# Source Book Plus vs Строй

The clearest difference is device support: Строй at 3 against Source Book Plus's 1. Строй also leads on iOS requirement (8.0 vs 12). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Source Book Plus ships an update every 3 months, Строй every 6 months. The most recent releases landed on May 16, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Source Book Plus | Строй |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Size | 67 MB | 14 MB |
| Requires iOS | 12 | **8.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Joe Petralia](https://appshunter.io/developer/553768896) | [Andrey Ratushniy](https://appshunter.io/developer/980533709) |

## What reviewers say

### Source Book Plus

[App page](https://appshunter.io/ios/app/source-book-plus/id553768893)

**Features:** macOS Compatibility

**In-app purchases:** none


### Строй

[App page](https://appshunter.io/ios/app/id994850740)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Source Book Plus free?

Source Book Plus is free to download, with no in-app purchases.

### Is Строй free?

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

### Do Source Book Plus or Строй have ads?

Neither Source Book Plus nor Строй shows ads.

### Which is updated more often, Source Book Plus or Строй?

Source Book Plus ships an update every 3 months, and Строй every 6 months. Most recently, Source Book Plus was updated on May 16, 2026 and Строй on October 3, 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.*