cadence (every 6 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. OmniPDF sells 3 in-app purchases, starting at $3.99 per month. Fb2 asks for nothing beyond the download.

Fb2 ships an update every 3 months, OmniPDF every 6 weeks. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Fb2 | OmniPDF |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 46.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 13 MB | 17 MB |
| Requires iOS | **18.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Semyon Chertkov](https://appshunter.io/developer/541521105) | [zhentao zhang](https://appshunter.io/developer/1858942516) |

## What reviewers say

### Fb2

[App page](https://appshunter.io/ios/app/fb2-to-epub/id541521102)

Convert fb2 e-book files to ePub format directly on your iPhone or iPad. Read books in any reader app without needing extra software. Supports large archives and includes library search.

**Highlights:** FB2 to ePub conversion, Directly on iPhone/iPad, Open in any book reader, Supports compressed archives, Library search by name/author, iTunes file transfer

**Features:** macOS Compatibility

**In-app purchases:** none


### OmniPDF

[App page](https://appshunter.io/ios/app/omnipdf-batch-pdf-tools/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 Fb2 free?

Fb2 is free to download, with no in-app purchases.

### Is OmniPDF free?

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

### Do Fb2 or OmniPDF have ads?

Neither Fb2 nor OmniPDF shows ads.

### Which is updated more often, Fb2 or OmniPDF?

Fb2 ships an update every 3 months, and OmniPDF every 6 weeks. Most recently, Fb2 was updated on October 23, 2026 and OmniPDF on October 22, 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.*