Comparison

A2DPblocker vs EMF Radiation Detector Reader

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

Head to head
About

A2DPblocker

This app prevents Bluetooth stereo audio from automatically connecting on your iOS device. It allows other Bluetooth functions like calls and GPS audio to work seamlessly with your car kit or headset.

Highlights
  • Blocks A2DP connections
  • Defaults audio output to HFP car kits/headsets
  • Maintains default audio output device
  • Built-in iPod controls
  • Audio Playback Queue support
  • Suppresses audio notification alerts (older iOS)
Features
Read full description

WHAT IS IT? ------------------------------------------// A2DPblocker is an audio player that blocks the Advanced Audio Distribution Profile (A2DP) (i.e. Bluetooth Stereo Profile) from connecting on a Bluetooth enabled iOS device without completely disabling the Bluetooth hardware. This enables the iOS device to continue to perform other Bluetooth functions like default audio output from another audio app (dictation, audio books, podcasts, GPS, music streaming, etc.) to a Hands-Free Profile (HFP) enabled Bluetooth car kit, headset, etc. as well as make phone calls over Bluetooth, and wirelessly control the iPod with a paired AVRCP enabled Bluetooth accessory. A2DP was introduced in iOS 3.0 and this app simply blocks A2DP from connecting and maintains the default audio output device when it's running in the foreground (including when the screen is locked on iOS 3.1 or later devices) or background (requires iOS 4.0 or later). You can finally disable A2DP once and for all with this app and stop manually changing the default audio output device each time your car kit, headset, or whatever A2DP enabled Bluetooth accessory you have connects to your iOS device. FEATURES ------------------------------------------// - blocks A2DP. - defaults audio output from another audio app to a HFP enabled Bluetooth car kit, headset, etc. - maintains the default audio output device. - built-in iPod controls. - audio Playback Queue (requires iOS 4.0 or later). - suppresses audio notification alerts (only on pre-iOS 7.0 or earlier devices). HOW TO USE ------------------------------------------// 1.) Pair your Bluetooth enabled iOS device with your Bluetooth car kit, headset, etc. 2.) Launch A2DPblocker and ensure “A2DP Blocker" switch is ON. 3.) Add a downloaded non-DRM (i.e. not copy-protected) audio track from your music library to the Playback Queue on iOS 4.0 or later and adjust the independent volume slider to guarantee A2DP is blocked. 4.) Ensure “Remote Control" switch is OFF. 5.) Set Default Audio to “speaker+” / “receiver” / “speaker” to block A2DP or “headset+” to default audio output via HFP. 6.) Play Playback Queue. 7.) Launch and configure your other audio app or begin playing the iPod with the built-in iPod controls or an attached accessory. Now your Bluetooth enabled iOS device should block the A2DP connection from occurring or audio should now be streaming via the HFP connection as long as A2DPblocker is active. Successive launches of A2DPblocker doesn't require reconfiguration and it will not interfere with the phone call function or transport controls (AVRCP). NOTICE ------------------------------------------// HFP enabled Bluetooth car kits, headsets, etc. that only support the phone call function may configure A2DPblocker to utilize the same connection to playback audio (see HOW TO USE). However, the audio quality of the HFP standard is designed to be low bitrate, mono, and frequency limited to voice ranges, which is why music streaming may sound a bit lacking, but streaming dictation, audio books, podcasts, GPS, etc. for example would sound normal. REQUIREMENTS ------------------------------------------// - requires iOS 7.0 or later. - Bluetooth. - microphone or other audio input. - works best with the audio Playback Queue active. CONTACT INFO ------------------------------------------// Please contact me with your questions and/or comments. If you just love A2DPblocker then please leave a review! - twitter.com/gnavicks - dkanem.selfip.com

About

EMF Radiation Detector Reader

Detect electromagnetic fields (EMF) around you using your phone's sensors. Identify high-radiation zones in your home and workplace to better organize your environment and potentially improve well-being. Measure EMF emitted by various electronic devices and appliances.

Highlights
  • Detect EMF radiation
  • Measure EMF levels
  • Identify risk zones
  • Organize living space
  • Measure appliance emissions
  • No expensive equipment needed
Features
Read full description

> Detect Invisible Fields: Find the ElectroMagnetic Fields around you in seconds > Pro-Grade Precision: High-accuracy Magnetic Field Analyzer & Gauss Meter with Advanced Signal Stabilization. > Record, Analyze & Export: track trends with interactive data charts and save detailed logs for professional analysis. Check out the areas where you work (desk, meeting rooms), where you sleep (bed), where you relax (couch, living room) and find the levels of EMF you are exposed to. Also use the app to measure the fields emitted by your appliances (computer, fridge, speaker, phone...). PROFESSIONAL MAGNETIC FIELD ANALYZER & GAUSS METER: Discover the invisible magnetic world around you. Using your device’s internal magnetometer, the app provides a comprehensive look at the electromagnetic fields (ELF) generated by electronic devices, wiring, and ferromagnetic materials. NEW PROFESSIONAL FEATURES: - 3-Axis Vector Analysis: Real-time $x, y,$ and $z$ coordinate tracking for precise field directionality. - Interactive History Graphs: Visualize time evolution with high-resolution charts that track spikes and trends. - Clean Signal Mode (LPF): Toggle an advanced Low-Pass Filter to stabilize readings and remove sensor jitter for professional-grade clarity - Save & Export Logs: Record your sessions and export data for further analysis in external software. VERSATILE USE CASES: Electronics Inspection: Measure the magnetic footprint of computers, speakers, and home appliances. Metal Detection: Locate ferromagnetic objects like iron pipes or steel studs behind walls. Interference Calibration: Find the "quietest" zones for sensitive electronic equipment or audio setups. USER EXPECTATIONS & DISCLOSURE: This app is designed as a sophisticated utility for detecting Magnetic Fields (ELF). What it detects: Magnetic flux from magnets, ferrous metals, and the low-frequency electromagnetic fields emitted by electronic components, power supplies, and speakers. What it does NOT detect: This app is not a radio frequency (RF) scanner. It cannot detect Wi-Fi signals, Bluetooth, 5G cellular radiation, or microwave leakage. DISCLAIMER: - This app is intended for educational and utility purposes. It is not a substitute for certified industrial or scientific equipment. It does not provide medical advice or guarantee "safe zones" in a clinical sense. This app does not guarantee exact measures as other fields can interfere with the compass inside your phone, which is used to detect the fields. SUBSCRIPTIONS: - Length: weekly, yearly - Your payment will be charged at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - To Manage or Cancel your subscription, it can be done via the Settings app of your device. For more detail, see https://support.apple.com/en-us/118428 . - To Manage or Cancel your subscription, it can also be done directly from the app: Go to ‘Settings’ screen inside our app, tap on ‘Manage Subscriptions’ and the app will directly open the list of your Subscriptions with the AppStore. You can select a subscription and check available plans or cancel subscription. - When canceling a subscription, your subscription will remain active until the end of the period. Auto-renewal will be disabled but the current subscription will not be refunded. - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Read our Privacy Policy at: https://roundingsquares.com/privacy/ Read our Terms of Use at: https://roundingsquares.com/terms/

Screenshots

A2DPblocker4 screens
EMF Radiation Detector Reader3 screens

Verdict

The call

The clearest difference is price: EMF Radiation Detector Reader at Free against A2DPblocker's $2.99. EMF Radiation Detector Reader also leads on rating (4.5 vs 2.0) and ratings volume (5K vs 11). A2DPblocker's advantage is in-app purchases (none vs 2) and ads (none vs shown). On update cadence 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

EMF Radiation Detector Reader is free to download; A2DPblocker costs $2.99 up front. EMF Radiation Detector Reader sells 2 in-app purchases, starting at $1.99 per 7 days. A2DPblocker asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

EMF Radiation Detector Reader holds the better App Store score, 4.5 against 2.0. That said, the two scores are not equally well evidenced: EMF Radiation Detector Reader has 5K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 39% of A2DPblocker's written reviews are positive against 54% of EMF Radiation Detector Reader's.

UpkeepUpdate frequency

A2DPblocker ships an update every 10 months, EMF Radiation Detector Reader every 6 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

Scorecard8 real differences · 2 level
A2DPblocker versus EMF Radiation Detector Reader: the parameters behind the verdict, then further details
ParameterA2DPblockerEMF Radiation Detector Reader
Price$2.99Free — better
Rating2.0 (11 ratings)4.5 (5K ratings) — better
Positive reviews38.7% of reviews53.5% of reviews — better
Number of ratings115K — better
Update frequencyEvery 10 monthsEvery 6 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS7.0 — better15.6
Further details — not scored
Size2 MB20 MB
Age rating4+4+
DeveloperGnavicksRounding Squares BV

Customer experience

A2DPblocker

All ratings11 ratings
Positive18.2%
Neutral9.1%
Negative72.7%
Written reviews181 reviews
Positive38.7%
Neutral8.8%
Negative52.5%

EMF Radiation Detector Reader

All ratings4,966 ratings
Positive87.5%
Neutral4.7%
Negative7.8%
Written reviews385 reviews
Positive53.5%
Neutral8.6%
Negative37.9%

User reviews

A2DPblocker

From 11 App Store ratings

What we love

  • ✅ Solves Bluetooth audio routing issues for specific car models
  • 🎵 Enables music playback on older Bluetooth devices without A2DP support
  • ⚡ Simple setup process when instructions are followed
  • 👨‍💼 Responsive and helpful developer support
  • 💰 Affordable one-time purchase price

Room to improve

  • 🔴 Does not work in background - app must stay in foreground
  • 🔋 Significant battery drain when app is running
  • 📉 Poor audio quality - mono instead of stereo
  • 📱 Cannot lock phone screen while using app
  • 🚫 Requires manual playlist creation instead of using standard music app

EMF Radiation Detector Reader

From 5K App Store ratings

What we love

  • 👍 Works well around microwave
  • 👍 Consistent results
  • 👍 Useful tool for detecting EMF
  • 👍 Legit EMF detection
  • 👍 Helps find problem areas

Room to improve

  • 🐛 Ads cover reading numbers
  • 🔍 Unclear how to interpret readings
  • ⚠️ Questionable accuracy, only detects magnets
  • 🔍 No explanation of safe/unsafe levels
  • 🐛 Doesn't detect radio frequencies

Bugs and requests

A2DPblocker

Reported bugs

11 issues
  • App stops working when screen is locked
  • Simultaneous playback of multiple songs
  • Audio disconnects when switching apps
  • Intermittent functionality - works then suddenly stops
  • Incompatibility with iOS 5, iOS 8, and newer versions
Show 6 more
  • Cannot clear playback queue
  • HFP function does not work with GPS
  • App crashes on certain iOS versions
  • Bluetooth connection drops when using navigation
  • App fails to launch or open properly
  • Audio quality issues with next/previous track controls

Requested features

10 requests
  • Background operation while using other apps
  • Support for streaming services like Spotify and Pandora
  • Screen lock capability while app is active
  • Integration with standard iOS music player
  • Stereo audio support instead of mono
Show 5 more
  • Reduced battery consumption
  • Better audio quality
  • Automatic playlist management
  • Support for navigation apps without disconnecting
  • iOS 8+ compatibility improvements

EMF Radiation Detector Reader

Reported bugs

2 issues
  • Readings inconsistent or inaccurate
  • Doesn't work as expected, only detects magnets

Requested features

3 requests
  • Add sound or vibration alerts for high EMF
  • Provide more information on EMF levels and safety
  • Improve layout to avoid ads covering readings

In-app purchases

None

A2DPblocker

No in-app purchases

2 purchases

EMF Radiation Detector Reader

Subscriptions2
  • EMF Radiation Detector Premium Week3 Days trial$1.997 Days
  • EMF Radiation Detector Premium Year$9.991 Year

Questions

Is A2DPblocker free?
A2DPblocker costs $2.99, with no in-app purchases.
Is EMF Radiation Detector Reader free?
EMF Radiation Detector Reader is free to download, with in-app purchases available.
Which has better reviews, A2DPblocker or EMF Radiation Detector Reader?
EMF Radiation Detector Reader is rated higher. A2DPblocker averages 2.0 out of 5 from 11 ratings, while EMF Radiation Detector Reader averages 4.5 from 5K ratings.
Do A2DPblocker or EMF Radiation Detector Reader have ads?
EMF Radiation Detector Reader shows ads; A2DPblocker does not.
Which is updated more often, A2DPblocker or EMF Radiation Detector Reader?
A2DPblocker ships an update every 10 months, and EMF Radiation Detector Reader every 6 months. Most recently, A2DPblocker was updated on October 29, 2026 and EMF Radiation Detector Reader on October 27, 2026.

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