EMF Detector for iOS — Privacy Policy
Updated on September 29, 2026
Updated on September 29, 2026
EMF Detector reads your device's built-in magnetometer and motion sensors to show magnetic field strength, a compass radar, a metal finder and a movement meter, and lets you record sessions of magnetometer readings. It also has a camera tool that marks human-shaped figures in the live camera view. All sensor readings and camera images are processed on your device.
The app is for entertainment purposes only. It is not a scientific instrument. A reading shows the magnetic field at your device and nothing more.
The app has no accounts and no sign-in. It does not collect your name, email address, contacts or precise location. It never reads your photo library. It does not access your microphone. It does not send your sensor readings, your recorded sessions or camera images to us or to anyone else.
Sessions you record (magnetic field readings and the times at which they were taken) are stored only on your device. They leave your device only if you choose to export a session, in which case the file goes wherever you send it.
Your settings are stored on your device. These include the measurement unit, sound, vibration, sensitivity, radar skin, and your "Share usage data" choice.
You can delete any recorded session inside the app. Deleting the app removes all of this data.
The camera tool processes images on your device only. Nothing is stored or transmitted unless you choose to share or save a photo.
The app asks for camera access only when you first open the camera tool, and every other feature works without it. Human-shape detection uses Apple's Vision framework on your device. No image, depth or detection data is sent to us, to analytics or to advertisers.
If you capture a photo, the app offers it through the iOS share sheet. If you tap Save Image there, iOS asks you for add-only access to Photos, which allows that image to be added to your library and nothing else. The app never reads your photo library.
With your permission, EMF Detector uses Google Analytics for Firebase, a service provided by Google, to understand how the app is used and to measure our advertising campaigns.
When "Share usage data" is on, Google Analytics collects:
If you have allowed tracking in iOS, it may also collect your device's advertising identifier. The app never sends magnetometer readings or anything you record.
Where a consent law applies to you (for example in the EEA, the UK and Switzerland), the app does not allow advertising storage or the use of your data for advertising. Everywhere else, the app gives Google Analytics consent for advertising storage and the advertising use of your data only if you have allowed tracking in iOS. Google's on-device conversion measurement is described below. Google Analytics data is not used to personalise ads for anyone.
Nothing is collected until you choose on the last onboarding page. There, "Share usage data" starts on, or off where a consent law applies to you, and you can change it before you continue. If you updated from version 1.0, it stays off unless you turn it on in Settings. You can turn it off at any time in Settings → Share usage data, which stops collection. Turning it off does not affect any feature or purchase.
Google Analytics keeps the data linked to these identifiers for the retention period set on our Google Analytics property, which is at most 14 months, and then deletes it automatically on a monthly basis. Aggregated reports, which do not identify you, are not affected by that setting. To ask for deletion, contact us at support@ashaquavision.com.
We use Firebase Remote Config for configuration only. It lets us adjust settings such as how often ads may appear and when the upgrade offer is shown, without an app update.
Each request identifies this installation with a Firebase installation ID. It includes your device's country, language, time zone and OS version, plus the app's identifiers, which Google uses to choose the settings for your device.
We measure our Google Ads app campaigns with Google Analytics for Firebase. It includes Google's on-device conversion measurement, which uses de-identified, temporary app event data, such as data derived from device signals like IP addresses and timestamps.
It does not use your email address, phone number or anything you type into the app. Google states that it works without user-identifying information leaving your device. It is inactive for users located in the European Economic Area, the United Kingdom and Switzerland.
The free version of the app shows advertisements served by Google AdMob:
No advertisements appear on their own in Record Mode or while recording. Pro, by subscription or one-time purchase, removes all advertisements.
To serve and measure these advertisements, Google may collect:
Google may use this data for advertising and analytics, including to link it with data from other companies' apps for personalised advertising. This is described in Google's privacy policy.
When you first open the app, iOS may ask whether you allow the app to track you across other companies' apps and websites. If you allow it, your device's advertising identifier may be shared with Google to personalise advertisements. If you decline, advertisements are still shown, but are not personalised using that identifier. You can change this at any time in iOS Settings under Privacy & Security, then Tracking.
In regions where consent is required, the app shows a consent form before serving personalised advertisements. You can change your choice at any time from the Privacy Options entry in the app's Settings.
The app offers EMF Detector Pro as auto-renewing weekly and monthly subscriptions and as a one-time lifetime purchase. The app is fully usable without a purchase.
Payment is processed entirely by Apple through the App Store. We never see your payment details. You manage or cancel subscriptions in your Apple Account settings.
We use RevenueCat, a subscription-management service, to check which purchases and subscriptions you have, so Pro can be unlocked and restored on other devices signed in to the same Apple Account. RevenueCat receives your purchase and subscription history from Apple, linked to a random app user ID that RevenueCat creates for this installation. It does not receive your name, email address or payment details.
While "Share usage data" is on:
When you turn "Share usage data" off, the app removes the Google Analytics identifier from RevenueCat, and it no longer allows the attribution token to be collected from the next time the app starts.
Apart from Google Analytics for Firebase, described above, we do not use any analytics or crash-reporting service of our own. The Google AdMob SDK may collect crash, performance and other diagnostic data, as described under Advertising. Separately, if you have chosen to share analytics with app developers in your iOS settings, Apple may share anonymised crash reports with us; that is controlled by Apple and by your device settings.
The app reads the magnetometer, and reads device motion to obtain a calibrated magnetic field reading, the compass direction used by the radar, and the movement shown by the Presence Meter. Sensor data is used only to display readings and to record sessions you start. It is never transmitted off your device and is never sent to analytics.
The third parties that receive data from the app are Google (AdMob, Google Analytics for Firebase, Firebase Remote Config, Google Ads) and RevenueCat, each as described above. Each of them gives that data the same or an equal level of privacy and security as this policy describes.
The app is not directed at children under 13, and we do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal information, contact us and we will delete it.
We run no servers of our own that store app data. Removing the app from your device removes everything it has stored.
The app has no accounts, so the data held by Google Analytics and RevenueCat is linked only to random identifiers created for this installation, not to your name or email address. We usually cannot find it from a request alone. Turning "Share usage data" off stops Google Analytics collection, and Google deletes the data already collected after the retention period above. For any deletion request, contact us at support@ashaquavision.com, and we will do what we can with the information you give us.
If you have contacted us by email and want that correspondence deleted, write to us and we will remove it.
Use of this app is governed by Apple's Standard End User License Agreement, available at apple.com/legal/internet-services/itunes/dev/stdeula/.
We may update this policy from time to time. The date shown at the top of this page indicates when it was last changed.
If you have questions about this privacy policy, contact us at support@ashaquavision.com. For help with the app, see the EMF Detector for iOS support page.