Audio Function Generator vs Spectrum Compact Simulator
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)
Read full descriptionHide 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
Spectrum Compact Simulator
Explore the functionality of a handheld microwave spectrum analyzer through a realistic simulation. This application demonstrates how to perform antenna alignment, troubleshooting, and maintenance with ease and speed.
- Simulates handheld microwave spectrum analyzer
- Demonstrates real microwave radio spectrum data
- Facilitates antenna alignment
- Aids in troubleshooting
- Supports maintenance tasks
Read full descriptionHide full description
SAF Spectrum Compact Simulator application was created for you to discover and experience the ease of use of the world's first handheld microwave spectrum analyzer. The application demonstrate full set of SAF Spectrum Compact functions by simulating real microwave radio spectrum data. The device makes the antenna alignment, troubleshooting and maintenance as easy and fast as never before!
Screenshots
Verdict
The clearest difference is rating: Audio Function Generator at 4.7 against Spectrum Compact Simulator's 1.0. Audio Function Generator also leads on ratings volume (2.2K vs 1). Spectrum Compact Simulator's advantage is in-app purchases (none vs 1) and iOS requirement (7.1 vs 15.5). 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. Spectrum Compact Simulator asks for nothing beyond the download.
Audio Function Generator holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 1, so its average is the more settled of the two.
Audio Function Generator ships an update every 6 weeks, Spectrum Compact Simulator every 2 months. The most recent releases landed on October 5, 2026 and September 18, 2026 respectively.
| Parameter | Audio Function Generator | Spectrum Compact Simulator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (2.2K ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 77.1% of reviews | — |
| Number of ratings | 2.2K — better | 1 |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.5 | 7.1 — better |
| Further details — not scored | ||
| Size | 14 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Gruber | SAF Tehnika AS |
Customer experience
Audio Function Generator
Spectrum Compact Simulator
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 moreShow fewer
- Improve accessibility (VoiceOver support)
Spectrum Compact Simulator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Audio Function Generator
- Upgrade to PRO$9.99
Spectrum Compact Simulator
No in-app purchases
Questions
Is Audio Function Generator free?
Is Spectrum Compact Simulator free?
Which has better reviews, Audio Function Generator or Spectrum Compact Simulator?
Do Audio Function Generator or Spectrum Compact Simulator have ads?
Which is updated more often, Audio Function Generator or Spectrum Compact Simulator?
Other comparisons















