# 421Grid vs KEYCANVAS

The clearest difference is price: KEYCANVAS at Free against 421Grid's $1.99. KEYCANVAS also leads on iOS requirement (13.4 vs 18.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

KEYCANVAS is free to download; 421Grid costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

421Grid ships an update every 3 months, KEYCANVAS every 4 months. The most recent releases landed on October 15, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 421Grid | KEYCANVAS |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Size | 4 MB | 514 MB |
| Requires iOS | 18.0 | **13.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [N. Wheeler](https://appshunter.io/developer/312350021) | [iDance](https://appshunter.io/developer/1680177485) |

## What reviewers say

### 421Grid

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

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

**In-app purchases:** none


### KEYCANVAS

[App page](https://appshunter.io/ios/app/keycanvas/id6447109406)

**In-app purchases:** none


## Frequently asked questions

### Is 421Grid free?

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

### Is KEYCANVAS free?

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

### Do 421Grid or KEYCANVAS have ads?

Neither 421Grid nor KEYCANVAS shows ads.

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

421Grid ships an update every 3 months, and KEYCANVAS every 4 months. Most recently, 421Grid was updated on October 15, 2026 and KEYCANVAS on October 4, 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.*