Audio Function Generator vs Klangkraft Sidekick
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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)
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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
Klangkraft Sidekick
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Sidekick is the mobile companion app for Klangkraft Tools. Built for live sound engineers who do not want to open a laptop in the middle of a show. Sidekick gives you the exact information and tools you need on your iPhone — accessible with one hand in under 10 seconds. All important data is synced directly from your current job and stored locally on the device. That means everything stays available anytime — even without Wi-Fi, internet access or your own server infrastructure. FEATURES PATCH LISTS Keep the current patch list of your job always within reach. Available offline for quick notes and changes directly on stage. STAGE PLOTS Display stage plots directly on your iPhone and quickly show them to musicians, technicians or venue staff. TECH RIDERS Access all technical requirements instantly for conversations with venues and local crews. RF FREQUENCY LISTS Keep track of your wireless setup. See which microphone is connected to which receiver at any time. TOOLS FOR EVERYDAY LIVE AUDIO • Delay calculator with temperature compensation • Ohm calculator • Reference tone generator (A440 / A442) • Sound meter for quick SPL checks SHARE DOCUMENTS Send documents directly from your current job via Mail or AirDrop. ICLOUD SYNC Sidekick uses iCloud for seamless synchronization between Mac, iPad and iPhone. Everything you create in Klangkraft automatically appears on your devices — without setup, backend servers or additional costs. BUILT FOR LIVE No bloated production software on the go. No endless menus. No searching during line check. Just the things you actually need. Fast. Direct. Offline.
Screenshots
Verdict
The clearest difference is in-app purchases: Klangkraft Sidekick at none against Audio Function Generator's 1. Audio Function Generator's advantage is iOS requirement (16.0 vs 26.0). 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
Both are free to download. Audio Function Generator sells 1 one-off in-app purchase. Klangkraft Sidekick asks for nothing beyond the download.
Audio Function Generator ships an update every 6 weeks, Klangkraft Sidekick every 2 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.
| Parameter | Audio Function Generator | Klangkraft Sidekick |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (2.2K ratings) — better | — |
| Positive reviews | 77.2% of reviews | — |
| Number of ratings | 2.2K — better | — |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 13 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Gruber | Torge Joris |
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
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- Improve accessibility (VoiceOver support)
Klangkraft Sidekick
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Audio Function Generator
- Upgrade to PRO$9.99
Klangkraft Sidekick
No in-app purchases
Questions
Is Audio Function Generator free?
Is Klangkraft Sidekick free?
Do Audio Function Generator or Klangkraft Sidekick have ads?
Which is updated more often, Audio Function Generator or Klangkraft Sidekick?
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