马克一下 vs Spectrum Analyzer+ FFT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
马克一下
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你不是不想整理，只是不想现在整理。 把截图、票据、行程、资料页和生活照片导入 MarkOnce，剩下的交给它：识别内容，生成标题、摘要和关键词，再按主题归类。 需要记住时间，就加个提醒；不想打字，就留段语音备注。图片和视频都能保存，整理时也不用一直盯着等。 你只管随手存。等真正需要时，再轻松找回来。
Spectrum Analyzer+ FFT
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.
- 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
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Spectrum Analyzer+ FFT transforms your iPhone into a professional audio frequency analyzer. Using the built-in microphone, it visualizes sound frequencies in real time with a detailed FFT spectrum display. The analyzer captures live audio through the microphone and breaks it down into individual frequency bands, showing the amplitude of each frequency from 20 Hz to 20 kHz. Note: This app analyzes audio in real time for visualization purposes only — it does not record or store any audio. Key Features: - Real-time FFT audio spectrum visualization via microphone - Frequency range from 20 Hz to 20 kHz - Peak frequency detection with Hz display - Average dB level per frequency band - Adjustable dB range for detail viewing - Smooth animated bar display - Dark theme optimized for readability Whether you're a musician tuning instruments, an audio engineer checking room acoustics, or a sound enthusiast exploring frequencies, Spectrum Analyzer+ gives you a powerful visualization tool in your pocket.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | 马克一下 | Spectrum Analyzer+ FFT |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | — | 2.3 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, Mac — better | iPhone |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 55 MB | 69 MB |
| Age rating | 4+ | 17+ |
| Developer | Beijing Memory Vision Technology Co., Ltd. | Kyu-Hee Jang |
In-app purchases
马克一下
No in-app purchases
Spectrum Analyzer+ FFT
No in-app purchases
