Comparison

Audio Function Generator vs Tone Generator EX

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

Head to head

Audio Function Generator

Frequency and Signal Generator

Free

🔧 Utilities

★ 4.72.2K ratingsView app →

Tone Generator EX

Free

🔧 Utilities

★ 4.8439 ratingsView app →

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 EX

Generate a wide range of audio tones with adjustable frequencies and waveforms. Control playback in the background, from your notification drawer, or lock screen. The app automatically pauses for calls and alarms, and allows you to save custom presets.

Highlights

Frequency range 15Hz to 22KHz
Sine, Square, Sawtooth, Triangle waveforms
Auto-off timer
Background playback
Notification drawer control
Create custom presets
Set frequency by music note

Features

Read full description

Tone Generator EX is an audio tone generator. It provides following features: ● Frequency range from 15Hz to 22KHz. ● Can play 4 different waveforms: Sine/Square/Sawtooth/Triangle ● Auto-off timer. ● Playback running in background. ● Playback can be controlled from the notification drawer, lock screen or headset button without having to reopen the APP. ● Auto-pause on incoming call, alarm, etc. ● You can create your own presets. ● Set frequency by selecting a music note.

Screenshots

Audio Function Generator4 screens

Tone Generator EX3 screens

Verdict

The call

The clearest difference is in-app purchases: Tone Generator EX at none against Audio Function Generator's 1. Tone Generator EX also leads on update cadence (every 9 days vs every 6 weeks) and review sentiment (91% vs 77%). Audio Function Generator's advantage is ads (none vs shown) and ratings volume (2.2K vs 439). On price, rating 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

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

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Audio Function Generator against 4.8 for Tone Generator EX. Both are backed by a comparable volume of ratings — 2.2K and 439 respectively. Written reviews are what separate them: 77% of Audio Function Generator's written reviews are positive against 91% of Tone Generator EX's.

UpkeepUpdate frequency

Audio Function Generator ships an update every 6 weeks, Tone Generator EX every 9 days. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

Scorecard7 real differences · 3 level

Audio Function Generator versus Tone Generator EX: the parameters behind the verdict, then further details
Parameter	Audio Function Generator	Tone Generator EX
Price	Free	Free
Rating	4.7 (2.2K ratings)	4.8 (439 ratings) — better
Positive reviews	77.1% of reviews	90.7% of reviews — better
Number of ratings	2.2K — better	439
Update frequency	Every 6 weeks	Every 9 days — better
Ads	No — better	Yes
In-app purchases	Yes	No — better
Monetization	Free with in-app purchases	Ad-supported — better
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.5	10.0 — better
Further details — not scored
Size	14 MB	29 MB
Age rating	4+	4+
Developer	Thomas Gruber	An-Che Lee

Customer experience

Audio Function Generator

All ratings2,191 ratings

Positive91.8%

Neutral3.1%

Negative5.1%

Written reviews271 reviews

Positive77.1%

Neutral6.3%

Negative16.6%

Tone Generator EX

All ratings439 ratings

Positive95.7%

Neutral1.6%

Negative2.7%

Written reviews54 reviews

Positive90.7%

Neutral1.9%

Negative7.4%

User reviews

Audio Function Generator

From 2.2K App Store ratings

What we love

👍 Great app
🎶 Helps with Tinnitus
💯 Best app I've paid for
🔍 Highly recommended
🎨 Attention to detail

Room to improve

🐛 Crashes
💰 Deceptive/Money hungry
🔒 Basic features paywalled
🔒 Limited without paying
🔒 Removed functionality to push paid version

Tone Generator EX

From 439 App Store ratings

What we love

👍 Clean, intuitive, and elegant interface design
🎵 Precise frequency control with decimal accuracy
💰 Completely free with no ads or subscriptions
⚙️ Customizable A440 tuning standard adjustment
💾 Preset saving and loading functionality

Room to improve

📉 Limited frequency range (minimum 15Hz, maximum needs extension)
🚫 No direct frequency input via typing
⏸️ No export functionality for generated tones
🔇 Clicking sounds during frequency adjustments
📱 No stereo output capability

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 EX

Reported bugs

3 issues

App crashes and won't play after initial use
Requires unnecessary credit card information
Potential compatibility issues with newer iOS versions

Requested features

15 requests

Extend frequency range to 10Hz or lower (0-12Hz requested)
Extend upper frequency range to support .4-12Hz adjustments
Direct frequency input by typing instead of dial adjustment
VST3/AUv3/desktop plugin version for DAW integration
Frequency sweep functionality with adjustable speed

Show 10 more

Automated frequency sweep with smooth ascending/descending
Export generated tones to audio files
Stereo output capability
Automatic numerical sorting of presets
Play presets directly from list with individual play buttons
Output level attenuator in dB
Option to disable clicking sounds during frequency changes
Dual tone generation (play two frequencies simultaneously)
Paid ad-free version option
Duty cycle control for square waves

In-app purchases

1 purchases

Audio Function Generator

One-time1

Upgrade to PRO$9.99

None

Tone Generator EX

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 EX free?

Tone Generator EX is free to download, with no in-app purchases.

Which has better reviews, Audio Function Generator or Tone Generator EX?

Tone Generator EX is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Tone Generator EX averages 4.8 from 439 ratings.

Do Audio Function Generator or Tone Generator EX have ads?

Tone Generator EX shows ads; Audio Function Generator does not.

Which is updated more often, Audio Function Generator or Tone Generator EX?

Audio Function Generator ships an update every 6 weeks, and Tone Generator EX every 9 days. Most recently, Audio Function Generator was updated on October 10, 2026 and Tone Generator EX on October 6, 2026.