Comparison

Audio Function Generator PRO vs Sound Decibel Meter

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

Sound Decibel Meter

Measure ambient noise levels with this clear, simple, and accurate app. It helps you monitor hearing health by detecting noise types, analyzing sound pressure, and syncing data with your Health app. Features include recording, sharing, and adherence to OSHA/NIOSH standards.

Highlights
  • Smart AI noise meter
  • Accurate sound pressure measurements
  • Sync with Health app
  • Sound recording and data saving
  • OSHA and NIOSH standards
  • Measurement range 20db to 160db
  • Microphone calibration
Features
Read full description

Our app is developed to measure the level of ambient noises. We have tried to make it as clear, simple and accurate as possible so that each person has the opportunity to quickly measure and monitor hearing health. To ensure precision, we calibrated our app using a real professional-grade sound meter. Key Features: - Smart AI noise meter to detect noise type - Accurate sound pressure measurements - Various types of audio waves - Sync with the Health app - track noise levels and monitor your hearing health - Reference table to compare noise levels - Various types of measurements: dBa, dBc, dBz - Sound recording and noise data saving - Possibility to share records - Convenient dosimeter - Selection of standards for allowable hearing loads: OSHA and NIOSH - Measurement range from 20db to 160db - Microphone calibration for more accurate measurements - Response speed settings - User-friendly and intuitive interface - Display of current, average and maximum values Our app has the possibility to synchronize with the Health app. To do this, you need to go to the app settings and turn on the health tab there. After that, information about the volume of the ambient noise will be transmitted to the Health app, so you can track the amount of consumed noise. You can also set the interval of data on the incoming noise. The app uses a microphone to track the sound pressure level. You can record information about the ambient noise in real time, as well as save all data in a playlist so that you can return to this data at any time. Do you work in high noise environments? Do you want to find out if the neighbors are not exceeding the permissible volume values? Or maybe you want to monitor the health of your ears? If yes, our app can serve you as a faithful assistant. Important! The application does not guarantee a 100% result, since the measurements you obtain depend on your device and may contain inaccuracies. For a more accurate result, it is better to calibrate the app or compare the obtained data with a professional sound level meter. ------------------------------- * Subscription: Get access to all premium functions of the app. * You can turn off the auto-renewal at any time: you'll find the option to do this change to a different payment plan in the settings of your iTunes and App Store account. * The first time you can try the free trial for 3 days. After that, your account will be automatically charged for the subscription if you will not stop it before the end of the free trial. * The length of the subscription is 1 month, this subscription is auto-renewing. You can stop the subscription at any moment; * Account will be charged for renewal within 24-hours prior to the and of the current period, and identity the cost of the renewal. ATTENTION: before you subscribe please read: Terms Of Use (https://shorturl.at/VFeKX) Privacy Policy (https://shorturl.at/FsZOG)

Screenshots

Audio Function Generator PRO4 screens
Sound Decibel Meter4 screens

Verdict

The call

The clearest difference is review sentiment: Audio Function Generator PRO at 88% against Sound Decibel Meter's 40%. Audio Function Generator PRO also leads on in-app purchases (none vs 2) and rating (4.8 vs 4.5). Sound Decibel Meter's advantage is price (Free vs $14.99) and device support (4 vs 2). On ratings volume, update cadence, 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

Sound Decibel Meter is free to download; Audio Function Generator PRO costs $14.99 up front. Sound Decibel Meter sells 2 in-app purchases, starting at $4.99 per month. 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 4.5. Both are backed by a comparable volume of ratings — 270 and 336 respectively. Written reviews point the same way: 88% of Audio Function Generator PRO's written reviews are positive against 40% of Sound Decibel Meter's.

UpkeepUpdate frequency

Audio Function Generator PRO ships an update every 6 weeks, Sound Decibel Meter every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
Audio Function Generator PRO versus Sound Decibel Meter: the parameters behind the verdict, then further details
ParameterAudio Function Generator PROSound Decibel Meter
Price$14.99Free — better
Rating4.8 (270 ratings) — better4.5 (336 ratings)
Positive reviews87.9% of reviews — better40.0% of reviews
Number of ratings270336 — better
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS16.015.6 — better
Further details — not scored
Size13 MB18 MB
Age rating4+4+
DeveloperThomas GruberArpenik Katikyan

Customer experience

Audio Function Generator PRO

All ratings270 ratings
Positive94.8%
Neutral2.6%
Negative2.6%
Written reviews58 reviews
Positive87.9%
Neutral5.2%
Negative6.9%

Sound Decibel Meter

All ratings336 ratings
Positive87.2%
Neutral3.6%
Negative9.2%
Written reviews35 reviews
Positive40.0%
Neutral8.6%
Negative51.4%

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

Sound Decibel Meter

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Audio Function Generator PRO

No in-app purchases

2 purchases

Sound Decibel Meter

Subscriptions2
  • Spectrogram-noise level tools3 Days trial$4.991 Month
  • Spectrogram-noise level tools3 Days trial$5.991 Month

Questions

Is Audio Function Generator PRO free?
Audio Function Generator PRO costs $14.99, with no in-app purchases.
Is Sound Decibel Meter free?
Sound Decibel Meter is free to download, with in-app purchases available.
Which has better reviews, Audio Function Generator PRO or Sound Decibel Meter?
Audio Function Generator PRO is rated higher. Audio Function Generator PRO averages 4.8 out of 5 from 270 ratings, while Sound Decibel Meter averages 4.5 from 336 ratings.
Do Audio Function Generator PRO or Sound Decibel Meter have ads?
Neither Audio Function Generator PRO nor Sound Decibel Meter shows ads.
Which is updated more often, Audio Function Generator PRO or Sound Decibel Meter?
Audio Function Generator PRO ships an update every 6 weeks, and Sound Decibel Meter every 2 months. Most recently, Audio Function Generator PRO was updated on November 1, 2026 and Sound Decibel Meter on November 3, 2026.

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