# TCHACOLive vs Blunder Zero

The clearest difference is update cadence: Blunder Zero at every 6 weeks against TCHACOLive's every 13 months. Blunder Zero also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

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

TCHACOLive ships an update every 13 months, Blunder Zero every 6 weeks. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | TCHACOLive | Blunder Zero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/blunder-zero-chess-coach/id6781985793/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 6 weeks** |
| Monetization | — | Free |
| Size | 70 MB | 260 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Racemap GmbH](https://appshunter.io/developer/1480716603) | [SocialPlay AI](https://appshunter.io/developer/1721115242) |

## What reviewers say

### TCHACOLive

[App page](https://appshunter.io/ios/app/tchacolive/id6467015463)

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

**In-app purchases:** none


### Blunder Zero

[App page](https://appshunter.io/ios/app/blunder-zero-chess-coach/id6781985793)

This app analyzes your chess games to identify recurring mistakes and weak habits. It then creates personalized training drills based on your actual blunders and missed tactics, helping you improve by focusing on patterns that cost you games. Analysis runs on-device for speed and privacy.

**Highlights:** Personal game review with move-by-move feedback, Train from your own blunders and mistakes, Human-like insight with Maia and Stockfish, Real-time chess coach feedback, Recurring mistake tracking, Opening repertoire tracking, On-device Stockfish analysis

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

**In-app purchases:** none


## Frequently asked questions

### Is TCHACOLive free?

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

### Is Blunder Zero free?

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

### Do TCHACOLive or Blunder Zero have ads?

Neither TCHACOLive nor Blunder Zero shows ads.

### Which is updated more often, TCHACOLive or Blunder Zero?

TCHACOLive ships an update every 13 months, and Blunder Zero every 6 weeks. Most recently, TCHACOLive was updated on October 15, 2026 and Blunder Zero on October 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.*