# SimpleFFT vs REF TEK Recorder Setup

The clearest difference is in-app purchases: REF TEK Recorder Setup at none against SimpleFFT's 1. REF TEK Recorder Setup also leads on ads (none vs shown) and iOS requirement (8.2 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. SimpleFFT sells 1 one-off in-app purchase. REF TEK Recorder Setup asks for nothing beyond the download.

SimpleFFT ships an update every 18 months, REF TEK Recorder Setup every 12 months. The most recent releases landed on August 28, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | SimpleFFT | REF TEK Recorder Setup |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Every 12 months** |
| Size | 5 MB | 96 MB |
| Requires iOS | 15.0 | **8.2** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HIROFUMI MARUO](https://appshunter.io/developer/667820705) | [Xeos Technologies Inc.](https://appshunter.io/developer/1521847029) |

## 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 |


### REF TEK Recorder Setup

[App page](https://appshunter.io/ios/app/ref-tek-recorder-setup/id1445043985)

**In-app purchases:** none


## Frequently asked questions

### Is SimpleFFT free?

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

### Is REF TEK Recorder Setup free?

REF TEK Recorder Setup is free to download, with no in-app purchases.

### Do SimpleFFT or REF TEK Recorder Setup have ads?

SimpleFFT shows ads; REF TEK Recorder Setup does not.

### Which is updated more often, SimpleFFT or REF TEK Recorder Setup?

SimpleFFT ships an update every 18 months, and REF TEK Recorder Setup every 12 months. Most recently, SimpleFFT was updated on August 28, 2026 and REF TEK Recorder Setup 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.*