Comparison

Signals Generator vs Signal (intercom)

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

Signal (intercom)

This app provides a simple intercom system for quick communication. Create or join a "Signal" to use pre-set buttons for instant messaging in specific scenarios, avoiding unnecessary noise or lengthy conversations.

Highlights
  • Create or join communication 'Signals'
  • Use quick communication buttons
  • Instant messaging for specific scenarios
  • Minimalist design
  • Hypothetical use case examples
Features
Read full description

Absolutely minimal intercom system. Create a "Signal" or join someone else's, then use quick communication buttons in situations where it might be useful! Like, strictly hypothetically, when your wife yells up to you in your office that "TEA IS READY", and your dog starts barking until you come down - now, she can simply press the "TEA IS READY" button, you can respond with the "COMING" button, and no barking will ensue!

Screenshots

Signals Generator4 screens
Signal (intercom)3 screens

Verdict

The call

The clearest difference is in-app purchases: Signal (intercom) at none against Signals Generator's 14. Signal (intercom) also leads on review sentiment (100% vs 67%) and update cadence (every 2 days vs every 33 months). On price, rating, ratings volume 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. Signals Generator sells 14 one-off in-app purchases. Signal (intercom) 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 Signals Generator against 4.7 for Signal (intercom). Both are backed by a comparable volume of ratings — 29 and 11 respectively. Written reviews are what separate them: 67% of Signals Generator's written reviews are positive against 100% of Signal (intercom)'s.

UpkeepUpdate frequency

Signals Generator ships an update every 33 months, Signal (intercom) every 2 days. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

Scorecard5 real differences · 5 level
Signals Generator versus Signal (intercom): the parameters behind the verdict, then further details
ParameterSignals GeneratorSignal (intercom)
PriceFreeFree
Rating4.7 (29 ratings)4.7 (11 ratings) — better
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings29 — better11
Update frequencyEvery 33 monthsEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.612.0 — better
Further details — not scored
Size15 MB38 MB
Age rating4+4+
Developer怀卫 张Matthew Takao

Customer experience

Signals Generator

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

Signal (intercom)

All ratings11 ratings
Positive90.9%
Neutral9.1%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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
None

Signal (intercom)

No in-app purchases

Questions

Is Signals Generator free?
Signals Generator is free to download, with in-app purchases available.
Is Signal (intercom) free?
Signal (intercom) is free to download, with no in-app purchases.
Which has better reviews, Signals Generator or Signal (intercom)?
Signal (intercom) is rated higher. Signals Generator averages 4.7 out of 5 from 29 ratings, while Signal (intercom) averages 4.7 from 11 ratings.
Do Signals Generator or Signal (intercom) have ads?
Neither Signals Generator nor Signal (intercom) shows ads.
Which is updated more often, Signals Generator or Signal (intercom)?
Signals Generator ships an update every 33 months, and Signal (intercom) every 2 days. Most recently, Signals Generator was updated on October 7, 2026 and Signal (intercom) on October 1, 2026.

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