# Signals Generator — Dual channel signal generator

> Dual-channel handheld signal generator for sound and audio electric signals. (iPhone/iPad app by 怀卫 张.)

- Source: https://appshunter.io/ios/app/signals-generator/id1526653387 (this page in markdown: same URL + `.md`)
- Developer: [怀卫 张](https://appshunter.io/developer/1252544375)
- Category: Utilities, Music
- Price: Free with in-app purchases
- Rating: 4.70/5 from 28 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 15 MB
- Languages: American English, French (France), German (Germany), Italian, European Portuguese, Russian, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2020-10-23
- Data updated: 2026-08-19
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/signals-generator/id1526653387/reviews.md

## What is Signals Generator?

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.

## Key features

- Dual-channel signal generation
- Multiple waveform types
- Adjustable amplitude, frequency, and phase
- Independent channel control
- Zoomable waveform display
- Interface color selection

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Sine Wave | $0.99 | one-time |
| Square Wave | $0.99 | one-time |
| Gaussian Noise | $0.99 | one-time |
| Uniformly distributed noise | $0.99 | one-time |
| Pink Noise | $0.99 | one-time |
| Red (brown) noise | $0.99 | one-time |
| Maximum Length Sequence | $0.99 | one-time |
| All Noise Signals | $3.99 | one-time |
| All type of signals | $7.99 | one-time |
| Functional Wave | $2.99 | one-time |
| Sweep Signal | $2.99 | one-time |
| Rayleigh Noise | $0.99 | one-time |
| Sawtooth Wave | $0.99 | one-time |
| Gamma Noise | $0.99 | one-time |


## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/signals-generator/id1526653387/reviews.md

### 3/5 — Simple but limited

*2023-10-06*

App feels simple and easy enough to use. 
Sine wave appears to be the only avalible signal without in app purchases.

### 5/5 — Best signal generator

*2023-01-29*

This is awesome for professional use and the everyday person that is into electronics will recommend to use and upgrade to get even a better experience..

### 4/5 — Похожего я не видел

*2021-02-02*

Плохой перевод и судя по всему шум не генерируется а воспроизводится из зацикленной записи( или график в приложении так заставляет думать)

## Frequently asked questions about Signals Generator

### What types of signals can Signals Generator produce?

Signals Generator can produce sine wave, triangle wave, sawtooth wave, rectangular wave, various noise types (Gaussian, Rayleigh, gamma, salt and pepper, uniform, pink, red, blue, purple), long sequence signals, sweep frequency signals, and functional signals.

### Can Signals Generator be used for circuit measurement?

Yes, professionals can use Signals Generator for circuit measurement. The audio signal is output through the left and right channels of the earphone. However, users must have sufficient professional knowledge and take safety precautions, especially with high-voltage circuits.

### How does the dual-channel functionality work in Signals Generator?

In dual-channel mode, you can independently set the waveform and its parameters for each channel. This allows for more complex signal generation and testing scenarios.

### What parameters can be adjusted for the generated signals?

You can adjust the signal's amplitude, frequency, and phase parameters. The waveform display can also be freely zoomed using gestures or buttons for detailed analysis.

### Is Signals Generator free to use?

Signals Generator is free to download and use. It also offers in-app purchases for additional features or content.

### Does Signals Generator have ads?

No, Signals Generator does not contain advertisements, as indicated by the 'hasAds' flag being false.

### What devices is Signals Generator compatible with?

Signals Generator is available for Mac, iPhone, iPad, and iPod, making it versatile across Apple devices.

### How often is Signals Generator updated?

The latest version, 1.1, was released on December 17, 2021. The app was initially released on October 23, 2020, suggesting updates are not extremely frequent but are provided.

## Version history (last 3 releases)

### 1.2 — 2026-04-04

Add hand-drawn waveforms, allowing you to freely create any waveform you desire. Compatible with new operating systems and devices.

### 1.1 — 2021-12-17

Add functional waveform, you can use any elementary function to generate a waveform signal.

### 1.0 — 2020-10-24

No release notes.

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## More apps by 怀卫 张

- [Precise Guitar Tuner](https://appshunter.io/ios/app/precise-guitar-tuner/id1260544519)
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- [Urheen Tuner](https://appshunter.io/ios/app/urheen-tuner/id1260952097)
- [Accurate Violin Tuner](https://appshunter.io/ios/app/accurate-violin-tuner/id1261308157)
- [Accurate Viola Tuner](https://appshunter.io/ios/app/accurate-viola-tuner/id1261657228)
- [Accurate Cello Tuner](https://appshunter.io/ios/app/accurate-cello-tuner/id1261668578)

All apps by 怀卫 张: https://appshunter.io/developer/1252544375

## Related topics

[test signal generator](https://appshunter.io/ios/topics/test-signal-generator) · [signal generator](https://appshunter.io/ios/topics/signal-generator) · [function generator](https://appshunter.io/ios/topics/function-generator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-19.*