Comparison

Audio Function Generator PRO vs Nubert Control X

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Audio Function Generator PRO

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
Read full description

This is the highly recommended and praised Function Generator App - an amazingly great and powerful tone generator. Enriched with a vast amount of features yet it is extremely intuitive and designed for simplicity. Get to know this great App now! It is very well maintained and has received considerable upgrades over the past years. So, … what can you do with this App? • PLAY TEST TONES Sine, Rectangular, Triangular and Sawtooth. • PLAY FREQUENCY SWEEP TEST TONES in both directions (minimum to maximum frequency and maximum to minimum frequency). • PLAY VOLUME SWEEPS (from minimum to maximum volume). • Try the SWEEP REPEAT / WOBBLE function. • Try the MUSIC TONES PLAYBACK. • Experiment with the huge FINE TUNE SELECTON, PRESETS SELECTION! • Or create your own CUSTOM PRESETS! • And SAVE an endless amount of CONFIGURATIONS (Frequency, Sweep, Noise) for later quick access and direct playback function. • Even play back different kinds of NOISE – White, Pink, Violet, Grey, Brown, Blue is also supported. The Function Generator is AMAZINGLY INTUITIVE and SIMPLE! AND THESE ARE THE ADVANCED SETTINGS/FEATURES: => Extending The Frequency Range (1Hz - 21kHz) => Extending The Sweep Times (0.1s - 600s) => Changing Min/Max Slider Frequency Ranges => Changing Max Sweep Time Slider Range => Changing Signal Amplitude => Enabling Of The Sweep Repeat / Wobble Function => Frequency Slider Setting to Linear or Logarithmic => Left/Right Channel Individual Selection => Permanently Saving Custom Presets => Saving Of Endless Number Of Audio Configurations => Phase Out Setting (custom phase shift of the generated signal) => BPM (Beats per Minute) Feature => Dual Function Generator => MultiTone Generator (playback of up to eight individual tones) => Background Theme Selection (Light/Dark) Check out the new Tutorial page: www.ee-toolkit.com/audio-function-generator

About

Nubert Control X

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
Read full description

The application is specifically designed and best way to use nuControl X on your network. It runs as a remote control with full function to operate the device remotely. With USB flash or dlna server, you can select and play songs easily with most comfortable and enjoyable interface. By our X-Room Calibration, the app conveniently corrects the bass response from 20 to 300Hz via fully parametric IIR filtering. Supports Tidal, Qobuz, Deezer, and Airable Radio/Podcasts streaming service.

Screenshots

Audio Function Generator PRO4 screens
Nubert Control X4 screens

Verdict

The call

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). 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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Audio Function Generator PRO versus Nubert Control X: the parameters behind the verdict, then further details
ParameterAudio Function Generator PRONubert Control X
Price$14.99Free — better
Rating4.8 (270 ratings) — better—
Positive reviews87.9% of reviews — better0.0% of reviews
Number of ratings270 — better—
Update frequencyEvery 6 weeks — betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.011.0 — better
Further details — not scored
Size13 MB27 MB
Age rating4+4+
DeveloperThomas GruberNubert electronic GmbH

Customer experience

Audio Function Generator PRO

All ratings270 ratings
Positive94.8%
Neutral2.6%
Negative2.6%
Written reviews58 reviews
Positive87.9%
Neutral5.2%
Negative6.9%

Nubert Control X

Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Audio Function Generator PRO

Reported bugs

6 issues
  • 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
Show 1 more
  • App stops too much

Requested features

19 requests
  • 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
Show 14 more
  • Audio plugin (AU, AAX, VST)
  • Responsiveness for MacBook use
  • Simultaneous recording of generated signals
  • Panning function for tones and sweeps
  • Ability to save Multitone configurations
  • Phase shift functionality
  • Higher frequency range (up to 24kHz)
  • Dual mode sweep function
  • Taper function
  • Extended time for sweeps (6-8 hours)
  • Ability to stay at selected frequency for several minutes
  • Spectrum analyzer
  • Separate control for left and right channels
  • 8-hour program for sleep entrainment

Nubert Control X

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Audio Function Generator PRO

No in-app purchases

None

Nubert Control X

No in-app purchases

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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