# Wattage Conversion vs Wattage Calculator

The clearest difference is price: Wattage Conversion at Free against Wattage Calculator's $0.99. Wattage Calculator's advantage is in-app purchases (none vs 1) and update cadence (weekly vs monthly). On ads, device support and iOS requirement there is nothing between them.

Wattage Conversion is free to download; Wattage Calculator costs $0.99 up front. Wattage Conversion sells 1 one-off in-app purchase. Wattage Calculator asks for nothing beyond the download.

Wattage Conversion ships an update monthly, Wattage Calculator weekly. The most recent releases landed on October 25, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Wattage Conversion | Wattage Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 37 MB | 9 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [akira ohmachi](https://appshunter.io/developer/1338624340) | [Luis Alexander Padilla Velez](https://appshunter.io/developer/1770369808) |

## What reviewers say

### Wattage Conversion

[App page](https://appshunter.io/ios/app/wattage-conversion/id6473688997)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### Wattage Calculator

[App page](https://appshunter.io/ios/app/wattage-calculator/id6717572315)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Wattage Conversion free?

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

### Is Wattage Calculator free?

Wattage Calculator costs $0.99, with no in-app purchases.

### Do Wattage Conversion or Wattage Calculator have ads?

Neither Wattage Conversion nor Wattage Calculator shows ads.

### Which is updated more often, Wattage Conversion or Wattage Calculator?

Wattage Conversion ships an update monthly, and Wattage Calculator weekly. Most recently, Wattage Conversion was updated on October 25, 2026 and Wattage Calculator 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.*