Comparison

Audio Function Generator PRO vs Frequency Generator

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

Frequency Generator

Generate sound waves from 1Hz to 40000Hz with various waveforms. Analyze audio frequencies, test hearing, and use for relaxation or speaker cleaning. Offers a sleep timer for peaceful rest.

Highlights
  • Multiple waveform generation (Sine, Triangle, Sawtooth, Square)
  • Real-time frequency and sound level analysis
  • Hearing test and monitoring
  • Sleep timer for relaxation
  • Speaker cleaning function
  • Educational sound wave exploration
Features
Read full description

Sound Frequency Generator is an advanced, easy-to-use sound wave generator and frequency oscillator designed for various audio testing and relaxation purposes. With its intuitive interface, it allows you to generate sound waves with frequencies ranging from 1Hz to 40000Hz (hertz), covering both the audible range for humans and near-ultrasound frequencies. Key Features: -Waveform Support: Generate high-quality sound waves in multiple forms, including Sine, Triangle, Sawtooth, and Square waves. -Frequency Analyzer: Analyze sound levels and audio frequencies in real-time to better understand sound behavior and acoustics. -Sleep Timer: Set a timer for sound playback to help you relax, meditate, or fall asleep peacefully. -Frequency Testing: Regularly test your hearing ability, which typically ranges between 20Hz and 20000Hz. Monitor any changes over time using the app's precise frequency generator. Common Features: -Hearing Test: As hearing fades with age, use this tool to evaluate your hearing range and maintain awareness of changes. -Relaxation and Focus: Generate binaural beats, white noise, or other frequencies to help with relaxation, meditation, focus, or sleep. -Speaker Cleaning: Remove water or dust from your phone’s speakers by emitting sound waves at specific frequencies. -Acoustic Testing: Evaluate how your acoustic equipment handles a wide range of frequencies, from low bass tones to high-pitched sounds near the ultrasonic range. -Science and Education: Explore the science of sound waves, frequencies, and resonance for educational purposes or experiments. Auto-Renewable Subscription Terms: - The payment will be charged to your Apple ID Account at confirmation of purchase. - The subscription renews automatically unless the auto-renew is turned off at least 24 hours before the end of the current billing period. - Your account will be charged for renewal within 24 hours before the end of your selected subscription. - Your subscriptions can be managed, and auto-renewal can be turned off by going to your App Store Account Settings. Terms of Use: https://sunshinesoftwarelabs.com/terms/

Screenshots

Audio Function Generator PRO4 screens
Frequency Generator3 screens

Verdict

The call

The clearest difference is review sentiment: Audio Function Generator PRO at 88% against Frequency Generator's 24%. Audio Function Generator PRO also leads on in-app purchases (none vs 7) and rating (4.8 vs 4.4). Frequency Generator's advantage is price (Free vs $9.99) and update cadence (every 3 weeks vs every 6 weeks). On ads 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

Frequency Generator is free to download; Audio Function Generator PRO costs $9.99 up front. Frequency Generator sells 7 in-app purchases, starting at $9.99 per year. Audio Function Generator PRO asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Audio Function Generator PRO holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 269 and 82 respectively. Written reviews point the same way: 88% of Audio Function Generator PRO's written reviews are positive against 24% of Frequency Generator's.

UpkeepUpdate frequency

Audio Function Generator PRO ships an update every 6 weeks, Frequency Generator every 3 weeks. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

Scorecard8 real differences · 2 level
Audio Function Generator PRO versus Frequency Generator: the parameters behind the verdict, then further details
ParameterAudio Function Generator PROFrequency Generator
Price$9.99Free — better
Rating4.8 (269 ratings) — better4.4 (82 ratings)
Positive reviews87.9% of reviews — better23.8% of reviews
Number of ratings269 — better82
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.5 — better16.0
Further details — not scored
Size13 MB24 MB
Age rating4+4+
DeveloperThomas GruberSunshine Software Labs

Customer experience

Audio Function Generator PRO

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

Frequency Generator

All ratings82 ratings
Positive84.1%
Neutral4.9%
Negative11.0%
Written reviews21 reviews
Positive23.8%
Neutral0.0%
Negative76.2%

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

Frequency Generator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Audio Function Generator PRO

No in-app purchases

7 purchases

Frequency Generator

Subscriptions6
  • 7 Day Free Then Get Premium$9.991 Year
  • 3 Days Free Trial Weekly VIP3 Days trial$9.997 Days
  • Get Premium Monthly$9.991 Month
Show 3 more
  • 3 Days Free Trial then Get Premium3 Days trial$19.991 Month
  • Get Premium Annual1 Month trial$49.991 Year
  • 7 Day Free Yearly VIP3 Days trial$49.991 Year
One-time1
  • Get Premium One Time Purchase$19.99

Questions

Is Audio Function Generator PRO free?
Audio Function Generator PRO costs $9.99, with no in-app purchases.
Is Frequency Generator free?
Frequency Generator is free to download, with in-app purchases available.
Which has better reviews, Audio Function Generator PRO or Frequency Generator?
Audio Function Generator PRO is rated higher. Audio Function Generator PRO averages 4.8 out of 5 from 269 ratings, while Frequency Generator averages 4.4 from 82 ratings.
Do Audio Function Generator PRO or Frequency Generator have ads?
Neither Audio Function Generator PRO nor Frequency Generator shows ads.
Which is updated more often, Audio Function Generator PRO or Frequency Generator?
Audio Function Generator PRO ships an update every 6 weeks, and Frequency Generator every 3 weeks. Most recently, Audio Function Generator PRO was updated on September 21, 2026 and Frequency Generator on September 23, 2026.

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