Comparison

AudioTools, dB, Sound & Audio vs Audio Function Generator PRO

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AudioTools, dB, Sound & Audio

This professional audio analysis app offers a comprehensive suite of tools for acoustic measurements, including SPL, RTA, and FFT. It calibrates device microphones for accurate results and allows for the addition of powerful optional modules for advanced analysis.

Highlights
  • SPL Meter with A/C weighting
  • Real Time Analyzer (RTA)
  • Fast Fourier Transform (FFT) analysis
  • Speaker Polarity Test
  • Audio Oscilloscope
  • Signal Generator
  • Audio Recorder
Features
Currently charting
Read full description

AudioTools from Studio Six Digital is a suite of professional-grade audio and acoustic analysis apps. Included in the price of this app is a great collection of professional tools -- SPL, RTA, FFT, Speaker Polarity Test, Generator, Audio Scope, CLF Viewer, and Recorder, and the framework to add more powerful modules as you need them. Customize AudioTools for your needs by buying any of the additional optional modules, like Smaart Tools I, SPL Graph, or Impulse Response, at any time right from your iOS device. We test every iOS device and calibrate the microphone level and frequency response for the best results. We have the ability to turn off the Apple low frequency filters, and on many devices we can measure up to 120 dB SPL. Add iTestMic, iPrecisionMic, or iAudioInterface2 for a complete professional audio and acoustic test and measurement platform. Actual reviews: “...AudioTools is a “how did I ever live without it” app”. “I think this application is the best I EVER purchased.” “I have used many thousands of dollars of complicated test equipment that doesn’t measure up to this app suite.” ***** Included in the app price ***** * SPL Meter A faithful reproduction of a classic analog SPL meter. Includes A and C weighting, and Fast and Slow ANSI decay modes. All filters meet or exceed ANSI type 1. * RTA A 1/3 and octave band Real Time Analyzer. Includes touch-GUI range control, a cursor, max/min bars, and noise curve overlays. * FFT Detailed acoustic analysis, up to 32876 points. View full detail or smooth to 1/24, 1/6, 1/3 or octave. Includes cursor, scalable graphics, and peak tracking. * Polarity Speaker polarity checker. Route the test signal to a speaker, and read the polarity of the speaker on the screen. * CLF Viewer Show loudspeaker data, including plots for impedance, axial response, sensitivity, polar response, and 6dB coverage, and a 3D color balloon plot. * Delay Finder Measures the time it takes for a pulse to return from a speaker. * Generator Generates sine waves, square waves, white and pink noise. * Line Level Tests A line level measurement function and frequency counter. * Audio Scope A dual-channel audio oscilloscope that includes auto-triggering, variable gain and sweep rate, and storage of scope images. * Recorder A mono/stereo audio recorder with WAV and compressed formats and 8k-48k sample rate. Transfer files via WIFI. * File transfer of results via wifi to PC / Mac. * Audio Calculators ***** Optional modules available for purchase from within AudioTools ***** * SoundScope VR - FFT-based audio analyzer with VR. The powerful acoustical analysis module. Includes RTA graphs to 1/48th octave and Spectrograph, and can display VR. * Transfer Function -- Requires 2-channel interface. Two-channel FFT-based measurement. Allows you to analyze sound system performance with music or pink noise as the signal source. * ETC Energy Time Curve. Plot decay of an impulse over time, and compute RT60 time. Internal or External trigger. * Impulse Response Record and analyze an impulse or sine sweep, compute octave and 1/3 octave ETC, T30, C50, C80, CT, Definition. * LARSA Fast and accurate sine-sweep measurement of loudspeakers and rooms. * SPL Pro Digital SPL meter with ANSI Slow, Fast, Peak, and Impulse mode, along with LEQ. Includes A and C weighting, and all 10 octave band filters. * SPL Graph Plot second-by-second SPL level for up to 24 hours, and optionally record the audio. Also, add the optional Octave Band Logging upgrade to elevate this tool to rival any professional logging SPL Meter. * SPL Traffic Light Monitor live sound levels SPL and Leq and see status in a simple green-yellow-red display. * STIPA Speech Intelligibility Meets the current NFPA code standards for testing evac systems and schools. * Speaker Distortion Measure THD+n of any driver. * THD+n (requires iAudioInterface) * Impedance Meter and Plot (requires iAudioInterface) * Phase Meter * Amplitude Sweep

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

Screenshots

AudioTools, dB, Sound & Audio4 screens
Audio Function Generator PRO4 screens

Verdict

The call

The clearest difference is price: Audio Function Generator PRO at $9.99 against AudioTools, dB, Sound & Audio's $19.99. Audio Function Generator PRO also leads on in-app purchases (none vs 11) and review sentiment (88% vs 75%). AudioTools, dB, Sound & Audio's advantage is ratings volume (5.1K vs 269) and update cadence (fortnightly vs every 6 weeks). On rating, ads, device support 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

AudioTools, dB, Sound & Audio costs $19.99 and Audio Function Generator PRO $9.99 up front. AudioTools, dB, Sound & Audio sells 11 in-app purchases, starting at $9.99 per month. 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 AudioTools, dB, Sound & Audio against 4.8 for Audio Function Generator PRO. That said, the two scores are not equally well evidenced: AudioTools, dB, Sound & Audio has 5.1K ratings behind it against 269, so its average is the more settled of the two. Written reviews are what separate them: 75% of AudioTools, dB, Sound & Audio's written reviews are positive against 88% of Audio Function Generator PRO's.

UpkeepUpdate frequency

AudioTools, dB, Sound & Audio ships an update fortnightly, Audio Function Generator PRO every 6 weeks. The most recent releases landed on October 2, 2026 and September 30, 2026 respectively.

Scorecard7 real differences · 4 level
AudioTools, dB, Sound & Audio versus Audio Function Generator PRO: the parameters behind the verdict, then further details
ParameterAudioTools, dB, Sound & AudioAudio Function Generator PRO
Price$19.99$9.99 — better
Rating4.8 (5.1K ratings)4.8 (269 ratings)
Positive reviews74.9% of reviews87.9% of reviews — better
Number of ratings5.1K — better269
Update frequencyFortnightly — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#25 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.5
Further details — not scored
Size95 MB13 MB
Age rating4+4+
DeveloperAndrew SmithThomas Gruber

Customer experience

AudioTools, dB, Sound & Audio

All ratings5,078 ratings
Positive95.7%
Neutral1.7%
Negative2.6%
Written reviews358 reviews
Positive74.9%
Neutral4.5%
Negative20.7%

Audio Function Generator PRO

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

User reviews

AudioTools, dB, Sound & Audio

From 5.1K App Store ratings

What we love

  • 👍 Useful audio tools
  • 🚀 Regularly updated
  • 💡 Industry-standard features
  • 👍 Accurate measurements
  • 👍 Great support

Room to improve

  • 🔒 Many features locked behind paywall
  • 🐛 Buggy iOS port
  • 🔒 Expensive in-app purchases
  • 🐛 Inconsistent functionality
  • 🐛 Microphone issues

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

Bugs and requests

AudioTools, dB, Sound & Audio

Reported bugs

3 issues
  • Crashes on launch
  • Inaccurate SPL and frequency measurements
  • Compatibility issues with iOS updates

Requested features

4 requests
  • Add manual
  • Improve file export and sharing
  • Improve user interface
  • Add support for external microphones

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

In-app purchases

11 purchases

AudioTools, dB, Sound & Audio

Subscriptions1
  • All-In Module Access7 Days trial$9.991 Month
One-time10
  • VU Meter$2.99
  • Polarity Test Module$3.99
  • ETC Module$5.99
Show 7 more
  • Speaker Distortion$5.99
  • SPL Pro Module$7.99
  • SPL Graph Module$9.99
  • SPL Traffic Light$9.99
  • SoundScope VR$24.99
  • LARSA$29.99
  • IR Module$49.99
None

Audio Function Generator PRO

No in-app purchases

Questions

Is AudioTools, dB, Sound & Audio free?
AudioTools, dB, Sound & Audio costs $19.99, and also offers in-app purchases.
Is Audio Function Generator PRO free?
Audio Function Generator PRO costs $9.99, with no in-app purchases.
Which has better reviews, AudioTools, dB, Sound & Audio or Audio Function Generator PRO?
AudioTools, dB, Sound & Audio and Audio Function Generator PRO are both rated 4.8 out of 5 on the App Store, from 5.1K and 269 ratings respectively.
Do AudioTools, dB, Sound & Audio or Audio Function Generator PRO have ads?
Neither AudioTools, dB, Sound & Audio nor Audio Function Generator PRO shows ads.
Which is updated more often, AudioTools, dB, Sound & Audio or Audio Function Generator PRO?
AudioTools, dB, Sound & Audio ships an update fortnightly, and Audio Function Generator PRO every 6 weeks. Most recently, AudioTools, dB, Sound & Audio was updated on October 2, 2026 and Audio Function Generator PRO on September 30, 2026.

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