Best Test Signal Generator Apps

249+ iOS apps curated and reviewed

4.5 avg rating
15 free apps
Updated August 2026

Out of 249+ test signal generator apps on iOS, 15 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Test Signal Generator Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Test Signal GeneratorTest Signal GeneratorFreeNoYesJul 2026
2Audio Function GeneratorAudio Function GeneratorFree4.7★ (2.2K)NoYesAug 2026
3Signals GeneratorSignals GeneratorFree4.7★ (28)NoYesAug 2026
4Signal Generator - WaveSignal Generator - Wave$0.994.6★ (10)NoNoAug 2026
5GeneratorGenerator$8.993.3★ (3)NoNoAug 2026
6AdvancedSignalGeneratorAdvancedSignalGeneratorFreeNoNoJun 2026
7PSG9000 Signal GeneratorPSG9000 Signal GeneratorFreeNoNoMay 2026
8SignalProof: Tone GeneratorSignalProof: Tone GeneratorFreeNoNoJul 2026

Top Picks for Test Signal Generator

Audio Function Generator#2

Audio Function Generator by Thomas Gruber

Frequency and Signal Generator
Strong Contender
🔧 Utilities
4.7😐(2.2K ratings)
FreeIn-App Purchases
Audio Function Generator screenshot 1
Audio Function Generator screenshot 2
Audio Function Generator screenshot 3
Audio Function Generator screenshot 4
Audio Function Generator screenshot 5
Audio Function Generator screenshot 6

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.

What We Love

  • 👍 Great app
  • 🎶 Helps with Tinnitus
  • 💯 Best app I've paid for
  • 🔍 Highly recommended

Room to Improve

  • 🐛 Crashes
  • 💰 Deceptive/Money hungry
  • 🔒 Basic features paywalled
Signals Generator#3

Signals Generator by 怀卫 张

Dual channel signal generator
Worth Considering
🔧 Utilities
4.7(28 ratings)
FreeIn-App Purchases
Signals Generator screenshot 1
Signals Generator screenshot 2
Signals Generator screenshot 3
Signals Generator screenshot 4
Signals Generator screenshot 5
Signals Generator screenshot 6

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.

More Test Signal Generator apps to explore

4
Signal Generator - Wave
Signal Generator - Wave
Signal Generator - Wave
Sine Rect White Pink Generator
$0.99

Generate high-quality audio signals including sine, square, triangle, sawtooth waves, and white/pink noise. Ideal for testing audio systems, frequency response, and hearing capabilities.

Sine wave generationSquare wave generationWhite noise generation
🔧 Utilities
(10)
paid
5
Generator
Generator
Generator
Audio Signal Generator
$8.99

Generate professional-grade audio signals like sine waves, square waves, and various noise types. Offers precise frequency control and remote operation via WiFi. Ideal for audio testing and production.

Sine, square, white noise, and pink noise generationPrecise frequency control (20Hz-20kHz)Octave, 1/3 octave, and fine frequency resolution
🎵 Music
(3)
paid
6
AdvancedSignalGenerator
AdvancedSignalGenerator
AdvancedSignalGenerator
by ALWIN ARUL ALEXANDER
Free
📊 Productivity
(0)
7
PSG9000 Signal Generator
PSG9000 Signal Generator
PSG9000 Signal Generator
JUNTEK
Free

This software allows users to control a programmable function and arbitrary wave signal generator. It can generate various waveforms up to 80MHz, with features like modulation, frequency sweep, and signal measurement. All output signal parameters are displayed simultaneously.

Generate sine, square, triangle, pulse, and arbitrary wavesFrequency range up to 80MHzModulation and frequency sweep functions
🔧 Utilities
(0)
free
8
SignalProof: Tone Generator
SignalProof: Tone Generator
SignalProof: Tone Generator
Test Tones, Noise, Sweeps
Free
🔧 Utilities
(0)
9
Audio Function Generator PRO
Audio Function Generator PRO
Audio Function Generator PRO
Frequency and Signal Generator
$12.99

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.

Generate sine, square, triangular, and sawtooth tonesFrequency and volume sweep generationCustomizable presets and configurations
🎵 Music
(266)
free
10
Freq'n Awesome Tone Generator
Freq'n Awesome Tone Generator
Freq'n Awesome Tone Generator
Speaker & Audio Test Tones
Free
🔧 Utilities
(0)
11
Tone Generator: Audio Sound Hz
Tone Generator: Audio Sound Hz
Tone Generator: Audio Sound Hz
Generate Audio Frequency Waves
Free

Create pure sine wave audio tones across a wide frequency range. This tool is ideal for tuning instruments, conducting hearing tests, performing science experiments, and testing audio equipment. Easily adjust frequencies and volume, with support for AirPlay devices.

Generate sine wave tonesFrequency range 20Hz - 22,000HzInstrument tuning
🎵 Music
(2.6K)
ad-supported
12
Frequency: Sound Generator
Frequency: Sound Generator
Frequency: Sound Generator
by Lucija Jaksic
Free

Generate various sound waves, including sine, square, sawtooth, and triangle, with adjustable frequencies from 1Hz to 22000Hz. Visually observe animated sound waves and control volume. Useful for testing hearing, speakers, instruments, and even cleaning water from speakers.

Generate sine, square, sawtooth, triangle wavesAdjustable frequency (1Hz-22000Hz)Animated sound wave visualization
🔧 Utilities
(340)
free with in-app purchases
13
Opensignal Speed Test Ad Free
Opensignal Speed Test Ad Free
Opensignal Speed Test Ad Free
5G 4G & WiFi Signal Speed Test
Free

Measure your mobile network performance with detailed speed tests for download, upload, and latency across 3G, 4G/LTE, 5G, and WiFi. Analyze video streaming quality and compare network coverage in your area to find the best provider.

Download, upload, and latency speed testsVideo streaming quality analysisNetwork coverage comparison
🔧 Utilities
(18K)
free
14
Tone generator
Tone generator
Tone generator
by michael heinz
Free

Create various periodic signals with adjustable frequency and amplitude for testing electronic circuits or tuning instruments. Features include a metronome, a real-time tuner, and options for generating different noise types and tone sequences. It also offers unique features for hearing tests and party games.

Generate periodic signalsAdjustable frequency and amplitudeIntegrated instrument tuner
🔧 Utilities
(152)
free with in-app purchases
15
Audio Tone Generator Plus
Audio Tone Generator Plus
Audio Tone Generator Plus
by TOON,LLC
$6.99
🔧 Utilities
(0)
16
Tone Generator+ Freq
Tone Generator+ Freq
Tone Generator+ Freq
Sine Wave Sound Maker
Free

Generate precise audio tones with various waveforms for testing, calibration, and experiments. Offers a wide frequency range and adjustable volume in a simple interface.

Precise frequency generationMultiple waveform types (sine, square, sawtooth, triangle)Adjustable volume control
🔧 Utilities
(1)
ad-supported
17
Tone Generator
Tone Generator
Tone Generator
by Rick Peacock
$0.99
🎵 Music
(0)
18
SignalGeneratorApp
SignalGeneratorApp
SignalGeneratorApp
This App generate audio wave
Free
🎵 Music
(0)
19
Shielding Tester
Shielding Tester
Shielding Tester
Faraday Cage Express Test
Free
🔧 Utilities
(0)
20
Frequency Generator - Sound Hz
Frequency Generator - Sound Hz
Frequency Generator - Sound Hz
Tone Generator & Speaker Test
Free
🔧 Utilities
(0)

FAQ about Test Signal Generator

Are there free test signal generator apps for iPhone?
Yes — 15 of the top test signal generator apps we rank are free to download, including Test Signal Generator and Audio Function Generator.
Test Signal Generator has no ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 249+ test signal generator apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.