Comparison

Signals Generator vs Granula Synth

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Signals Generator

Transform your mobile device into a dual-channel signal generator for sound and audio electric signals. Offers a wide variety of waveform types and customizable parameters like amplitude, frequency, and phase. Ideal for professionals and hobbyists for signal generation and circuit measurement.

Highlights
  • Dual-channel signal generation
  • Multiple waveform types
  • Adjustable amplitude, frequency, and phase
  • Independent channel control
  • Zoomable waveform display
  • Interface color selection
Features
Read full description

This app transforms your phone into a powerful handheld dual-channel signal generator for generating sound signals (and can also be used by professionals to generate audio electrical signals). Signal types include: sine wave, triangular wave, sawtooth wave, rectangular wave, Gaussian noise, Rayleigh noise, gamma noise, salt-and-pepper noise, uniformly distributed noise, pink noise, red (brown) noise, blue noise, purple noise, longest sequence signal, frequency-sweep signal, elementary function waveform, and hand-drawn waveform. It can switch between single-channel and dual-channel operation; the dual channels can independently set waveforms and their parameters. The parameters of the signal, such as amplitude, frequency, and phase, can be adjusted. The waveform can be scaled freely using gestures or buttons, making it simple and easy to use. Support interface color selection. This application is normally used to generate sound signals and poses no risks. Special instructions for circuit measurement: Professionals can utilize this application for circuit measurements, with audio electrical signals being output through the left and right channels of headphones. Please ensure safety: You must possess sufficient professional knowledge, and isolation equipment must be added to high-voltage circuits. Circuit measurement involves risks. The author of this application will not be responsible for any personal or equipment damage caused by the correct or incorrect use of this application.

About

Granula Synth

Explore new soundscapes by manipulating granular audio. This app offers a library of presets, custom sound import, and extensive parameter adjustments for unique music creation. Save your settings and share your sonic experiments.

Highlights
  • Granular sound manipulation
  • Preset library
  • Custom sound import
  • Parameter adjustment
  • Save user settings
  • Share audio recordings
Features
Read full description

Push the boundaries of sound design. Granula Synth turns granular synthesis into a playground — grab tiny grains of audio, scatter them across the waveform, and shape them into pads, textures, and soundscapes no other synth can make. What's inside: - Curated preset library, crafted by sound designers - Deep grain controls — length, position, direction, pitch, and more - Powerful modulation matrix with dual LFOs and chaos generators - Built-in envelope, EQ, and FX chain - Import your own audio or record directly in the app - Save, organize, and share your presets - Export your ideas straight to your DAW Whether you're scoring film, building ambient textures, or just exploring new sonic territory, Granula Synth gives you granular control over every grain of sound. Privacy Policy: https://sites.google.com/view/castles-trip-privacy-policy Terms of Use: https://sites.google.com/view/granula-tos

Screenshots

Signals Generator4 screens
Granula Synth4 screens

Verdict

The call

The clearest difference is review sentiment: Signals Generator at 67% against Granula Synth's 20%. Signals Generator also leads on rating (4.7 vs 1.8) and ratings volume (30 vs 4). Granula Synth's advantage is iOS requirement (12.0 vs 15.6). On price, update cadence, ads and in-app purchases 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. Signals Generator sells 14 one-off in-app purchases and Granula Synth sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Signals Generator holds the better App Store score, 4.7 against 1.8. That said, the two scores are not equally well evidenced: Signals Generator has 30 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 67% of Signals Generator's written reviews are positive against 20% of Granula Synth's.

UpkeepUpdate frequency

Signals Generator ships an update every 33 months, Granula Synth every 25 months. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

Scorecard4 real differences · 6 level
Signals Generator versus Granula Synth: the parameters behind the verdict, then further details
ParameterSignals GeneratorGranula Synth
PriceFreeFree
Rating4.7 (30 ratings) — better1.8 (4 ratings)
Positive reviews66.7% of reviews — better20.0% of reviews
Number of ratings30 — better4
Update frequencyEvery 33 monthsEvery 25 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.612.0 — better
Further details — not scored
Size15 MB75 MB
Age rating4+4+
Developer怀卫 张Stanislav Duplinskiy

Customer experience

Signals Generator

All ratings29 ratings
Positive89.7%
Neutral6.9%
Negative3.4%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

Granula Synth

All ratings4 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews5 reviews
Positive20.0%
Neutral20.0%
Negative60.0%

In-app purchases

14 purchases

Signals Generator

One-time14
  • Sine Wave$0.99
  • Square Wave$0.99
  • Gaussian Noise$0.99
Show 11 more
  • Uniformly distributed noise$0.99
  • Pink Noise$0.99
  • Red (brown) noise$0.99
  • Maximum Length Sequence$0.99
  • Rayleigh Noise$0.99
  • Sawtooth Wave$0.99
  • Gamma Noise$0.99
  • Functional Wave$2.99
  • Sweep Signal$2.99
  • All Noise Signals$3.99
  • All type of signals$7.99
3 purchases

Granula Synth

Subscriptions3
  • Access to app features3 Days trial$2.991 Month
  • Access to app features3 Days trial$7.493 Months
  • Access to app features3 Days trial$8.996 Months

Questions

Is Signals Generator free?
Signals Generator is free to download, with in-app purchases available.
Is Granula Synth free?
Granula Synth is free to download, with in-app purchases available.
Which has better reviews, Signals Generator or Granula Synth?
Signals Generator is rated higher. Signals Generator averages 4.7 out of 5 from 30 ratings, while Granula Synth averages 1.8 from 4 ratings.
Do Signals Generator or Granula Synth have ads?
Neither Signals Generator nor Granula Synth shows ads.
Which is updated more often, Signals Generator or Granula Synth?
Signals Generator ships an update every 33 months, and Granula Synth every 25 months. Most recently, Signals Generator was updated on October 24, 2026 and Granula Synth on October 18, 2026.

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