Audio Function Generator vs TrueEntropy
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
TrueEntropy
This app leverages your smartphone's camera to produce genuine random numbers by capturing thermal noise. It generates a high volume of entropy, suitable for cryptographic purposes, and can output data locally or remotely.
- Generate true random numbers from thermal noise
- Utilizes smartphone camera sensor
- High volume entropy generation
- Output binary files locally
- Send entropy via cryptographic relays
- Continuous generation mode
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TrueEntropy uses your phone's camera to generate true random numbers derived from thermal noise. The camera in your smartphone is so advanced that it can detect even the smallest variations produced by fundamental particle physics. We capture thermal variations in every pixel of your phone's camera to create a powerful, high volume entropy random number generator. No need to move your phone - even if your phone is resting on a desktop, it is able to pick up a sufficient quantity of thermal variations to generate random numbers at a rate of 18Mb per minute. - Generate binary files for local use via AirDrop - Send entropy to a destination machine via cryptographic relays - Continuous generation mode to constantly reseed target machines
Screenshots
Verdict
The clearest difference is in-app purchases: TrueEntropy at none against Audio Function Generator's 1. TrueEntropy also leads on iOS requirement (12.0 vs 15.5). Audio Function Generator's advantage is update cadence (every 6 weeks vs every 41 months) and ratings volume (2.2K vs 11). On price, 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. TrueEntropy asks for nothing beyond the download.
Audio Function Generator holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 77% of Audio Function Generator's written reviews are positive against 67% of TrueEntropy's.
Audio Function Generator ships an update every 6 weeks, TrueEntropy every 41 months. The most recent releases landed on October 10, 2026 and September 23, 2026 respectively.
| Parameter | Audio Function Generator | TrueEntropy |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (2.2K ratings) — better | 4.5 (11 ratings) |
| Positive reviews | 77.1% of reviews — better | 66.7% of reviews |
| Number of ratings | 2.2K — better | 11 |
| Update frequency | Every 6 weeks — better | Every 41 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 | 12.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Gruber | Vault12, Inc. |
Customer experience
Audio Function Generator
TrueEntropy
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)
TrueEntropy
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Audio Function Generator
- Upgrade to PRO$9.99
TrueEntropy
No in-app purchases
Questions
Is Audio Function Generator free?
Is TrueEntropy free?
Which has better reviews, Audio Function Generator or TrueEntropy?
Do Audio Function Generator or TrueEntropy have ads?
Which is updated more often, Audio Function Generator or TrueEntropy?
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