# Watt vs DitDah Decoder

The clearest difference is price: Watt at $1.99 against DitDah Decoder's $19.99. DitDah Decoder's advantage is update cadence (monthly vs every 18 months) and iOS requirement (18.4 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Watt costs $1.99 and DitDah Decoder $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Watt ships an update every 18 months, DitDah Decoder monthly. The most recent releases landed on October 8, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Watt | DitDah Decoder |
| --- | --- | --- |
| Price | **$1.99** | $19.99 |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/watt-power-calculator/id459111718/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Monthly** |
| Monetization | Paid | — |
| Size | 3 MB | 29 MB |
| Requires iOS | 26.0 | **18.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LionsApp di Nallbati Elton](https://appshunter.io/developer/432915499) | [Timothy Diehl](https://appshunter.io/developer/1859707586) |

## What reviewers say

### Watt

[App page](https://appshunter.io/ios/app/watt-power-calculator/id459111718)

Easily calculate wattage using three different formulas. Input values and get instant results, with options to copy or email your calculations. Features an intuitive design for a smooth and reliable user experience.

**Highlights:** Calculate watt from 3 formulas, Copy and paste results, Send results via email, Formulas always visible, Intuitive graphics, Ease of use

**Features:** macOS Compatibility, 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 Watt free?

Watt costs $1.99, with no in-app purchases.

### Is DitDah Decoder free?

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

### Do Watt or DitDah Decoder have ads?

Neither Watt nor DitDah Decoder shows ads.

### Which is updated more often, Watt or DitDah Decoder?

Watt ships an update every 18 months, and DitDah Decoder monthly. Most recently, Watt was updated on October 8, 2026 and DitDah Decoder on October 2, 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.*