# 马克一下 vs Spectrum Analyzer+ FFT

The clearest difference is price: Spectrum Analyzer+ FFT at Free against 马克一下's $9.99. Spectrum Analyzer+ FFT also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (17.0 vs 26.0). 马克一下's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Spectrum Analyzer+ FFT is free to download; 马克一下 costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

马克一下 ships an update every 3 weeks, Spectrum Analyzer+ FFT weekly. The most recent releases landed on September 23, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | 马克一下 | Spectrum Analyzer+ FFT |
| --- | --- | --- |
| Price | $9.99 | **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 | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Ad-supported |
| Size | 55 MB | 69 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, Mac** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Beijing Memory Vision Technology Co., Ltd.](https://appshunter.io/developer/1475464439) | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) |

## What reviewers say

### 马克一下

[App page](https://appshunter.io/ios/app/id1506732977)

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 马克一下 free?

马克一下 costs $9.99, with no in-app purchases.

### Is Spectrum Analyzer+ FFT free?

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

### Do 马克一下 or Spectrum Analyzer+ FFT have ads?

Spectrum Analyzer+ FFT shows ads; 马克一下 does not.

### Which is updated more often, 马克一下 or Spectrum Analyzer+ FFT?

马克一下 ships an update every 3 weeks, and Spectrum Analyzer+ FFT weekly. Most recently, 马克一下 was updated on September 23, 2026 and Spectrum Analyzer+ FFT on September 3, 2026.

---

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