# The Start Button vs Soap Lye Calculator

The clearest difference is price: The Start Button at Free against Soap Lye Calculator's $3.99. The Start Button also leads on update cadence (weekly vs every 3 months). Soap Lye Calculator's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 26.0). On ads and in-app purchases there is nothing between them.

The Start Button is free to download; Soap Lye Calculator costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

The Start Button ships an update weekly, Soap Lye Calculator every 3 months. The most recent releases landed on October 12, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | The Start Button | Soap Lye Calculator |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 months |
| Size | 5 MB | 34 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hoi Mau Hung](https://appshunter.io/developer/1805445282) | [Jelmer van Nuss](https://appshunter.io/developer/1880809991) |

## What reviewers say

### The Start Button

[App page](https://appshunter.io/ios/app/the-start-button/id6743993949)

**In-app purchases:** none


### Soap Lye Calculator

[App page](https://appshunter.io/ios/app/soap-lye-calculator/id6762357300)

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

**In-app purchases:** none


## Frequently asked questions

### Is The Start Button free?

The Start Button is free to download, with no in-app purchases.

### Is Soap Lye Calculator free?

Soap Lye Calculator costs $3.99, with no in-app purchases.

### Do The Start Button or Soap Lye Calculator have ads?

Neither The Start Button nor Soap Lye Calculator shows ads.

### Which is updated more often, The Start Button or Soap Lye Calculator?

The Start Button ships an update weekly, and Soap Lye Calculator every 3 months. Most recently, The Start Button was updated on October 12, 2026 and Soap Lye Calculator on October 19, 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.*