# Ozone e vs LibvarMobile

The clearest difference is ads: LibvarMobile at none against Ozone e's shown. Ozone e's advantage is update cadence (monthly vs every 12 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ozone e ships an update monthly, LibvarMobile every 12 months. The most recent releases landed on October 7, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Ozone e | LibvarMobile |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 12 months |
| Monetization | Free with in-app purchases | — |
| Size | 51 MB | 28 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ozone Entertainment AD](https://appshunter.io/developer/1563403622) | [Pencho Slaveykov Public Library](https://appshunter.io/developer/1823651189) |

## What reviewers say

### Ozone e

[App page](https://appshunter.io/ios/app/ozone-e/id1563403620)

Access a vast library of Bulgarian books, both new and classic, directly on your device. Discover personalized recommendations and enjoy a free collection of titles. Organize your library with flexible filtering options.

**Highlights:** Thousands of Bulgarian books, Download books to app, Free library access, Filter by genre and author, Personalized content recommendations

**Features:** macOS Compatibility

**In-app purchases:** none


### LibvarMobile

[App page](https://appshunter.io/ios/app/libvarmobile/id6747973828)

**In-app purchases:** none


## Frequently asked questions

### Is Ozone e free?

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

### Is LibvarMobile free?

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

### Do Ozone e or LibvarMobile have ads?

Ozone e shows ads; LibvarMobile does not.

### Which is updated more often, Ozone e or LibvarMobile?

Ozone e ships an update monthly, and LibvarMobile every 12 months. Most recently, Ozone e was updated on October 7, 2026 and LibvarMobile on September 30, 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.*