# 421Grid vs maxChord

The clearest difference is price: maxChord at Free against 421Grid's $1.99. maxChord also leads on update cadence (every 10 days vs every 3 months). 421Grid's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

maxChord is free to download; 421Grid costs $1.99 up front. maxChord sells 3 in-app purchases, starting at $1.99 per month. 421Grid asks for nothing beyond the download.

421Grid ships an update every 3 months, maxChord every 10 days. The most recent releases landed on October 15, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | 421Grid | maxChord |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Size | 4 MB | 317 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [N. Wheeler](https://appshunter.io/developer/312350021) | [Maximilian Schmidt](https://appshunter.io/developer/6792498118) |

## What reviewers say

### 421Grid

[App page](https://appshunter.io/ios/app/421grid/id1598461370)

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

**In-app purchases:** none


### maxChord

[App page](https://appshunter.io/ios/app/maxchord/id6792498116)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $8.99 | per year |
| Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is 421Grid free?

421Grid costs $1.99, with no in-app purchases.

### Is maxChord free?

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

### Do 421Grid or maxChord have ads?

Neither 421Grid nor maxChord shows ads.

### Which is updated more often, 421Grid or maxChord?

421Grid ships an update every 3 months, and maxChord every 10 days. Most recently, 421Grid was updated on October 15, 2026 and maxChord 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.*