Comparison

Tone Generator EX vs Signals Generator

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

Head to head
About

Tone Generator EX

Generate a wide range of audio tones with adjustable frequencies and waveforms. Control playback in the background, from your notification drawer, or lock screen. The app automatically pauses for calls and alarms, and allows you to save custom presets.

Highlights
  • Frequency range 15Hz to 22KHz
  • Sine, Square, Sawtooth, Triangle waveforms
  • Auto-off timer
  • Background playback
  • Notification drawer control
  • Create custom presets
  • Set frequency by music note
Features
Read full description

Tone Generator EX is an audio tone generator. It provides following features: ● Frequency range from 15Hz to 22KHz. ● Can play 4 different waveforms: Sine/Square/Sawtooth/Triangle  ● Auto-off timer. ● Playback running in background. ● Playback can be controlled from the notification drawer, lock screen or headset button without having to reopen the APP. ● Auto-pause on incoming call, alarm, etc. ● You can create your own presets. ● Set frequency by selecting a music note.

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.

Screenshots

Tone Generator EX3 screens
Signals Generator4 screens

Verdict

The call

The clearest difference is in-app purchases: Tone Generator EX at none against Signals Generator's 14. Tone Generator EX also leads on update cadence (every 9 days vs every 33 months) and review sentiment (91% vs 67%). Signals Generator's advantage is ads (none vs shown). On price, rating and device support 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. Tone Generator EX asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Tone Generator EX against 4.7 for Signals Generator. That said, the two scores are not equally well evidenced: Tone Generator EX has 529 ratings behind it against 30, so its average is the more settled of the two. Written reviews are what separate them: 91% of Tone Generator EX's written reviews are positive against 67% of Signals Generator's.

UpkeepUpdate frequency

Tone Generator EX ships an update every 9 days, Signals Generator every 33 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard7 real differences · 3 level
Tone Generator EX versus Signals Generator: the parameters behind the verdict, then further details
ParameterTone Generator EXSignals Generator
PriceFreeFree
Rating4.8 (529 ratings) — better4.7 (30 ratings)
Positive reviews90.7% of reviews — better66.7% of reviews
Number of ratings529 — better30
Update frequencyEvery 9 days — betterEvery 33 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS10.0 — better15.6
Further details — not scored
Size29 MB15 MB
Age rating4+4+
DeveloperAn-Che Lee怀卫 张

Customer experience

Tone Generator EX

All ratings439 ratings
Positive95.7%
Neutral1.6%
Negative2.7%
Written reviews54 reviews
Positive90.7%
Neutral1.9%
Negative7.4%

Signals Generator

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

Bugs and requests

Tone Generator EX

Reported bugs

3 issues
  • App crashes and won't play after initial use
  • Requires unnecessary credit card information
  • Potential compatibility issues with newer iOS versions

Requested features

15 requests
  • Extend frequency range to 10Hz or lower (0-12Hz requested)
  • Extend upper frequency range to support .4-12Hz adjustments
  • Direct frequency input by typing instead of dial adjustment
  • VST3/AUv3/desktop plugin version for DAW integration
  • Frequency sweep functionality with adjustable speed
Show 10 more
  • Automated frequency sweep with smooth ascending/descending
  • Export generated tones to audio files
  • Stereo output capability
  • Automatic numerical sorting of presets
  • Play presets directly from list with individual play buttons
  • Output level attenuator in dB
  • Option to disable clicking sounds during frequency changes
  • Dual tone generation (play two frequencies simultaneously)
  • Paid ad-free version option
  • Duty cycle control for square waves

Signals Generator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Tone Generator EX

No 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

Questions

Is Tone Generator EX free?
Tone Generator EX is free to download, with no in-app purchases.
Is Signals Generator free?
Signals Generator is free to download, with in-app purchases available.
Which has better reviews, Tone Generator EX or Signals Generator?
Tone Generator EX is rated higher. Tone Generator EX averages 4.8 out of 5 from 529 ratings, while Signals Generator averages 4.7 from 30 ratings.
Do Tone Generator EX or Signals Generator have ads?
Tone Generator EX shows ads; Signals Generator does not.
Which is updated more often, Tone Generator EX or Signals Generator?
Tone Generator EX ships an update every 9 days, and Signals Generator every 33 months. Most recently, Tone Generator EX was updated on October 23, 2026 and Signals Generator on October 24, 2026.

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