# Audio Function Generator PRO — user reviews > 58 indexed App Store user reviews of Audio Function Generator PRO by Thomas Gruber, rated 4.80/5 from 269 ratings. - Source: https://appshunter.io/ios/app/audio-function-generator-pro/id895074703/reviews - App overview in markdown: https://appshunter.io/ios/app/audio-function-generator-pro/id895074703.md - Rating breakdown: 5★ 237 · 4★ 18 · 3★ 7 · 2★ 3 · 1★ 4 ## What do users think of Audio Function Generator PRO? Overall sentiment: positive **Pros** - ✨ 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 - 🔧 Customizable presets and modulation - 🎧 Useful for tinnitus relief - 🔊 Great for audio testing and tuning - 💡 Elegant and sophisticated interface - 💰 Best value for money - 🛠️ Excellent support - 🎛️ Detailed sound wave control - 🎯 Accurate and easy to use - 🔊 Good for speaker testing - 🎶 Useful for sleep entrainment - 🎹 Perfect for speaker building - 💡 Well-thought-out and implemented - 💯 Top frequency generator - ✅ All functions present - 🎚️ Bargain price, highly recommended - 🎶 Excellent for piano tuning - 👂 Useful for hearing checks - 🔬 Great for electronics lab - 💾 Parameter saving is great - 🚀 Sweep function is great - ⚙️ Practical tool, not overwhelmed with graphics - 🔊 Accurate and functional - 🎵 Easy to use, perfect for speakers - 🌟 Best in class - 🚀 Excellent application - 💡 Electronic tuning fork - ✅ Good multiple use app - 👍 Great as a function generator in the electronics lab - 💯 Excellent tone generator - ✨ Super top - 👍 Great app - 🚀 Great app - 🎶 Great app - 👍 Great app **Cons** - 📉 Linear sweep is useless - ❓ Missing PWM functionality - ❓ Missing Terzrauschen (third-octave noise) - 🐛 Volume button issues - 🐛 GUI is bad - 🐛 Buttons don't respond - 🐛 Settings don't keep - 🐛 Frequencies stick - 🐛 App stops too much - 📉 Frequency range not enough - 🐛 Update crashes on iPad Air2 - 🐛 App opens AppStore repeatedly after purchase **Commonly reported bugs** - 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 - App stops too much **Most requested features** - 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 - 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 ## Newest reviews (14 of 58) ### 5/5 — 528hz, 432hz healing audio & binaural beats *2021-11-25* This app makes it easy to play 528hz, 432hz, Solfeggio tones, white noise and other custom audio frequencies for healing and any other audio production, meditation or enjoyment purpose. Any creative audio professional should get ahold of this app, especially if you want to use non-standard tunings. I use it to match tones, tune songs, audio files and instruments by ear, play true binaural beats, match frequencies on my modular Synthesizer and more. It’s my go-to reference for 432hz, 528hz and Solfeggio tones for my music. Thanks for making this app! - DJ Soulfeggio ### 5/5 — Does everything I wanted *2021-08-31* Awesome app to test and tune your set up or just to test the capabilities of your speakers. I like to use my finger to slide through the frequencies. ### 5/5 — Screwy Volume *2021-06-06* Screwy volume when using the iPhone side buttons. Jumps up and down by 6 or more, also displays wrong volume level (sometimes even shows “muted” when not). NEEDS to be increased and decreased by 1. Slider works fine but I very much dislike sliders especially when they’re that small. Other than that nice app with lots of features. Using on iPhone 12 Pro and iPad Pro 9.7, same issue on both. Please fix! Will change to 5⭐️ when this issue is fixed. Update: I wasn’t aware the volume button issue was an Apple limitation. Hats off to the developers for being so attentive to the end users. Outstanding app! Money well spent. **Developer response:** The increment/decrement of 6 via the volume buttons is implemented that way by Apple. I can’t change this. Since the volume range is 0-100, this is intentional I guess because it would require too many button presses for volume changes. Best, -tom ### 5/5 — Outstanding App! *2021-02-03* The details and options of controlling sound waves is more than you could ask for in a iOS app! It’s pure mathematics in your hand... and ears! Although I have many technical/scientific uses for it, I like to set up a deep-bass, oscillation, multiphase-waveform as I lay on a couch with a subwoofer underneath - a fully customizable back massage... the ultimate no-contact TENS device! Thank you to the developer for keeping it up all these years! ### 5/5 — Best bang for the buck, 2nd only to... *2020-12-19* Tom Gruber’s other application Multitone Pro. All his applications are phenomenal though; especially the EE Toolkit! The only suggestions I have are to enable ping-pong sweeps in the Multitone windows and to allow sweeping of the noise/adding noise in the Multitone sweep (with a sweeping bandpass filter). ### 5/5 — Awesome 👏🏻 Audio Function Generator!!! *2020-10-23, version 5.4.1* Awesome 👏🏻 Audio Function Generator!!! ### 5/5 — Finally temporary relief from Tinnitus *2020-10-17* I suffer T 24/7. High pitched screech all day and night. Hubby did some research and found this app. Bought it straight away and by God it helps so much. ### 5/5 — Muito bom *2020-04-17* Gostaria de parabenizá-los pelo belo trabalho. Tenho dois pontos a depor: 1 ) Vocês podem transformar este aplicativo em um plugin de áudio? AU, AAX,VST. Este aplicativo é superior a qualquer plugin Signal Generator comparado aos que vêm nas DAW’S. Bem mais completo que os geradores de sinal do Pro Tools e Cubase. Fica registrado o pedido. 2) Poderiam por gentileza tornar este aplicativo responsivo, afim de que possa ser utilizado no MacBook e não apenas no iPhone. Creio que os usuários irão tirar muito mais proveito do Ótimo Aplicativo de vocês. Obrigado. Saudações do Brasil. ### 5/5 — Super convenient tone generator with sweep *2020-01-07* An excellently engineered audio generator at a most reasonable price ### 5/5 — Suggestion *2019-12-10* Could we simultaneously record the signals we generate Bille Wilson ### 5/5 — Panning function? *2019-09-12* Great app, good quality sound and array of functions and uses. I have a request: can you add a panning function? That is, make it possible to pan between left and right on tones and during sweeps? ### 5/5 — Love this *2019-01-29* Clear and Easy to use. Works perfectly with full range of frequencies! ### 5/5 — Used on YouTube by KissAnalog *2019-01-16, version 3.4.0* This is an amazing-impressive app!! I can’t believe how many tools it provides and so straight forward to use! I use it on my YouTube channel and it has made my testing so much easier and quicker!!! Thank you Tom! ### 5/5 — Question *2018-12-17* I bought the app how do i phase shift or “phase out” **Developer response:** Hello! Just tap on the phase button (Φ). This will open the phase menu where you can set your custom phase per channel (-180° to 180°). If you have further questions please just send me an Email to tom@ee-toolkit.com. cheers ## Most critical reviews (10 lowest-rated) ### 1/5 — Too many issues *2018-09-09, version 3.2.1* Stops too much ### 1/5 — Does not work *2016-11-04, version 2.3.3* This app. Appears to work but the frequencies stick and the program is useless. The creator is not helpful he tells you the app is fine and then you have to delete and download again only to find app still does not work on a new iPad ### 2/5 — Too linear. *2023-03-20* If you want more stars please explain how to get logarithmic sweeps and logarithmic scale for the frequency slider. A linear sweep is pretty useless in the audio world. **Developer response:** Hello Ro_bert! Please go to the Settings page and change both, the frequency slider and the frequency sweep setting to logarithmic. Best, -tom ### 2/5 — Loads of functions, no functionality *2016-12-11, version 2.3.3* Would be good if the dumb thing worked right. Buttons don't respond, settings don't keep. And the GUI, man, it's bad. Wanted this app to be great... ### 3/5 — Terzrauschen? *2021-05-07* Schade: Bei der pro-Version habe ich ein Tool, unabdingbar zum Einmessen von Lautsprechersystemen, das Terzrauschen, schmerzlich vermisst. Ist ja alles schick und intuitiv zu bedienen, aber so ist die App für mich nutzlos. Haben Sie eine Empfehlung? ### 3/5 — Pro *2019-11-10* Comprei a versão pro. Mas toda vez que abro fala que tem versão nova e abre a AppStore. Isso tá chato demais. Eu já paguei pq isso agora!?!? **Developer response:** sorry about that. But you have the latest version. A fix is now available. ### 3/5 — Frequency range is not enough *2018-02-14* iOS can support 48kHz sampling rate. Should support Up to 24kHz. ### 4/5 — Good app!! *2024-08-14* Good app ### 4/5 — I need PWM !!! *2022-09-19* Why is PWM not built in ??? ### 4/5 — Kernfunktionalität astrein, *2019-02-12* … aber leider funktioniert der Generator nicht via Audiobus, obwohl er dort auswählbar ist, schaaade. Und die Möglichkeit, auch Multitone-Konfigurationen abzuspeichern, wäre natürlich der Hit – in denen steckt zumindest bei meinen Anwendungen letztlich die meiste Arbeit. **Developer response:** Hallo nikohfb, ja, stimmt. Der Funktionsgenerator ist leider nicht kompatibel mit Audiobus. Dafür habe ich die standalone MultiTone App im Programm. Die könntest du gratis downloaden zum Testen. Funktioniert auch mit AB Remote. Das Speichern von MultiTone Konfigurationen werde ich mir (für beide Apps) gerne anschauen. Viele Grüße, -tom ## Most praised reviews (10 highest-rated) ### 5/5 — a true masterpiece *2025-02-03* [Update] __ A great App just got a little better ! The History feature is icing on the cake. . . I tried the free version, and within minutes purchased PRO … This App is a superb piece of work and works beautifully on my ageing 9.7” iPad Pro. Many thanks to the developer for his craftsmanship! ### 5/5 — Engineer *2025-02-02* Continues to become greater ### 5/5 — Pro *2025-01-07* 5/5 ### 5/5 — a true masterpiece *2024-10-23* I tried the free version, and within minutes purchased PRO … This App is a superb piece of work and works beautifully on my ageing 9.7” iPad Pro. Many thanks to the developer for his craftsmanship! ### 5/5 — amazing app *2024-07-10* elegant and sophisticated 😎 ### 5/5 — FOR THE GODS *2024-05-29* We can use Function Generator Pro with Function Generator Free to play 2 frequencies at the same time with BPM. Best for Binaural Beats. We can Create the Sound we Want. MOST VALUABLE APP OF THE APPLE STORE PLUS CHEAP COST ! A MUST GET !! ### 5/5 — Versatile *2023-12-06* I’d been using the basics but recently needed something pretty weird. The 48 customizable presets and the BPM modulation feature allowed me to achieve what I needed. A GREAT app. Thank you! ### 5/5 — So good! *2023-03-10* This app is a fantastic helper! Great interface and fast responses with technical questions. ### 5/5 — Excellent *2022-09-15* For an audio geek, synth-nerd, and mostly a tinnitus sufferer, this is awesome. It's continued to evolve over the years and gets better with every update. Thanks. ### 5/5 — Einfach Spitze *2022-01-26* Eine wunderbare ständig weiter entwickelte und ausgereifte app mit einem sensationellen support --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-10.*