Comparison

Audio Function Generator PRO vs Sonic | Water Eject

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

Sonic | Water Eject

This app generates precise sine wave tones to help remove water and debris from your device's speakers. Easily adjust frequencies by swiping on the screen, and enjoy features like Apple Watch control and background operation. Premium subscribers gain access to advanced waveforms, unlimited sessions, and an ad-free experience.

Highlights
  • Clears moisture from device speakers
  • Generates tones from 0 Hz to 25 kHz
  • Control via Apple Watch
  • Background operation
  • Broadcast to Bluetooth/Airplay speakers
  • Unique waveforms (Premium)
Features
Currently charting
Read full description

Sonic is the original app used to clean water from your iPhone speakers. Use the speaker cleaning session to clear out your speakers and get things sounding like new again. Sonic generates a sine wave tone with easy precise control over the frequency. Simply swipe your finger up and down anywhere on the screen to raise or lower the tone frequency. Swipe slowly for small frequency adjustments quickly for larger adjustments.  Sonic features you will love: • Clear moisture from your iPhone speakers. • Generate tones from 0 Hz to Ultrasonic 25 kHz.   • Control Sonic from your Apple Watch.   • Use other apps with Sonic in the background. • Broadcast Sonic to bluetooth and Airplay speakers. More features available to Premium Subscribers: • Limitless speaker cleaning sessions. • Unique waveforms to choose from. • Unlimited preset creation. • No Ads, ever. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Audio Function Generator PRO4 screens
Sonic | Water Eject4 screens

Verdict

The call

The clearest difference is price: Sonic | Water Eject at Free against Audio Function Generator PRO's $9.99. Sonic | Water Eject also leads on ratings volume (21K vs 269) and update cadence (every 2 weeks vs every 6 weeks). Audio Function Generator PRO's advantage is in-app purchases (none vs 9) and ads (none vs shown). On rating, review sentiment 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

Sonic | Water Eject is free to download; Audio Function Generator PRO costs $9.99 up front. Sonic | Water Eject sells 9 in-app purchases, starting at $1.99 per 7 days. Audio Function Generator PRO asks for nothing beyond the download.

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 Sonic | Water Eject. That said, the two scores are not equally well evidenced: Sonic | Water Eject has 21K 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 81% of Sonic | Water Eject's.

UpkeepUpdate frequency

Audio Function Generator PRO ships an update every 6 weeks, Sonic | Water Eject every 2 weeks. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

Scorecard8 real differences · 3 level
Audio Function Generator PRO versus Sonic | Water Eject: the parameters behind the verdict, then further details
ParameterAudio Function Generator PROSonic | Water Eject
Price$9.99Free — better
Rating4.8 (269 ratings) — better4.7 (21K ratings)
Positive reviews87.9% of reviews — better81.2% of reviews
Number of ratings26921K — better
Update frequencyEvery 6 weeksEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
Best chart rank—#183 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.5 — better17.6
Further details — not scored
Size13 MB50 MB
Age rating4+4+
DeveloperThomas GruberVonBruno LLC

Customer experience

Audio Function Generator PRO

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

Sonic | Water Eject

All ratings20,655 ratings
Positive92.4%
Neutral2.3%
Negative5.3%
Written reviews1,520 reviews
Positive81.2%
Neutral2.4%
Negative16.4%

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

Sonic | Water Eject

From 21K App Store ratings

What we love

  • 🚀 Works great for water ejection
  • 🔧 Effectively removes water from speakers
  • 👍 Saved phones from water damage
  • 💡 Useful for tuning instruments and sound healing

Room to improve

  • 🔒 Premium features now behind paywall
  • 💰 Subscription model too expensive
  • 🔇 Ads interfere with usability
  • 🐛 Frequency controls not user-friendly

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

Sonic | Water Eject

Reported bugs

2 issues
  • Frequency controls fixed at 530Hz in some versions
  • Close button not responsive in some cases

Requested features

3 requests
  • Add volume control to play in background
  • Provide manual frequency input option
  • Implement binaural beat feature

In-app purchases

None

Audio Function Generator PRO

No in-app purchases

9 purchases

Sonic | Water Eject

Subscriptions5
  • Weekly$1.997 Days
  • Monthly$2.991 Month
  • Weekly$2.997 Days
Show 2 more
  • Annual3 Days trial$9.991 Year
  • Annual3 Days trial$29.991 Year
One-time4
  • Sonic Clean$0.99
  • Sonic Presets$2.99
  • Sonic Waveforms$2.99
Show 1 more
  • Lifetime$24.99

Questions

Is Audio Function Generator PRO free?
Audio Function Generator PRO costs $9.99, with no in-app purchases.
Is Sonic | Water Eject free?
Sonic | Water Eject is free to download, with in-app purchases available.
Which has better reviews, Audio Function Generator PRO or Sonic | Water Eject?
Audio Function Generator PRO is rated higher. Audio Function Generator PRO averages 4.8 out of 5 from 269 ratings, while Sonic | Water Eject averages 4.7 from 21K ratings.
Do Audio Function Generator PRO or Sonic | Water Eject have ads?
Sonic | Water Eject shows ads; Audio Function Generator PRO does not.
Which is updated more often, Audio Function Generator PRO or Sonic | Water Eject?
Audio Function Generator PRO ships an update every 6 weeks, and Sonic | Water Eject every 2 weeks. Most recently, Audio Function Generator PRO was updated on September 21, 2026 and Sonic | Water Eject on September 24, 2026.

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