Comparison

EMF Detector vs MathAlarm

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

Head to head
About

EMF Detector

Transform your iPhone into an EMF detector to monitor electromagnetic fields. Identify radiation levels in various environments to assess safety at home, work, or in public spaces. Gain insights to make informed decisions about your surroundings.

Highlights
  • EMF monitoring
  • Electromagnetic field detection
  • Radiation level measurement
  • Environmental safety assessment
  • Real-time EMF readings
Features
Read full description

Monitor your surroundings with precision using our EMF Monitoring app, designed exclusively for iOS. This innovative application transforms your iPhone into a powerful EMF detector, enabling you to identify electromagnetic fields in various environments. As you move through different areas, the app continuously measures EMF levels, allowing you to easily pinpoint zones of high and low radiation. Whether you're concerned about safety at home, in the workplace, or in public areas, EMF Monitoring provides the insights you need to assess environmental safety and make informed decisions about your surroundings. This app is using the standard Apple Terms of Use (EULA) https://www.apple.com/legal/ internet-services/itunes/dev/stdeula/

About

MathAlarm

This alarm app requires users to solve math problems to turn it off, ensuring they are fully awake. It offers customizable settings for repeat schedules, difficulty levels, and alert types, all managed directly on your wrist.

Highlights
  • Solve math problems to stop alarm
  • Customizable repeat schedules
  • Four difficulty levels
  • Haptic or Sound + Vibrate alerts
  • Multiple independent alarms
  • Runs entirely on Apple Watch
  • No iPhone required
Features
Read full description

Wake up. Actually wake up. MathAlarm is an Apple Watch alarm that won't let you drift back to sleep. To dismiss the alarm, you have to correctly solve a math problem — no more silencing it half-asleep and rolling over. Set alarms with: • Repeat schedules — once, or any combination of weekdays • Four difficulty levels — Easy, Medium, Hard, and Expert • Haptic Only or Sound + Vibrate alerts • Multiple independent alarms, each configured separately When the alarm fires, you're shown a math problem with four multiple-choice answers. Get it right and the alarm stops. Get it wrong and a fresh problem appears — you have to actually think before you can go back to sleep. MathAlarm runs entirely on your wrist. No iPhone required nearby, no account, no subscription. Add a MathAlarm complication to your watch face for a quick glance at your next alarm. No ads. No tracking. No subscriptions — just an alarm that makes sure you're really awake.

Screenshots

EMF Detector3 screens

Verdict

The call

The clearest difference is review sentiment: MathAlarm at 100% against EMF Detector's 25%. MathAlarm also leads on rating (5.0 vs 4.4) and in-app purchases (none vs 3). EMF Detector's advantage is price (Free vs $0.99) and ratings volume (339 vs 2). On update cadence, ads 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 Detector is free to download; MathAlarm costs $0.99 up front. EMF Detector sells 2 in-app purchases, starting at $4.99 per month. MathAlarm asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

MathAlarm holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: EMF Detector has 339 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 25% of EMF Detector's written reviews are positive against 100% of MathAlarm's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard7 real differences · 3 level
EMF Detector versus MathAlarm: the parameters behind the verdict, then further details
ParameterEMF DetectorMathAlarm
PriceFree — better$0.99
Rating4.4 (339 ratings)5.0 (2 ratings) — better
Positive reviews25.0% of reviews100.0% of reviews — better
Number of ratings339 — better2
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPod, Apple Watch
Requires iOS13.0 — better15.0
Further details — not scored
Size11 MB2 MB
Age rating4+4+
Developer新雨 李Discipline Labs LLC

Customer experience

EMF Detector

All ratings319 ratings
Positive83.4%
Neutral4.1%
Negative12.5%
Written reviews16 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

MathAlarm

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

EMF Detector

Subscriptions1
  • unlimited features2 variants$4.991 Month
One-time1
  • unlimited features$14.99
None

MathAlarm

No in-app purchases

Questions

Is EMF Detector free?
EMF Detector is free to download, with in-app purchases available.
Is MathAlarm free?
MathAlarm costs $0.99, with no in-app purchases.
Which has better reviews, EMF Detector or MathAlarm?
MathAlarm is rated higher. EMF Detector averages 4.4 out of 5 from 339 ratings, while MathAlarm averages 5.0 from 2 ratings.
Do EMF Detector or MathAlarm have ads?
Neither EMF Detector nor MathAlarm shows ads.
Which is updated more often, EMF Detector or MathAlarm?
EMF Detector ships an update every 2 weeks, and MathAlarm every 2 weeks. Most recently, EMF Detector was updated on October 24, 2026 and MathAlarm on October 25, 2026.

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