# Blunder Zero vs Fenify

The clearest difference is update cadence: Fenify at weekly against Blunder Zero's every 6 weeks. Blunder Zero's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, 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.

Blunder Zero ships an update every 6 weeks, Fenify weekly. The most recent releases landed on October 8, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Blunder Zero | Fenify |
| --- | --- | --- |
| 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 6 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 260 MB | 129 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SocialPlay AI](https://appshunter.io/developer/1721115242) | [Logan Spears](https://appshunter.io/developer/6792350672) |

## What reviewers say

### 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


### Fenify

[App page](https://appshunter.io/ios/app/fenify/id6792350340)

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

**In-app purchases:** none


## Frequently asked questions

### Is Blunder Zero free?

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

### Is Fenify free?

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

### Do Blunder Zero or Fenify have ads?

Neither Blunder Zero nor Fenify shows ads.

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

Blunder Zero ships an update every 6 weeks, and Fenify weekly. Most recently, Blunder Zero was updated on October 8, 2026 and Fenify on October 12, 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.*