# Ratios vs Wattage Conversion

The clearest difference is in-app purchases: Ratios at none against Wattage Conversion's 1. Ratios also leads on iOS requirement (10.3 vs 15.6). Wattage Conversion's advantage is update cadence (monthly vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. Wattage Conversion sells 1 one-off in-app purchase. Ratios asks for nothing beyond the download.

Ratios ships an update every 5 months, Wattage Conversion monthly. The most recent releases landed on August 15, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Ratios | Wattage Conversion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (79 ratings)](https://appshunter.io/ios/app/ratios/id1286379929/reviews)** | — |
| Number of ratings | **79** | — |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free | — |
| Size | 17 MB | 37 MB |
| Requires iOS | **10.3** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Brushed Type Ltd](https://appshunter.io/developer/1460743402) | [akira ohmachi](https://appshunter.io/developer/1338624340) |

## What reviewers say

### Ratios

[App page](https://appshunter.io/ios/app/ratios/id1286379929)

This application helps home baristas calculate precise coffee brewing ratios. Easily determine the exact weight of coffee beans and water needed for your desired brew strength. All values are instantly editable to see how adjustments impact your final cup.

**Highlights:** Calculate coffee bean and water weights, Adjustable brew strength, Instant value updates, Free and open source, Supports various brew amounts

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Ratios free?

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

### Is Wattage Conversion free?

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

### Do Ratios or Wattage Conversion have ads?

Neither Ratios nor Wattage Conversion shows ads.

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

Ratios ships an update every 5 months, and Wattage Conversion monthly. Most recently, Ratios was updated on August 15, 2026 and Wattage Conversion on September 21, 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.*