# Audio Function Generator PRO vs Nubert Control X

The clearest difference is review sentiment: Audio Function Generator PRO at 88% against Nubert Control X's 0%. Audio Function Generator PRO also leads on update cadence (every 6 weeks vs every 6 months) and chart position (#131 vs unranked). Nubert Control X's advantage is price (Free vs $14.99) and iOS requirement (11.0 vs 16.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

Nubert Control X is free to download; Audio Function Generator PRO costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Audio Function Generator PRO ships an update every 6 weeks, Nubert Control X every 6 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Audio Function Generator PRO | Nubert Control X |
| --- | --- | --- |
| Price | $14.99 | **Free** |
| Rating | **[4.8 (270 ratings)](https://appshunter.io/ios/app/audio-function-generator-pro/id895074703/reviews)** | — |
| Number of ratings | **270** | — |
| Positive reviews | **87.9% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 6 months |
| Monetization | Free | Free |
| Best chart rank | **#131** | — |
| Size | 13 MB | 27 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Gruber](https://appshunter.io/developer/342699861) | [Nubert electronic GmbH](https://appshunter.io/developer/1387364949) |

## What reviewers say

### Audio Function Generator PRO

[App page](https://appshunter.io/ios/app/audio-function-generator-pro/id895074703)

**Currently charting:** #131 Top Paid · Music (US App Store)

Generate various audio test tones, including sine, square, and sawtooth waves. Explore frequency and volume sweeps, custom presets, and different types of noise. Advanced settings allow for fine-tuning signal parameters and creating complex multi-tone sequences.

**Highlights:** Generate sine, square, triangular, and sawtooth tones, Frequency and volume sweep generation, Customizable presets and configurations, Multiple noise types (White, Pink, Violet, etc.), Advanced signal parameter control, Multi-tone and dual function generation

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

**In-app purchases:** none

**What reviewers like**

- ✨ Superb craftsmanship and work
- 🚀 Excellent performance on older devices
- 💡 History feature is a great addition
- 👍 Versatile and powerful app
- 🎶 Great for binaural beats and sound creation

**What reviewers complain about**

- 📉 Linear sweep is useless
- ❓ Missing PWM functionality
- ❓ Missing Terzrauschen (third-octave noise)
- 🐛 Volume button issues
- 🐛 GUI is bad

**Reported bugs**

- Volume button issues (jumps up and down, displays wrong level)
- Update crashes on iPad Air2 when changing screens
- App opens AppStore repeatedly after purchase
- Buttons don't respond, settings don't keep
- Frequencies stick, program is useless

**Requested features**

- Logarithmic sweeps and frequency slider scale
- PWM functionality
- Terzrauschen (third-octave noise)
- Ping-pong sweeps in Multitone windows
- Sweeping of noise/adding noise in Multitone sweep with sweeping bandpass filter


### Nubert Control X

[App page](https://appshunter.io/ios/app/nubert-control-x/id6473332644)

Control your nuControl X device remotely with full functionality. Stream music from various services, manage playback with a comfortable interface, and optimize bass response with advanced calibration.

**Highlights:** Remote control for nuControl X, Music playback management, USB flash and DLNA server support, X-Room Calibration for bass response, Tidal, Qobuz, Deezer streaming support, Airable Radio/Podcasts integration

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

**In-app purchases:** none


## Frequently asked questions

### Is Audio Function Generator PRO free?

Audio Function Generator PRO costs $14.99, with no in-app purchases.

### Is Nubert Control X free?

Nubert Control X is free to download, with no in-app purchases.

### Do Audio Function Generator PRO or Nubert Control X have ads?

Neither Audio Function Generator PRO nor Nubert Control X shows ads.

### Which is updated more often, Audio Function Generator PRO or Nubert Control X?

Audio Function Generator PRO ships an update every 6 weeks, and Nubert Control X every 6 months. Most recently, Audio Function Generator PRO was updated on November 1, 2026 and Nubert Control X on November 4, 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.*