Comparison

Magnetic Storms vs On

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

Head to head
About

Magnetic Storms

Monitor Earth's magnetic field and solar activity in near real-time. Track Kp and A indices, solar wind speed, solar flares, and proton/electron flux. Predict auroras and magnetic storms.

Highlights
  • Real-time magnetic field monitoring
  • Solar activity tracking
  • Kp and A Index data
  • Solar wind speed
  • Solar flare detection
  • Proton and electron flux
  • Aurora prediction
Read full description

The Magnetic Storms application was originally developed to allow monitoring of the Earth's magnetic field in near real time, using data from GOES satellites that constantly monitor solar activity and a set of magnetic stations distributed around the Earth. With the improvement of the application due to the huge number of users and the availability of new parameters related to the Sun and Space Weather by the space agencies, lots of other information was added and they are shown in a simple and intuitive way. The main parameters presented are the Kp Index, the A Index, the instantaneous speed of the solar wind, the number of class C, M and X solar flares observed in X-rays, in addition to the flux of protons and electrons, flux of X-rays and magnetic field measurements observed by GOES-16. With an analysis of this information it is possible to anticipate sudden changes in the Earth's magnetic field at ground level and the occurrence of aurora with some advance. An ideal application for anyone who wants to monitor solar activity and its implications on Earth, such as problems in the transmission of radio and TV waves, blackouts in electricity transformer stations, auroras, magnetic storms. It is the perfect app for anyone interested in Space Weather in general, and is available in English, Portuguese, Spanish, Italian and French. As a way of keeping the app distributed for free and constantly updated, we kindly ask you to rate the app ("stars") and write a brief description of why you use it and (we hope you) enjoy it. Criticism and suggestions are always welcome at mikebm10.appledeveloper@gmail.com. NOTE: the parameters shown in the application are obtained from the research entities responsible for their collection and processing, and depend on the availability and access to the electronic servers of these entities. Any connection speed problems with the servers or temporary unavailability of information by those institutions can affect the functioning of the application, and are beyond the control of the developers. Problems should be reported by email mikebm10.appledeveloper@gmail.com, with a description of the observed effects. Please do not assign a low rating in the evaluation of the application for possible failures in the servers, which are not our responsibility. An email message will be promptly answered and possible measures will be taken. We thank you for your understanding.

About

On

This tool assists amateur radio operators with managing on-air nets and check-ins. It offers real-time messaging, email integration, and detailed operator information retrieval. The app supports multiple simultaneous sessions and configurable displays for efficient communication and tracking.

Highlights
  • Real-time net check-in tracking
  • Instant messaging (AIM) sessions
  • Integrated email client
  • Configurable information displays
  • QRZ/QRZCQ call sign lookup
  • WebSDR audio streaming
  • QRZ Logbook integration
Read full description

On-Air Net Scraper "Personal" Pro is an iPhone/iPad/MacOS silicon App providing a wide range of features for Amateur Radio operators (Hams). Key features include NetLogger Amateur Radio On-Air Nets, Check-Ins and multiple Almost Instant Message (AIM) sessions in real-time data awareness. AIM pass key automatic email request with single button click resulting in immediate pass key information reply. Full integrated Email client for yet another method for Hams to carry out conversations. Multiple tabbed displays allowing user to track unlimited number of On-Air Net Check-Ins at one time. User configurable information displays to included viewing detailed Ham information within Check-In views. Near real-time AIM client text message send and receive. Searching and viewing Past NetLogger Nets and Check-Ins. Monitor mode so users can be aware of NetLogger Check-In "lurkers". Simultaneous QRZ and QRZCQ login is supported facilitating Call Sign lookup and Ham information retrieval. Easy, click to display NetLogger Nets, Check-Ins Call Sign and operator status information, not requiring QRZ/CQ accounts. Multi-screen displays to included improved 2-way and 3-way split screens provide simultaneous displays of Check-Ins, AIM, AIM and Net Scraper Message Exchange current listing data along with WebSDR viewing and listening. PERSISTENT WebSDR radio LIVE audio listenings while simultaneously viewing multiple Net Check-In views. Seamlessly integrates with On-Air Net Scraper Desktop Server WebSocket Interface supporting private Internet chat sessions between On-Air Net Scraper ME clients. JS8Call/WSJTX full participation in digital radio REAL-TIME texting when using NetBird VPN or when paired with On-Air Net Scraper's Message Exchange (ME) Server. Autoload favorite NetLogger nets. Callsign search both NetLogger Active and Past net listing, including improved automatic continuous search and displaying of matched nets. QRZ Logbook insert/update/delete. Supports On-Device authentication and Two-Factor authentication in addition to encrypted secure storage of sensitive data and app access security. JS8Call dynamic frequency adjustment.

Screenshots

Magnetic Storms4 screens
On4 screens

Verdict

The call

The clearest difference is ads: On at none against Magnetic Storms's shown. On also leads on update cadence (monthly vs every 12 months) and monetization model (free vs free with in-app purchases). Magnetic Storms's advantage is review sentiment (82% vs 50%) and iOS requirement (12.4 vs 15.6). On price, rating, ratings volume 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.3 for Magnetic Storms against 4.4 for On. Both are backed by a comparable volume of ratings — 19 and 13 respectively. Written reviews are what separate them: 82% of Magnetic Storms's written reviews are positive against 50% of On's.

UpkeepUpdate frequency

Magnetic Storms ships an update every 12 months, On monthly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
Magnetic Storms versus On: the parameters behind the verdict, then further details
ParameterMagnetic StormsOn
PriceFreeFree
Rating4.3 (19 ratings)4.4 (13 ratings) — better
Positive reviews81.5% of reviews — better50.0% of reviews
Number of ratings19 — better13
Update frequencyEvery 12 monthsMonthly — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS12.4 — better15.6
Further details — not scored
Size37 MB30 MB
Age rating4+17+
DeveloperAndre MolinaChristopher Robson

Customer experience

Magnetic Storms

All ratings19 ratings
Positive84.2%
Neutral5.3%
Negative10.5%
Written reviews92 reviews
Positive81.5%
Neutral5.4%
Negative13.0%

On

All ratings13 ratings
Positive84.6%
Neutral7.7%
Negative7.7%
Written reviews8 reviews
Positive50.0%
Neutral12.5%
Negative37.5%

Bugs and requests

Magnetic Storms

Reported bugs

9 issues
  • App quits updating
  • Chart not updated
  • Crashes on startup
  • App crashes immediately
  • App crashes on first run
Show 4 more
  • App not working after updates
  • Splash screen issue
  • App not starting
  • App offline for a week

Requested features

6 requests
  • Paid version without ads
  • Local weather based on location
  • Email or notification alerts for major magnetic storms
  • Long-term/historical data
  • Dark mode option
Show 1 more
  • More elegant graphs

On

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Magnetic Storms

No in-app purchases

None

On

No in-app purchases

Questions

Is Magnetic Storms free?
Magnetic Storms is free to download, with no in-app purchases.
Is On free?
On is free to download, with no in-app purchases.
Which has better reviews, Magnetic Storms or On?
On is rated higher. Magnetic Storms averages 4.3 out of 5 from 19 ratings, while On averages 4.4 from 13 ratings.
Do Magnetic Storms or On have ads?
Magnetic Storms shows ads; On does not.
Which is updated more often, Magnetic Storms or On?
Magnetic Storms ships an update every 12 months, and On monthly. Most recently, Magnetic Storms was updated on November 1, 2026 and On on November 3, 2026.

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