Comparison

EMF Meter vs CastNow Screen Share for IOS

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

Head to head
About

EMF Meter

Monitor electromagnetic field levels and Bluetooth exposure with real-time readings and safety zone indicators. Understand signal strength and exposure levels around you for awareness at home, work, or while traveling.

Highlights
  • Real-time EMF readings
  • Bluetooth device scanning
  • Signal strength in dBm
  • Safety zone indicators
  • Visual EMF analytics
  • Dark and light themes
Features
Read full description

EMF Meter helps you monitor electromagnetic field levels and Bluetooth exposure from one simple dashboard. Use your iPhone’s magnetometer to track EMF changes in real time, then scan nearby Bluetooth devices to understand signal strength and exposure levels around you. Track your environment at home, work, or while traveling with clear meters, safety zones, and simple exposure insights. Key Features: Real-Time EMF Meter Live electromagnetic field readings in microteslas (μT) Uses your device magnetometer Auto-calibration for local magnetic baseline Total EMF safety meter with clear status levels Bluetooth EMF Exposure Scan nearby Bluetooth devices View Bluetooth signal strength in dBm See Bluetooth exposure percentage Safety levels: SAFE, CAUTION, UNSAFE Detailed nearby device list Safety Levels SAFE: Low exposure CAUTION: Noticeable exposure UNSAFE: Strong exposure DANGER: Very high EMF levels for magnetic field readings Visual EMF Analytics Glowing animated safety background Radial meter with color-coded zones Lowest, average, and highest session readings Simple exposure tables Clean dark and light themes Perfect For: Monitoring EMF levels at home Checking workspaces and desks Comparing rooms and nearby electronics Reviewing nearby Bluetooth signal exposure Health-conscious users who want simple EMF awareness How It Works: EMF Meter uses your iPhone’s built-in magnetometer to measure electromagnetic field variation around your device. For Bluetooth, the app scans nearby wireless sources and estimates exposure from signal strength. Privacy: All readings are processed on your device. No ads, no subscriptions, and no unnecessary tracking. Note: Phone sensors are useful for awareness and comparison, but they are not a replacement for certified scientific or medical equipment. For professional safety testing, use calibrated instruments and consult qualified experts.

About

CastNow Screen Share for IOS

Stream your iOS screen, camera, and microphone in real-time to any web browser. Enjoy crystal-clear two-way voice intercom with end-to-end encrypted P2P transmission. No account or app installation needed for viewers.

Highlights
  • Real-time screen streaming
  • Camera and microphone streaming
  • Two-way voice intercom
  • End-to-end encrypted P2P
  • No app installation for viewers
  • No account required
Features
Read full description

CastNow for IOS is a lifetime-purchase P2P screen sharing tool designed for iOS—pay once, use forever with no subscriptions or in-app purchases. Powered by system-level ReplayKit technology, CastNow lets you stream your iOS screen, camera, and microphone in real time directly to any web browser, complete with crystal-clear two-way voice intercom. At its technical core, CastNow uses end-to-end encrypted WebRTC P2P direct transmission. Your data never touches or stays on third-party servers. With no account system required, your privacy is fully protected. Receivers don’t need to install apps, register, or log in—simply open the web link in any desktop or mobile browser and enter the pairing code to start watching seamlessly.

Screenshots

EMF Meter2 screens
CastNow Screen Share for IOS4 screens

Verdict

The call

The clearest difference is update cadence: CastNow Screen Share for IOS at every 9 days against EMF Meter's every 2 months. EMF Meter's advantage is iOS requirement (13.0 vs 15.6). On price, review sentiment, ads and in-app purchases 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 Meter costs $0.99 and CastNow Screen Share for IOS $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

EMF Meter ships an update every 2 months, CastNow Screen Share for IOS every 9 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
EMF Meter versus CastNow Screen Share for IOS: the parameters behind the verdict, then further details
ParameterEMF MeterCastNow Screen Share for IOS
Price$0.99$0.99
Rating—4.0 (1 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size58 MB16 MB
Age rating4+12+
DeveloperPPLST Tech新宇 刘

Customer experience

EMF Meter

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

CastNow Screen Share for IOS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EMF Meter

No in-app purchases

None

CastNow Screen Share for IOS

No in-app purchases

Questions

Is EMF Meter free?
EMF Meter costs $0.99, with no in-app purchases.
Is CastNow Screen Share for IOS free?
CastNow Screen Share for IOS costs $0.99, with no in-app purchases.
Do EMF Meter or CastNow Screen Share for IOS have ads?
Neither EMF Meter nor CastNow Screen Share for IOS shows ads.
Which is updated more often, EMF Meter or CastNow Screen Share for IOS?
EMF Meter ships an update every 2 months, and CastNow Screen Share for IOS every 9 days. Most recently, EMF Meter was updated on October 30, 2026 and CastNow Screen Share for IOS on October 31, 2026.

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