# Sterop vs ZeroBooks Reader

The clearest difference is price: Sterop at Free against ZeroBooks Reader's $9.99. ZeroBooks Reader's advantage is in-app purchases (none vs 2) and update cadence (every 5 days vs every 3 weeks). On ads, device support and iOS requirement there is nothing between them.

Sterop is free to download; ZeroBooks Reader costs $9.99 up front. Sterop sells 2 in-app purchases, starting at $1.99 per month. ZeroBooks Reader asks for nothing beyond the download.

Sterop ships an update every 3 weeks, ZeroBooks Reader every 5 days. The most recent releases landed on September 30, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Sterop | ZeroBooks Reader |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Size | 64 MB | 666 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [STEROP PRODUKSIYON VE YAZILIM SANAYI TICARET LIMITED SIRKETI](https://appshunter.io/developer/1748770875) | [MERIC KARACA](https://appshunter.io/developer/1896608961) |

## What reviewers say

### Sterop

[App page](https://appshunter.io/ios/app/sterop/id6479250105)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $1.99 | per month |
| Annual Premium | $19.99 | per year |


### ZeroBooks Reader

[App page](https://appshunter.io/ios/app/zerobooks-reader/id6799654454)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sterop free?

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

### Is ZeroBooks Reader free?

ZeroBooks Reader costs $9.99, with no in-app purchases.

### Do Sterop or ZeroBooks Reader have ads?

Neither Sterop nor ZeroBooks Reader shows ads.

### Which is updated more often, Sterop or ZeroBooks Reader?

Sterop ships an update every 3 weeks, and ZeroBooks Reader every 5 days. Most recently, Sterop was updated on September 30, 2026 and ZeroBooks Reader on October 13, 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.*