RTA Pro vs K
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RTA Pro
Transform your iOS device into a professional audio analysis tool. Analyze ambient noise frequencies, pinpoint room resonance, and set up sound systems for events. Features include custom calibration, multiple display modes, and adjustable speed settings.
- Real-time audio spectrum analysis
- Frequency range 32Hz to 16kHz
- Linear, dB(A), and dB(C) weightings
- 1/3 Octave Bands, Octave Bands, and FFT display
- Adjustable speed settings
- Custom calibration options
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RTA Pro is a real time audio spektrum analyzer. It turns your iOS device into a powerful audio test system usually seen only in audio research laboratories and music studios. Such instruments are used to analyze the frequency spectrum of ambient noise, e.g. to be able to pinpoint frequencies which cause rumble in a room. Another use is the level setting setting of PA systems for concerts. Features: RTA Pro requires iOS11 or later and has been calibrated for the microphones of most iPhones. Custom calibration is also possible. The frequency range is 32Hz to 16kHz. Linear display, as well as weightings for measuring dB(A) and dB(C) is provided. Apart from 1/3 Octave Bands and Octave Bands, RTA Pro also features the display of a Fast Fourier Transform (FFT). The speed is adjustable to impulse, 128ms and 1 second.
K
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K-AUDIO-72是KH7002、KH7200的一款控制软件，分为iPhone版和ipad版两个版本。 KH7002： 1) 本机是一款针对家庭使用的中高端音响设备，集无线麦克风、手机音频推送、音视频解码、卡拉OK、、音频解码，支持杜比7.1功放于一体。 2) 本机体积紧凑、功能强大，基于DSP全数字音频系统。 3) 具有双路双麦，加 入卡拉OK混响效果。 4) 无线和蓝牙音频推送，支持USB音频播放 5) 无线APP功能控制。 6) 主系统控制芯片采用 M4内核STM32F407IIT6，主频高达180MHz。 7) 显示采用5寸高清IPS屏，电容触控，分辨率480*854 8) 配专业PC软件、IOS APP，支持wifi、RS232实时控制 9) 支持中控功能 (串口控制) 10) 支持standby模式。
Screenshots
Verdict
The clearest difference is price: K at Free against RTA Pro's $5.99. K also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (8.0 vs 17.6). On ads, 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
K is free to download; RTA Pro costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
RTA Pro ships an update every 3 months, K every 3 weeks. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.
| Parameter | RTA Pro | K |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 4.5 (2 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 8.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthias Schorer | HMAUDIO Technology Co.,Ltd |
In-app purchases
RTA Pro
No in-app purchases
K
No in-app purchases
