Comparison

EMF Radiation Detector Reader vs KeptHere

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

Head to head
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/

About

KeptHere

Read full description

KeptHere helps you remember exactly where you stored your belongings. Organize everything using a simple structure: Locations, Areas, Boxes and Items. Add photos, descriptions and QR labels, then find anything quickly whenever you need it. With KeptHere you can: • Organize belongings by location, area and box • Search for stored items instantly • Add photos and descriptions • Generate permanent QR codes for your boxes • Scan a QR code to see what is inside • Create and print box labels • Back up and restore your data • Choose from multiple visual themes • Use the app in English, Portuguese, French, Spanish and German Your data stays on your device. No account is required. KeptHere Free lets you organize 1 location, 2 areas, 6 boxes and 30 items. Need more? KeptHere Unlimited removes those limits with a one-time purchase. No ads. No subscription. Store it. Remember it. Find it.

Screenshots

EMF Radiation Detector Reader3 screens
KeptHere4 screens

Verdict

The call

The clearest difference is ads: KeptHere at none against EMF Radiation Detector Reader's shown. KeptHere also leads on update cadence (every 9 days vs every 7 months) and iOS requirement (13.0 vs 15.6). On price, 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. EMF Radiation Detector Reader sells 2 in-app purchases, starting at $1.99 per 7 days and KeptHere sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

EMF Radiation Detector Reader ships an update every 7 months, KeptHere every 9 days. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
EMF Radiation Detector Reader versus KeptHere: the parameters behind the verdict, then further details
ParameterEMF Radiation Detector ReaderKeptHere
PriceFreeFree
Rating4.5 (4.7K ratings) — better—
Positive reviews52.8% of reviews—
Number of ratings4.7K — better—
Update frequencyEvery 7 monthsEvery 9 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size20 MB26 MB
Age rating4+4+
DeveloperRounding Squares BVRodrigo Fernandes

Bugs and requests

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

KeptHere

Not enough reviews yet to summarise bugs or requests.

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
1 purchases

KeptHere

One-time1
  • KeptHere Unlimited$4.99

Questions

Is EMF Radiation Detector Reader free?
EMF Radiation Detector Reader is free to download, with in-app purchases available.
Is KeptHere free?
KeptHere is free to download, with in-app purchases available.
Do EMF Radiation Detector Reader or KeptHere have ads?
EMF Radiation Detector Reader shows ads; KeptHere does not.
Which is updated more often, EMF Radiation Detector Reader or KeptHere?
EMF Radiation Detector Reader ships an update every 7 months, and KeptHere every 9 days. Most recently, EMF Radiation Detector Reader was updated on October 14, 2026 and KeptHere on September 30, 2026.

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