# Blundr vs ChessFlow

The clearest difference is iOS requirement: Blundr at 15.1 against ChessFlow's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Blundr sells 2 in-app purchases, starting at $12.99 per month and ChessFlow sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 4 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | Blundr | ChessFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Size | 32 MB | 202 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Christopher Macier](https://appshunter.io/developer/1873602494) | [Giorgio Donnoli](https://appshunter.io/developer/6777981338) |

## What reviewers say

### Blundr

[App page](https://appshunter.io/ios/app/blundr/id6771425215)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Blundr Pro | $12.99 | per month |
| Blundr Pro | $104.99 | per year |


### ChessFlow

[App page](https://appshunter.io/ios/app/chessflow/id6777981336)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ChessFlow Virtual | $4.99 | per month |
| ChessFlow Premium | $8.99 | per month |
| ChessFlow Virtual | $29.99 | per year |
| ChessFlow Premium | $49.99 | per year |


## Frequently asked questions

### Is Blundr free?

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

### Is ChessFlow free?

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

### Do Blundr or ChessFlow have ads?

Neither Blundr nor ChessFlow shows ads.

### Which is updated more often, Blundr or ChessFlow?

Blundr ships an update every 4 days, and ChessFlow every 4 days. Most recently, Blundr was updated on November 5, 2026 and ChessFlow on November 5, 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.*