# chmod util vs DitDah Decoder

The clearest difference is price: chmod util at Free against DitDah Decoder's $19.99. DitDah Decoder's advantage is update cadence (monthly vs every 63 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

chmod util is free to download; DitDah Decoder costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

chmod util ships an update every 63 months, DitDah Decoder monthly. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | chmod util | DitDah Decoder |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 63 months | **Monthly** |
| Size | 2 MB | 29 MB |
| Requires iOS | **17.6** | 18.4 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mattia Righetti](https://appshunter.io/developer/1513841416) | [Made by Tim LLC](https://appshunter.io/developer/1859707586) |

## What reviewers say

### chmod util

[App page](https://appshunter.io/ios/app/chmod-util/id1581290826)

**Features:** Vision Pro support

**In-app purchases:** none


### DitDah Decoder

[App page](https://appshunter.io/ios/app/ditdah-decoder-morse-code-cw/id6756274811)

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

**In-app purchases:** none


## Frequently asked questions

### Is chmod util free?

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

### Is DitDah Decoder free?

DitDah Decoder costs $19.99, with no in-app purchases.

### Do chmod util or DitDah Decoder have ads?

Neither chmod util nor DitDah Decoder shows ads.

### Which is updated more often, chmod util or DitDah Decoder?

chmod util ships an update every 63 months, and DitDah Decoder monthly. Most recently, chmod util was updated on November 7, 2026 and DitDah Decoder on October 30, 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.*