Comparison

Audio Function Generator vs Noise Guru

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

Generate various audio test tones, including sine, square, triangle, and sawtooth waves. Explore frequency and volume sweeps, noise generation, and custom preset creation. Advanced features like extended frequency ranges and multi-tone playback are available with an upgrade.

Highlights
  • Generate sine, square, triangle, and sawtooth tones
  • Frequency and volume sweep generation
  • Noise generation (white, pink, violet, etc.)
  • Custom preset creation and saving
  • Extended frequency range (PRO feature)
  • Multi-tone playback (PRO feature)
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 to use! AND THESE ARE THE ADVANCED SETTINGS/FEATURES (upgrade to PRO required): => 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 tutorial page: www.ee-toolkit.com/audio-function-generator

About

Noise Guru

Measure sound levels with precision to understand your environment and protect your hearing. Identify loud noises, monitor noise pollution, and find quiet spaces for recording. Features include a decibel dosimeter, background noise measurement, and geo-tagged recordings.

Highlights
  • Precise sound level metering (SPL)
  • DB Dosimeter for noise exposure tracking
  • Background noise measurement
  • Noise pollution monitoring
  • Geo-tagged noise recordings
  • Unlimited recording duration
Read full description

Want to expose the absurd loudness of your pet's snoring? Need to find a quiet place to record, so your social media video doesn’t turn out to be muffled? Take control of your sound environment with ease with the ultimate tool for measuring decibels and taking control of your hearing health. With precise sound level metering, you can measure the sound pressure level (SPL) and choose your preferred display format. The app also allows you to measure pet snoring loudness and find a quiet recording spot for social media users and streams. Features: - Keep track of the noise you're exposed to with the DB Dosimeter, set acceptable noise standards and be informed if the noise level exceeds the typical threshold. - Measure noise in the background. - Monitor noise pollution with DB Dosimeter. - Overlay video with noise recordings and geo-tagged location. - Set your customized display options with video effects - Record without limits on duration. Don't risk damaging your hearing with prolonged exposure to constant daily noise. Take control of your hearing health with this app and protect your hearing for the long term. “[..] perhaps as many as 40 million adults (24 percent)—have features of their hearing test that suggest hearing loss in one or both ears from exposure to loud noise. Researchers have also estimated that as many as 17 percent of teens (ages 12 to 19) have features of their hearing test suggestive of NIHL in one or both ears” NIH report on noise-induced hearing loss, NIH Publication No. 14-4233, March 2014 Terms of Use: http://aserykh.com/decibel/terms-of-use Privacy Policy: http://aserykh.com/decibel/privacy-policy

Screenshots

Audio Function Generator4 screens
Noise Guru4 screens

Verdict

The call

The clearest difference is in-app purchases: Noise Guru at none against Audio Function Generator's 1. Noise Guru also leads on review sentiment (88% vs 77%). Audio Function Generator's advantage is ratings volume (2.2K vs 299). On price, rating, update cadence and ads 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

Both are free to download. Audio Function Generator sells 1 one-off in-app purchase. Noise Guru asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Audio Function Generator against 4.6 for Noise Guru. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 299, so its average is the more settled of the two. Written reviews are what separate them: 77% of Audio Function Generator's written reviews are positive against 88% of Noise Guru's.

UpkeepUpdate frequency

Audio Function Generator ships an update every 6 weeks, Noise Guru monthly. The most recent releases landed on September 24, 2026 and September 10, 2026 respectively.

Scorecard4 real differences · 6 level
Audio Function Generator versus Noise Guru: the parameters behind the verdict, then further details
ParameterAudio Function GeneratorNoise Guru
PriceFreeFree
Rating4.7 (2.2K ratings) — better4.6 (299 ratings)
Positive reviews77.1% of reviews88.3% of reviews — better
Number of ratings2.2K — better299
Update frequencyEvery 6 weeksMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.514.0 — better
Further details — not scored
Size14 MB15 MB
Age rating4+4+
DeveloperThomas GruberAndrei Serykh

Customer experience

Audio Function Generator

All ratings2,191 ratings
Positive91.8%
Neutral3.1%
Negative5.1%
Written reviews271 reviews
Positive77.1%
Neutral6.3%
Negative16.6%

Noise Guru

All ratings299 ratings
Positive91.0%
Neutral6.4%
Negative2.7%
Written reviews120 reviews
Positive88.3%
Neutral7.5%
Negative4.2%

User reviews

Audio Function Generator

From 2.2K App Store ratings

What we love

  • 👍 Great app
  • 🎶 Helps with Tinnitus
  • 💯 Best app I've paid for
  • 🔍 Highly recommended
  • 🎨 Attention to detail

Room to improve

  • 🐛 Crashes
  • 💰 Deceptive/Money hungry
  • 🔒 Basic features paywalled
  • 🔒 Limited without paying
  • 🔒 Removed functionality to push paid version

Noise Guru

From 299 App Store ratings

What we love

  • 👍 Effective tool
  • 👍 Clean interface
  • 👍 Allows measuring loudness
  • 👍 Visually appealing and easy to use
  • 👍 Efficient and effective

Room to improve

  • 🐛 Accuracy issues compared to other apps
  • 🔋 Can't play audio while using the app

Bugs and requests

Audio Function Generator

Reported bugs

4 issues
  • Crashes on launch
  • Volume slider issues
  • Airplay not working
  • Sound distortion when display is active

Requested features

6 requests
  • Add download/save feature for custom sounds
  • Improve sweep function (continuous mode, better frequency control)
  • Add more multi-frequency rows
  • Implement 432Hz base frequency option
  • Add phase control for noise generators
Show 1 more
  • Improve accessibility (VoiceOver support)

Noise Guru

Reported bugs

2 issues
  • Forced to leave a review to use the app
  • Can't delete max values

Requested features

2 requests
  • Add frequency meter
  • Add option to reset max/min values

In-app purchases

1 purchases

Audio Function Generator

One-time1
  • Upgrade to PRO$9.99
None

Noise Guru

No in-app purchases

Questions

Is Audio Function Generator free?
Audio Function Generator is free to download, with in-app purchases available.
Is Noise Guru free?
Noise Guru is free to download, with no in-app purchases.
Which has better reviews, Audio Function Generator or Noise Guru?
Audio Function Generator is rated higher. Audio Function Generator averages 4.7 out of 5 from 2.2K ratings, while Noise Guru averages 4.6 from 299 ratings.
Do Audio Function Generator or Noise Guru have ads?
Neither Audio Function Generator nor Noise Guru shows ads.
Which is updated more often, Audio Function Generator or Noise Guru?
Audio Function Generator ships an update every 6 weeks, and Noise Guru monthly. Most recently, Audio Function Generator was updated on September 24, 2026 and Noise Guru on September 10, 2026.

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