Comparison

Shielding Tester vs OptOutCode Easy Device Opt

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

Head to head
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.

About

OptOutCode Easy Device Opt

This utility app simplifies the process of opting out of commercial surveillance by allowing users to easily rename their devices with a specific prefix. It provides a universal and decentralized mechanism to signal a desire not to have data sold or shared, enhancing user privacy across various connected devices.

Highlights
  • Universal opt-out mechanism
  • Decentralized and privacy-preserving
  • Consumer-friendly device renaming
  • Automated opt-out switch
  • Business-friendly detection protocols
Features
Read full description

Saying “No” to commercial surveillance is as easy as renaming your device & our app makes it even easier! Invented by Privacy4Cars, OptOutCode is a new Universal Opt-Out Mechanism that only requires to add the prefix 0$S = Do Not (zero) Sell (dollar) or Share (capital letter S) as the first three letters of the name of consumers’ smartphones, computers, and wi-fi router. More info at https://optoutcode.com/ OptOutCode has four distinguishing advantages: 1. It is truly Universal: OptOutCode is compatible with smartphones, laptops, tablets,routers, the apps that run on them and the IoTs they connect to, including vehicles, smart appliances, tracking beacons, and more. 2. It’s fully decentralized: OptOutCode does not require to build, maintain, query, or secure a central database of opting-out users, devices, or apps. The signal is detected locally: either by the programs and apps running on the device that has OptOutCode turned on (e.g., an app on a smartphone), or by other devices that connect to the device of the Consumer that has OptOutCode turned on (e.g. a SmartTV connected to a Wi-Fi router with OptOutCode on, a fitness watch connected to a smartphone with OptOutCode on). This architecture makes it privacy-preserving, more secure, without a single point of failure, cheaper, and faster. 3. It’s Consumer-friendly: All Consumers need to do to turn on OptOutCode is simply rename their devices by adding “0$S” as the first three characters. For instance, rename their phone from “My Phone” to “0$S My Phone”. Most Consumers can do it themselves by going through the settings of their devices in less than a minute, but we have also written code to automate the task of turning OptOutCode on or off with a simple “switch” on an app. 4. It’s business-friendly: Businesses can easily read and parse the “0$S” opt-out code from each device using backward-compatible and future proof protocols that require no special authorizations. We want to thank Professor Sebastian Zimmeck of Wesleyan University (credited with inventing GPC) for recently pointing out to us that Google has a somewhat similar protocol to allow users to opt-out of their Wi-Fi routers’ signals to be used by Google Maps, providing an independent industry validation that a portion of the name of a device can be used as an opt-out signal. This app has three purposes: 1. It makes it even easier for consumers to turn on OptOutCode on their iOS devices 2. It demonstrates how easy it is for companies who make apps (social media, gaming, dating, mapping, etc.) to detect OptOutCode and understand that consumer wants to opt-out of targeted advertising and other privacy-invading AdTech. Similarly, it demonstrates how easy it is for companies who make and/or deploy IoTs that connect to devices with OptOutCode to respect the privacy of those users. 3. It offers companies who want to promote privacy a simple way to integrate the OptOutCode “switch” into their own apps (we also created a banner they can add to their websites to help their web visitors enable Global Privacy Control (a Universal Opt-Out Mechanism for browsers) and OptOutCode to extend their protections beyond to web to apps and IoTs they connect to.

Screenshots

Shielding Tester4 screens
OptOutCode Easy Device Opt4 screens

Verdict

The call

The clearest difference is update cadence: OptOutCode Easy Device Opt at fortnightly against Shielding Tester's every 7 months. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Shielding Tester ships an update every 7 months, OptOutCode Easy Device Opt fortnightly. The most recent releases landed on September 9, 2026 and July 3, 2026 respectively.

Scorecard1 real difference · 9 level
Shielding Tester versus OptOutCode Easy Device Opt: the parameters behind the verdict, then further details
ParameterShielding TesterOptOutCode Easy Device Opt
PriceFreeFree
Rating—4.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 7 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615.0 — better
Further details — not scored
Size13 MB1 MB
Age rating4+4+
DeveloperVelter KZPrivacy4Cars. LLC

In-app purchases

None

Shielding Tester

No in-app purchases

None

OptOutCode Easy Device Opt

No in-app purchases

Questions

Is Shielding Tester free?
Shielding Tester is free to download, with no in-app purchases.
Is OptOutCode Easy Device Opt free?
OptOutCode Easy Device Opt is free to download, with no in-app purchases.
Do Shielding Tester or OptOutCode Easy Device Opt have ads?
Neither Shielding Tester nor OptOutCode Easy Device Opt shows ads.
Which is updated more often, Shielding Tester or OptOutCode Easy Device Opt?
Shielding Tester ships an update every 7 months, and OptOutCode Easy Device Opt fortnightly. Most recently, Shielding Tester was updated on September 9, 2026 and OptOutCode Easy Device Opt on July 3, 2026.

Other comparisons