# SimpleFFT vs WindPower Business

The clearest difference is in-app purchases: WindPower Business at none against SimpleFFT's 1. WindPower Business also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 18 months). SimpleFFT's advantage is iOS requirement (15.0 vs 18.6). On price and device support there is nothing between them.

Both are free to download. SimpleFFT sells 1 one-off in-app purchase. WindPower Business asks for nothing beyond the download.

SimpleFFT ships an update every 18 months, WindPower Business every 3 weeks. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SimpleFFT | WindPower Business |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Every 3 weeks** |
| Size | 5 MB | 9 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [HIROFUMI MARUO](https://appshunter.io/developer/667820705) | [rainbow-learning-software](https://appshunter.io/developer/1784094642) |

## What reviewers say

### SimpleFFT

[App page](https://appshunter.io/ios/app/simplefft/id1239257017)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Functions | $0.49 | one-time |


### WindPower Business

[App page](https://appshunter.io/ios/app/windpower-business/id6759105195)

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

**In-app purchases:** none


## Frequently asked questions

### Is SimpleFFT free?

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

### Is WindPower Business free?

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

### Do SimpleFFT or WindPower Business have ads?

SimpleFFT shows ads; WindPower Business does not.

### Which is updated more often, SimpleFFT or WindPower Business?

SimpleFFT ships an update every 18 months, and WindPower Business every 3 weeks. Most recently, SimpleFFT was updated on November 2, 2026 and WindPower Business on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*