# Prompting AppBook vs ReactNative Mastery By SubraAI

Prompting AppBook and ReactNative Mastery By SubraAI are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Prompting AppBook ships an update fortnightly, ReactNative Mastery By SubraAI every 3 weeks. The most recent releases landed on October 7, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Prompting AppBook | ReactNative Mastery By SubraAI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 29 MB | 120 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FaireNow](https://appshunter.io/developer/1796243447) | [Subrata Kumar Das](https://appshunter.io/developer/1802433517) |

## What reviewers say

### Prompting AppBook

[App page](https://appshunter.io/ios/app/prompting-appbook/id6746142725)

**Features:** macOS Compatibility

**In-app purchases:** none


### ReactNative Mastery By SubraAI

[App page](https://appshunter.io/ios/app/reactnative-mastery-by-subraai/id6770295508)

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

**In-app purchases:** none


## Frequently asked questions

### Is Prompting AppBook free?

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

### Is ReactNative Mastery By SubraAI free?

ReactNative Mastery By SubraAI is free to download, with no in-app purchases.

### Do Prompting AppBook or ReactNative Mastery By SubraAI have ads?

Neither Prompting AppBook nor ReactNative Mastery By SubraAI shows ads.

### Which is updated more often, Prompting AppBook or ReactNative Mastery By SubraAI?

Prompting AppBook ships an update fortnightly, and ReactNative Mastery By SubraAI every 3 weeks. Most recently, Prompting AppBook was updated on October 7, 2026 and ReactNative Mastery By SubraAI on September 27, 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.*