# Keras Chatbot vs By0

The clearest difference is in-app purchases: By0 at none against Keras Chatbot's 9. By0 also leads on ads (none vs shown) and update cadence (every 3 days vs every 3 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Keras Chatbot sells 9 in-app purchases, starting at $1.99 per month. By0 asks for nothing beyond the download.

Keras Chatbot ships an update every 3 weeks, By0 every 3 days. Both last shipped on November 8, 2026.

## The numbers

| Metric | Keras Chatbot | By0 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 276 MB | 25 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YIN MA](https://appshunter.io/developer/1761110940) | [6ix USA Inc](https://appshunter.io/developer/1648893338) |

## What reviewers say

### Keras Chatbot

[App page](https://appshunter.io/ios/app/keras-chatbot-voice-assistant/id6608969280)

**Features:** Family Sharing

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Base Subscription | $1.99 | per month |
| Professional Subscription | $4.99 | per month |
| Premium Subscription | $8.99 | per month |
| Ultimate Subscription | $12.99 | per month |
| Base Subscription Year | $19.99 | per year |
| Professional Subscription Year | $49.99 | per year |
| Premium Subscription Year | $89.99 | per year |
| Ultimate Subscription Year | $119.99 | per year |
| A small pile of gold coins | $0.99 | one-time |


### By0

[App page](https://appshunter.io/ios/app/by0-ai-chat-assistant/id6741533659)

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

**In-app purchases:** none


## Frequently asked questions

### Is Keras Chatbot free?

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

### Is By0 free?

By0 is free to download, with no in-app purchases.

### Do Keras Chatbot or By0 have ads?

Keras Chatbot shows ads; By0 does not.

### Which is updated more often, Keras Chatbot or By0?

Keras Chatbot ships an update every 3 weeks, and By0 every 3 days. Most recently, Keras Chatbot was updated on November 8, 2026 and By0 on November 8, 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.*