# Ratio Calculation vs RetroNoise

The clearest difference is in-app purchases: Ratio Calculation at none against RetroNoise's 2. Ratio Calculation also leads on device support (3 vs 1). RetroNoise's advantage is ads (none vs shown) and update cadence (every 3 days vs every 5 months). On price and iOS requirement there is nothing between them.

Both are free to download. RetroNoise sells 2 in-app purchases, starting at $0.99 per month. Ratio Calculation asks for nothing beyond the download.

Ratio Calculation ships an update every 5 months, RetroNoise every 3 days. The most recent releases landed on September 26, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Ratio Calculation | RetroNoise |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 3 days** |
| Size | 4 MB | 20 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tomohiko Akamine](https://appshunter.io/developer/1538895235) | [非凡 常](https://appshunter.io/developer/1495411611) |

## What reviewers say

### Ratio Calculation

[App page](https://appshunter.io/ios/app/ratio-calculation/id1538895233)

**Features:** macOS Compatibility

**In-app purchases:** none


### RetroNoise

[App page](https://appshunter.io/ios/app/retronoise/id6746529238)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription Monthly | $0.99 | per month |
| Premium Subscription Yearly | $7.99 | per year |


## Frequently asked questions

### Is Ratio Calculation free?

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

### Is RetroNoise free?

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

### Do Ratio Calculation or RetroNoise have ads?

Ratio Calculation shows ads; RetroNoise does not.

### Which is updated more often, Ratio Calculation or RetroNoise?

Ratio Calculation ships an update every 5 months, and RetroNoise every 3 days. Most recently, Ratio Calculation was updated on September 26, 2026 and RetroNoise 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.*