Comparison

Audio Function Generator PRO vs Tone Generator

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

Tone Generator

Create pure sine wave audio tones across a wide frequency range. This tool is ideal for tuning instruments, conducting hearing tests, performing science experiments, and testing audio equipment. Easily adjust frequencies and volume, with support for AirPlay devices.

Highlights
  • Generate sine wave tones
  • Frequency range 20Hz - 22,000Hz
  • Instrument tuning
  • Hearing tests
  • Science experiments
  • Audio equipment testing
  • AirPlay support
Features
Read full description

Generate pure sine wave tones at frequencies from 20hz to 22,000hz. Tone generation is useful in tuning instruments, hearing tests, science experiments, and testing audio equipment. Tone Generator has many uses: - Hearing Test: What is the lowest/highest frequency you can hear in each ear? - Tuning Instruments: Does your top guitar string match Low E at 440 Hz? - Science Experiments: What is the resonant frequency of your wine glass? - Audio System Test: What frequencies does your subwoofer support? Directions: Adjust audio frequency by dragging the slider or tapping the plus/minus buttons. Adjust device volume using the on-screen volume slider. You can also specify to play audio to any AirPlay supported device. Toggle audio playback using the Play/Pause button. Created by the audio experts at TMSOFT that brought you the famous White Noise app. Check out all our apps and sounds at http://www.tmsoft.com/

Screenshots

Audio Function Generator PRO4 screens
Tone Generator4 screens

Verdict

The call

The clearest difference is price: Tone Generator at Free against Audio Function Generator PRO's $9.99. Tone Generator also leads on ratings volume (2.6K vs 269) and update cadence (every 3 weeks vs every 6 weeks). Audio Function Generator PRO's advantage is ads (none vs shown) and review sentiment (88% vs 71%). On rating, in-app purchases, device support and iOS requirement 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

Tone Generator is free to download; Audio Function Generator PRO costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Audio Function Generator PRO against 4.7 for Tone Generator. That said, the two scores are not equally well evidenced: Tone Generator has 2.6K ratings behind it against 269, so its average is the more settled of the two. Written reviews are what separate them: 88% of Audio Function Generator PRO's written reviews are positive against 71% of Tone Generator's.

UpkeepUpdate frequency

Audio Function Generator PRO ships an update every 6 weeks, Tone Generator every 3 weeks. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

Scorecard6 real differences · 4 level
Audio Function Generator PRO versus Tone Generator: the parameters behind the verdict, then further details
ParameterAudio Function Generator PROTone Generator
Price$9.99Free — better
Rating4.8 (269 ratings) — better4.7 (2.6K ratings)
Positive reviews87.9% of reviews — better70.5% of reviews
Number of ratings2692.6K — better
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.514.0 — better
Further details — not scored
Size13 MB25 MB
Age rating4+4+
DeveloperThomas GruberTMSOFT

Customer experience

Audio Function Generator PRO

All ratings269 ratings
Positive94.8%
Neutral2.6%
Negative2.6%
Written reviews58 reviews
Positive87.9%
Neutral5.2%
Negative6.9%

Tone Generator

All ratings2,585 ratings
Positive93.3%
Neutral3.1%
Negative3.7%
Written reviews234 reviews
Positive70.5%
Neutral8.5%
Negative20.9%

User reviews

Audio Function Generator PRO

From 269 App Store ratings

What we love

  • ✨ 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

Room to improve

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

Tone Generator

From 2.6K App Store ratings

What we love

  • 👍 Simple and straightforward
  • 🚀 Works as expected
  • 💡 Useful for testing and tuning
  • 💡 Helps identify hearing range

Room to improve

  • 🐛 Ads can interfere with usage
  • 🔧 Difficulty fine-tuning frequency
  • 🔧 No amplitude/volume display
  • 🔧 Limited functionality

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

Tone Generator

Reported bugs

3 issues
  • Sound cuts out when changing frequency
  • No sound output on some devices
  • Ads block access to controls

Requested features

5 requests
  • Add frequency sweep/sweep function
  • Allow manual frequency input
  • Provide volume/amplitude display
  • Implement more precise frequency control
  • Add timer/sleep function

In-app purchases

None

Audio Function Generator PRO

No in-app purchases

None

Tone Generator

No in-app purchases

Questions

Is Audio Function Generator PRO free?
Audio Function Generator PRO costs $9.99, with no in-app purchases.
Is Tone Generator free?
Tone Generator is free to download, with no in-app purchases.
Which has better reviews, Audio Function Generator PRO or Tone Generator?
Audio Function Generator PRO is rated higher. Audio Function Generator PRO averages 4.8 out of 5 from 269 ratings, while Tone Generator averages 4.7 from 2.6K ratings.
Do Audio Function Generator PRO or Tone Generator have ads?
Tone Generator shows ads; Audio Function Generator PRO does not.
Which is updated more often, Audio Function Generator PRO or Tone Generator?
Audio Function Generator PRO ships an update every 6 weeks, and Tone Generator every 3 weeks. Most recently, Audio Function Generator PRO was updated on September 21, 2026 and Tone Generator on September 24, 2026.

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