# Spectrum Analyzer+ FFT vs RTA01

The clearest difference is in-app purchases: Spectrum Analyzer+ FFT at none against RTA01's 3. RTA01's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. RTA01 sells 3 one-off in-app purchases. Spectrum Analyzer+ FFT asks for nothing beyond the download.

## The numbers

| Metric | Spectrum Analyzer+ FFT | RTA01 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-plus-fft/id6760830858/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Weekly | — |
| Monetization | Ad-supported | — |
| Size | 69 MB | 3 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) | [Shunsuke Takasu](https://appshunter.io/developer/6788974380) |

## What reviewers say

### Spectrum Analyzer+ FFT

[App page](https://appshunter.io/ios/app/spectrum-analyzer-plus-fft/id6760830858)

This utility transforms your device into a real-time audio frequency analyzer. It visualizes sound frequencies from 20 Hz to 20 kHz using the microphone, displaying amplitude and peak frequencies. It's designed for musicians, audio engineers, and sound enthusiasts.

**Highlights:** Real-time FFT audio spectrum visualization, Frequency range 20 Hz to 20 kHz, Peak frequency detection, Average dB level per band, Adjustable dB range, Dark theme

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

**In-app purchases:** none


### RTA01

[App page](https://appshunter.io/ios/app/rta01/id6793456897)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A roll of vinyl tape | $0.99 | one-time |
| A roll of gaffer tape | $1.99 | one-time |
| Tip - XLR Connector | $6.99 | one-time |


## Frequently asked questions

### Is Spectrum Analyzer+ FFT free?

Spectrum Analyzer+ FFT is free to download, with no in-app purchases.

### Is RTA01 free?

RTA01 is free to download, with in-app purchases available.

### Do Spectrum Analyzer+ FFT or RTA01 have ads?

Spectrum Analyzer+ FFT shows ads; RTA01 does not.

---

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