Comparison

Audio Function Generator vs Tone Generator+ Freq

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

Generate various audio test tones, including sine, square, triangle, and sawtooth waves. Explore frequency and volume sweeps, noise generation, and custom preset creation. Advanced features like extended frequency ranges and multi-tone playback are available with an upgrade.

Highlights
  • Generate sine, square, triangle, and sawtooth tones
  • Frequency and volume sweep generation
  • Noise generation (white, pink, violet, etc.)
  • Custom preset creation and saving
  • Extended frequency range (PRO feature)
  • Multi-tone playback (PRO feature)
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 to use! AND THESE ARE THE ADVANCED SETTINGS/FEATURES (upgrade to PRO required): => 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 tutorial page: www.ee-toolkit.com/audio-function-generator

About

Tone Generator+ Freq

Generate precise audio tones with various waveforms for testing, calibration, and experiments. Offers a wide frequency range and adjustable volume in a simple interface.

Highlights
  • Precise frequency generation
  • Multiple waveform types (sine, square, sawtooth, triangle)
  • Adjustable volume control
  • Full audible range support (20 Hz - 20,000 Hz)
  • Clean and stable audio output
  • Simple user interface
Features
Read full description

Tone Generator: Frequency Hz plays audio tones from 1 Hz to 22 kHz — pick a frequency or a preset, press the big Play button under the dial, and hear it. Sine, square, sawtooth and triangle waves, plus white, pink and brown noise. The tone keeps playing when you switch to another app or lock the screen, so a tone or noise can run while you read, work or rest. A sleep timer (15, 30 or 60 minutes) stops it for you. ▶ SET THE FREQUENCY • Step with the frequency arrows, jump by semitone or octave, or tap A4 • Watch the note name and cents readout as you go • Type exact Hz values for the right ear, the mixer and the sweep • The tone you hear matches the frequency shown on screen ▶ WAVEFORMS AND NOISE • Sine for a clean pure tone • Square, sawtooth and triangle for harmonics • White, pink and brown noise ▶ PRESETS — ONE TAP TO HEAR THEM • Tinnitus masking tone, sleep, A4 440 Hz, subwoofer 60 Hz, bass strings E A D G, dog whistle, cat repel • Brainwave beat pack (delta, theta, alpha, beta, gamma) and solfeggio tones • Save your own presets, including mixer setups • Tapping a preset starts the sound; if a tone is already playing, it switches to the new preset ▶ CHANNELS, BEATS AND SWEEP • Mono, stereo with a separate right-ear frequency, binaural beats and isochronic tones • Dual tone: two frequencies at once • Mixer: layer up to four tones, each with its own waveform and level • Frequency sweep between any two frequencies, once or looping, with the dial following the sweep ▶ MORE TOOLS • Instrument tuner: play a note and see its pitch and cents (uses the microphone) • Water Eject: a 165 Hz tone at full volume to help push water out of the speaker • Speaker and subwoofer checks with steady tones and sweeps ▶ WHO IT IS FOR • Musicians checking tuning against an exact Hz • People testing speakers, headphones and subwoofers • Students exploring sound, frequency and waveforms • Anyone who wants a steady tone or noise in the background ▶ SAFETY Start at a low volume. Loud tones, especially high frequencies, can harm hearing and speakers. Brainwave and solfeggio presets are traditionally used in relaxation and focus routines; they are not a medical or therapeutic treatment. The tinnitus preset is a masking tone, not a treatment. Available in 30 languages.

Screenshots

Audio Function Generator4 screens
Tone Generator+ Freq3 screens

Verdict

The call

The clearest difference is in-app purchases: Tone Generator+ Freq at none against Audio Function Generator's 1. Tone Generator+ Freq also leads on update cadence (every 5 days vs every 6 weeks) and rating (5.0 vs 4.7). Audio Function Generator's advantage is ads (none vs shown) and ratings volume (2.2K vs 2). On price, 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

Both are free to download. Audio Function Generator sells 1 one-off in-app purchase. Tone Generator+ Freq asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Tone Generator+ Freq holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Audio Function Generator ships an update every 6 weeks, Tone Generator+ Freq every 5 days. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

Scorecard6 real differences · 4 level
Audio Function Generator versus Tone Generator+ Freq: the parameters behind the verdict, then further details
ParameterAudio Function GeneratorTone Generator+ Freq
PriceFreeFree
Rating4.7 (2.2K ratings)5.0 (2 ratings) — better
Positive reviews77.1% of reviews—
Number of ratings2.2K — better2
Update frequencyEvery 6 weeksEvery 5 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size13 MB68 MB
Age rating4+17+
DeveloperThomas GruberKyu-Hee Jang

Customer experience

Audio Function Generator

All ratings2,211 ratings
Positive91.9%
Neutral3.1%
Negative5.0%
Written reviews271 reviews
Positive77.1%
Neutral6.3%
Negative16.6%

Tone Generator+ Freq

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Audio Function Generator

Reported bugs

4 issues
  • Crashes on launch
  • Volume slider issues
  • Airplay not working
  • Sound distortion when display is active

Requested features

6 requests
  • Add download/save feature for custom sounds
  • Improve sweep function (continuous mode, better frequency control)
  • Add more multi-frequency rows
  • Implement 432Hz base frequency option
  • Add phase control for noise generators
Show 1 more
  • Improve accessibility (VoiceOver support)

Tone Generator+ Freq

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Audio Function Generator

One-time1
  • Upgrade to PRO$9.99
None

Tone Generator+ Freq

No in-app purchases

Questions

Is Audio Function Generator free?
Audio Function Generator is free to download, with in-app purchases available.
Is Tone Generator+ Freq free?
Tone Generator+ Freq is free to download, with no in-app purchases.
Which has better reviews, Audio Function Generator or Tone Generator+ Freq?
Tone Generator+ Freq is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Tone Generator+ Freq averages 5.0 from 2 ratings.
Do Audio Function Generator or Tone Generator+ Freq have ads?
Tone Generator+ Freq shows ads; Audio Function Generator does not.
Which is updated more often, Audio Function Generator or Tone Generator+ Freq?
Audio Function Generator ships an update every 6 weeks, and Tone Generator+ Freq every 5 days. Most recently, Audio Function Generator was updated on October 17, 2026 and Tone Generator+ Freq on October 12, 2026.

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