Comparison

Audio Function Generator PRO vs fjalla

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 PRO

Generate various audio test tones, including sine, square, and sawtooth waves. Explore frequency and volume sweeps, custom presets, and different types of noise. Advanced settings allow for fine-tuning signal parameters and creating complex multi-tone sequences.

Highlights
  • Generate sine, square, triangular, and sawtooth tones
  • Frequency and volume sweep generation
  • Customizable presets and configurations
  • Multiple noise types (White, Pink, Violet, etc.)
  • Advanced signal parameter control
  • Multi-tone and dual function generation
Features
Currently charting
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! AND THESE ARE THE ADVANCED SETTINGS/FEATURES: => 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 new Tutorial page: www.ee-toolkit.com/audio-function-generator

About

fjalla

Features
Read full description

fjalla: Redefining Music Streaming and Fan Engagement fjalla introduces a fresh approach to music streaming, offering unique features tailored for artists and superfans alike. At the core of fjalla's offering is a pay-per-stream model, allowing fans to directly support their favorite artists with each listen. This model ensures that artists receive more equitable compensation, while fans get access to exclusive content and early releases – two weeks before they hit other major platforms. In addition to music streaming, fjalla integrates a dynamic reels feature, allowing artists to share short-form video content directly within their fans. This encourages deeper fan engagement and offers artists a creative way to connect with their audience beyond just audio. Key Features: - Exclusive Early Releases: Superfans gain access to new music two weeks ahead of general release on other platforms. - Pay-Per-Stream Model: A fairer and more transparent way for fans to support their favorite artists directly. - Reels Integration: Create, share, and engage with short videos that bring the music experience to life. - Community Engagement: Become part of a thriving fan community where artists, music lovers & superfans connect in new, meaningful ways. With fjalla, music is more than just a stream – it's an immersive experience.

Screenshots

Audio Function Generator PRO4 screens
fjalla3 screens

Verdict

The call

The clearest difference is price: fjalla at Free against Audio Function Generator PRO's $9.99. fjalla also leads on update cadence (weekly vs every 6 weeks). Audio Function Generator PRO's advantage is in-app purchases (none vs 5) and chart position (#65 vs unranked). On ads, device support and iOS requirement 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

fjalla is free to download; Audio Function Generator PRO costs $9.99 up front. fjalla sells 5 one-off in-app purchases. Audio Function Generator PRO asks for nothing beyond the download.

UpkeepUpdate frequency

Audio Function Generator PRO ships an update every 6 weeks, fjalla weekly. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

Scorecard4 real differences · 7 level
Audio Function Generator PRO versus fjalla: the parameters behind the verdict, then further details
ParameterAudio Function Generator PROfjalla
Price$9.99Free — better
Rating4.8 (270 ratings) — better—
Positive reviews87.9% of reviews—
Number of ratings270 — better—
Update frequencyEvery 6 weeksWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
Best chart rank#65 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size13 MB49 MB
Age rating4+12+
DeveloperThomas GruberFjalla company

Bugs and requests

Audio Function Generator PRO

Reported bugs

6 issues
  • Volume button issues (jumps up and down, displays wrong level)
  • Update crashes on iPad Air2 when changing screens
  • App opens AppStore repeatedly after purchase
  • Buttons don't respond, settings don't keep
  • Frequencies stick, program is useless
Show 1 more
  • App stops too much

Requested features

19 requests
  • Logarithmic sweeps and frequency slider scale
  • PWM functionality
  • Terzrauschen (third-octave noise)
  • Ping-pong sweeps in Multitone windows
  • Sweeping of noise/adding noise in Multitone sweep with sweeping bandpass filter
Show 14 more
  • Audio plugin (AU, AAX, VST)
  • Responsiveness for MacBook use
  • Simultaneous recording of generated signals
  • Panning function for tones and sweeps
  • Ability to save Multitone configurations
  • Phase shift functionality
  • Higher frequency range (up to 24kHz)
  • Dual mode sweep function
  • Taper function
  • Extended time for sweeps (6-8 hours)
  • Ability to stay at selected frequency for several minutes
  • Spectrum analyzer
  • Separate control for left and right channels
  • 8-hour program for sleep entrainment

fjalla

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Audio Function Generator PRO

No in-app purchases

5 purchases

fjalla

One-time5
  • 49 Streams$1.00
  • 98 Streams$2.00
  • 245 Streams$4.00
Show 2 more
  • 721 Streams$14.00
  • 1021 Streams$19.99

Questions

Is Audio Function Generator PRO free?
Audio Function Generator PRO costs $9.99, with no in-app purchases.
Is fjalla free?
fjalla is free to download, with in-app purchases available.
Do Audio Function Generator PRO or fjalla have ads?
Neither Audio Function Generator PRO nor fjalla shows ads.
Which is updated more often, Audio Function Generator PRO or fjalla?
Audio Function Generator PRO ships an update every 6 weeks, and fjalla weekly. Most recently, Audio Function Generator PRO was updated on October 17, 2026 and fjalla on October 6, 2026.

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