Audio Function Generator PRO vs Tone Generator EM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
Tone Generator EM
Generate sounds across a wide frequency range to test hearing, tune instruments, or experiment with audio. Easily select frequencies with a slider, adjust volume, and play tones.
- Generate sounds from 1Hz to 22kHz
- Test hearing and audio equipment
- Tune musical instruments
- Intuitive frequency slider
- Adjust volume
- Note list with corresponding frequencies
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Tone Generator is a free frequency sound generator app that allows you to generate sounds in different frequencies from the lowest to the highest ranges, from 1Hz to 22kHz. Using this free frequency generator app, you can test your hearing, test audio equipment, tune different instruments, perform audio experiments, and much more. Download Tone Generator for free on your device, utilize the slider to choose the specific frequency, adjust the volume, and hit the Play button. Tone Generator main features: • Clean and neat design with a fresh and intuitive interface • Advanced yet easy-to-use frequency generator app • Change frequency slider range from the lowest to the highest • Pick up a note from the note list with corresponding frequency • Adjust audio frequency and device’s volume So, if you are a musician and are looking for a free frequency sound generator to tune musical instruments and test audio equipment, you’ve come to the right place. This free tone generator app has got you covered when it comes to testing your hearing. Stay tuned and let us know about any bugs, questions, feature requests, or any other suggestions.
Screenshots
Verdict
The clearest difference is review sentiment: Audio Function Generator PRO at 88% against Tone Generator EM's 0%. Audio Function Generator PRO also leads on in-app purchases (none vs 1) and ads (none vs shown). Tone Generator EM's advantage is price (Free vs $9.99) and iOS requirement (13.0 vs 15.5). On update cadence 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
Tone Generator EM is free to download; Audio Function Generator PRO costs $9.99 up front. Tone Generator EM sells 1 one-off in-app purchase. Audio Function Generator PRO asks for nothing beyond the download.
Audio Function Generator PRO holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Audio Function Generator PRO has 269 ratings behind it against 36, so its average is the more settled of the two. Written reviews point the same way: 88% of Audio Function Generator PRO's written reviews are positive against 0% of Tone Generator EM's.
Audio Function Generator PRO ships an update every 6 weeks, Tone Generator EM every 2 months. The most recent releases landed on September 25, 2026 and August 25, 2026 respectively.
| Parameter | Audio Function Generator PRO | Tone Generator EM |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.8 (269 ratings) — better | 4.4 (36 ratings) |
| Positive reviews | 87.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 269 — better | 36 |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Best chart rank | #196 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.5 | 13.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Gruber | myrApps |
Customer experience
Audio Function Generator PRO
Tone Generator EM
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 moreShow fewer
- 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
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- 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 EM
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Audio Function Generator PRO
No in-app purchases
Tone Generator EM
- Premium Lifetime Upgrade$3.99
Questions
Is Audio Function Generator PRO free?
Is Tone Generator EM free?
Which has better reviews, Audio Function Generator PRO or Tone Generator EM?
Do Audio Function Generator PRO or Tone Generator EM have ads?
Which is updated more often, Audio Function Generator PRO or Tone Generator EM?
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