Comparison

Audio Function Generator vs Voltcraft WIFI Scope

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

Voltcraft WIFI Scope

Features
Read full description

WIFI Scope is an oscilloscope app for iPad, iPhone。Combined with WIFI Scope hardware, it make your iOS device to be an oscilloscope。 With iOS devices’s touch screens, it enables more natural interaction with the user interface. You can zoom in or out a waveform using your fingers. WIFI Scope must be used with WIFI Scope hardware. Feature Highlights: * Connects hardware wirelessly via Wi-fi * 2 channels * Intuitive software: pinch-to-zoom waveforms * Max 250M sample rate with 70 MHz bandwidth * 5ns/div-500s/div * FFT

Screenshots

Audio Function Generator4 screens
Voltcraft WIFI Scope1 screens

Verdict

The call

The clearest difference is in-app purchases: Voltcraft WIFI Scope at none against Audio Function Generator's 1. Voltcraft WIFI Scope also leads on iOS requirement (9.0 vs 16.0). On price, update cadence, ads 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

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

UpkeepUpdate frequency

Audio Function Generator ships an update every 6 weeks, Voltcraft WIFI Scope every 3 weeks. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.

Scorecard2 real differences · 8 level
Audio Function Generator versus Voltcraft WIFI Scope: the parameters behind the verdict, then further details
ParameterAudio Function GeneratorVoltcraft WIFI Scope
PriceFreeFree
Rating4.7 (2.2K ratings) — better—
Positive reviews77.1% of reviews—
Number of ratings2.2K — better—
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.09.0 — better
Further details — not scored
Size13 MB26 MB
Age rating4+4+
DeveloperThomas GruberCEI Conrad Electronic International (HK) Limited

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)

Voltcraft WIFI Scope

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Audio Function Generator

One-time1
  • Upgrade to PRO$9.99
None

Voltcraft WIFI Scope

No in-app purchases

Questions

Is Audio Function Generator free?
Audio Function Generator is free to download, with in-app purchases available.
Is Voltcraft WIFI Scope free?
Voltcraft WIFI Scope is free to download, with no in-app purchases.
Do Audio Function Generator or Voltcraft WIFI Scope have ads?
Neither Audio Function Generator nor Voltcraft WIFI Scope shows ads.
Which is updated more often, Audio Function Generator or Voltcraft WIFI Scope?
Audio Function Generator ships an update every 6 weeks, and Voltcraft WIFI Scope every 3 weeks. Most recently, Audio Function Generator was updated on October 17, 2026 and Voltcraft WIFI Scope on October 2, 2026.

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