Comparison

Audio Function Generator vs SereniBrain

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

SereniBrain

This tool uses brain-computer interface technology to guide users through meditation scenarios. It helps individuals learn meditation techniques to achieve relaxation for both body and mind. The app provides assessments, real-time feedback, and detailed analysis reports.

Highlights
  • Meditation State Assessment
  • Real-time Neural Feedback
  • Meditation Analysis Reports
  • Premium Practice Content
Features
Read full description

"SereniBrain" is a tool that integrates brain-computer interface technology with meditation scenarios, aimed at helping more people learn meditation and relax both body and mind. App Features: Meditation State Assessment, Real-time Neural Feedback, Meditation Analysis Reports, Premium Practice Content.

Screenshots

Audio Function Generator4 screens
SereniBrain4 screens

Verdict

The call

The clearest difference is in-app purchases: SereniBrain at none against Audio Function Generator's 1. SereniBrain also leads on review sentiment (100% vs 77%). Audio Function Generator's advantage is ratings volume (2.2K vs 13). On price, rating, update cadence and ads 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. SereniBrain asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Audio Function Generator against 4.7 for SereniBrain. That said, the two scores are not equally well evidenced: Audio Function Generator has 2.2K ratings behind it against 13, so its average is the more settled of the two. Written reviews are what separate them: 77% of Audio Function Generator's written reviews are positive against 100% of SereniBrain's.

UpkeepUpdate frequency

Audio Function Generator ships an update every 6 weeks, SereniBrain every 4 weeks. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

Scorecard4 real differences · 6 level
Audio Function Generator versus SereniBrain: the parameters behind the verdict, then further details
ParameterAudio Function GeneratorSereniBrain
PriceFreeFree
Rating4.7 (2.2K ratings)4.7 (13 ratings)
Positive reviews77.1% of reviews100.0% of reviews — better
Number of ratings2.2K — better13
Update frequencyEvery 6 weeksEvery 4 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.514.0 — better
Further details — not scored
Size14 MB341 MB
Age rating4+12+
DeveloperThomas Gruber华南脑控(广东)智能科技有限公司

Customer experience

Audio Function Generator

All ratings2,191 ratings
Positive91.8%
Neutral3.1%
Negative5.1%
Written reviews271 reviews
Positive77.1%
Neutral6.3%
Negative16.6%

SereniBrain

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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)

SereniBrain

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

SereniBrain

No in-app purchases

Questions

Is Audio Function Generator free?
Audio Function Generator is free to download, with in-app purchases available.
Is SereniBrain free?
SereniBrain is free to download, with no in-app purchases.
Which has better reviews, Audio Function Generator or SereniBrain?
Audio Function Generator and SereniBrain are both rated 4.7 out of 5 on the App Store, from 2.2K and 13 ratings respectively.
Do Audio Function Generator or SereniBrain have ads?
Neither Audio Function Generator nor SereniBrain shows ads.
Which is updated more often, Audio Function Generator or SereniBrain?
Audio Function Generator ships an update every 6 weeks, and SereniBrain every 4 weeks. Most recently, Audio Function Generator was updated on October 10, 2026 and SereniBrain on October 6, 2026.

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