Comparison

Signals Generator vs Shielding Tester

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

Shielding Tester

Features
Read full description

Shielding Tester is designed for quick testing of shielding boxes, cases, bags, and other devices that block radio signals based on the Faraday cage principle. The application measures signal strengths across a range of mobile communication standards, including GSM/2G/3G/4G/5G, Wi-Fi 2.4/5 GHz, and Bluetooth. It provides insights on how effectively these devices block radio signals across various frequencies, assisting in the verification of the performance of Faraday cage devices and accessories. ‣ Test the effectiveness of your Faraday cage within a minute; ‣ Get test results on cellular, Wi-Fi, and Bluetooth frequencies; ‣ Sign in to unlock access to advanced features. FARADAY CAGE ASSESSMENT Determine the effectiveness of your signal-blocking gear! - Open the app. - Initiate the test. - Place your phone inside the Faraday enclosure. - Listen for the sound indication of test completion. - Receive information on your shielding sleeve, box, or bag's efficiency. PERSONAL DASHBOARD Access your account to explore extra features! Store your test results and forward them via email. SHOP In case your Faraday cage underperforms and permits signal leakage, you have the convenience to acquire a tested and guaranteed shielding solution directly from the app. DISCLAIMER On iOS 11 and later, the measurement approach used by the app may exhibit a potential deviation of ±5 dBm. Please be aware that the results provided are approximations, intended to offer a general idea of signal levels and shielding performance, rather than exact measurements.

Screenshots

Signals Generator4 screens
Shielding Tester4 screens

Verdict

The call

The clearest difference is in-app purchases: Shielding Tester at none against Signals Generator's 14. Shielding Tester also leads on update cadence (every 7 months vs every 33 months). Signals Generator's advantage is device support (4 vs 2). On price, ads and iOS requirement 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. Shielding Tester asks for nothing beyond the download.

UpkeepUpdate frequency

Signals Generator ships an update every 33 months, Shielding Tester every 7 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Signals Generator versus Shielding Tester: the parameters behind the verdict, then further details
ParameterSignals GeneratorShielding Tester
PriceFreeFree
Rating4.7 (30 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings30 — better—
Update frequencyEvery 33 monthsEvery 7 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS15.615.6
Further details — not scored
Size15 MB13 MB
Age rating4+4+
Developer怀卫 张Velter KZ

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

Shielding Tester

No in-app purchases

Questions

Is Signals Generator free?
Signals Generator is free to download, with in-app purchases available.
Is Shielding Tester free?
Shielding Tester is free to download, with no in-app purchases.
Do Signals Generator or Shielding Tester have ads?
Neither Signals Generator nor Shielding Tester shows ads.
Which is updated more often, Signals Generator or Shielding Tester?
Signals Generator ships an update every 33 months, and Shielding Tester every 7 months. Most recently, Signals Generator was updated on October 24, 2026 and Shielding Tester on October 25, 2026.

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