# PayTalk™ vs Open Book AI Chat

The clearest difference is update cadence: PayTalk™ at every 10 days against Open Book AI Chat's every 2 months. Open Book AI Chat's advantage is device support (5 vs 1). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. PayTalk™ sells 4 in-app purchases, starting at $4.99 per month and Open Book AI Chat sells 1 in-app purchase, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PayTalk™ ships an update every 10 days, Open Book AI Chat every 2 months. The most recent releases landed on October 27, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | PayTalk™ | Open Book AI Chat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/open-book-ai-chat/id6446209620/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | — | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 170 MB | 54 MB |
| Requires iOS | **16.0** | 16.2 |
| Devices | iPhone | **iPhone, iPad, Mac, Apple TV, Apple Watch** |
| Age rating | 4+ | 9+ |
| Developer | [Wiscount Corporation](https://appshunter.io/developer/1561387316) | [Cat Bakery, LLC](https://appshunter.io/developer/1188110325) |

## What reviewers say

### PayTalk™

[App page](https://appshunter.io/ios/app/paytalk/id1561387314)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PayTalk™ GPT Premium | $4.99 | per month |
| PayTalk™ GPT Monthly | $9.99 | per month |
| PayTalk™ GPT Premium | $49.99 | per year |
| PayTalk™ GPT Annual | $99.99 | per year |


### Open Book AI Chat

[App page](https://appshunter.io/ios/app/open-book-ai-chat/id6446209620)

This AI chat application leverages advanced natural language processing to enhance communication and productivity. It facilitates efficient interactions with colleagues, clients, and friends for collaboration, business, or personal connections.

**Highlights:** Advanced natural language processing, Streamlined communication, Team collaboration, Client interaction, Personal messaging

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Open Book AI T1 | $3.99 | per 7 days |


## Frequently asked questions

### Is PayTalk™ free?

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

### Is Open Book AI Chat free?

Open Book AI Chat is free to download, with in-app purchases available.

### Which is updated more often, PayTalk™ or Open Book AI Chat?

PayTalk™ ships an update every 10 days, and Open Book AI Chat every 2 months. Most recently, PayTalk™ was updated on October 27, 2026 and Open Book AI Chat 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.*