EMwaveRT vs STEMulator
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
EMwaveRT
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EMwaveRT is an app to aid teaching and learning of electromagnetics (EM) using mobile devices on the topic of plane wave reflection (R) and transmission (T). The app is designed to provide effective touch-based interactivity and visualization to help students better understand EM concepts. It is applicable to EM plane wave reflection and transmission for general oblique incidence and polarization. The instructor is able to input or change various parameters and rotate the view angles for interactive teaching. Based on the parameters, the 3D animations of incident, reflected and transmitted waves can be visualized in real time. This allows the students to identify clearly each wave and improves their learning of plane wave reflection and transmission. Through several preset cases of incident angles, the visualizations on mobile devices are illustrated. The app can be used to supplement the 3D TV program available for download from http://www.ntu.edu.sg/home/eeltan/TEL3DTV.html. User interface: - 3D view may be zoomed or rotated - text view may be zoomed or scrolled - double tap to revert to default view - touch on any underlined field to input/change value - use long slider to change the last field touched - use short slider to change the text transparency - use '|' to show/hide tangential components at interface
STEMulator
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Calling all teenagers and younger. A virtual world full of informative animations on all things STEM (Science, Technology, Engineering & Mathematics), from pumping human hearts to power station turbines, microbes to mountains, farming to factories. How does it work? How is it made? What career and subject choices? Our simple visual navigation system allows you to explore the world at leisure. Get behind the scenes. Still in its infancy, we're hungry for additional content. Think Wikipedia. No in-app purchases required. Weβre sharing our knowledge. The STEMulator is for sharing.
Screenshots
Verdict
The clearest difference is iOS requirement: EMwaveRT at 11.0 against STEMulator's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
EMwaveRT ships an update every 5 months, STEMulator every 9 months. The most recent releases landed on May 16, 2026 and May 19, 2026 respectively.
| Parameter | EMwaveRT | STEMulator |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 months β better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 β better | 15.1 |
| Further details β not scored | ||
| Size | 1 MB | 35 MB |
| Age rating | 4+ | 17+ |
| Developer | Eng Tan | STEMulator |
In-app purchases
EMwaveRT
No in-app purchases
STEMulator
No in-app purchases
Questions
Is EMwaveRT free?
Is STEMulator free?
Do EMwaveRT or STEMulator have ads?
Which is updated more often, EMwaveRT or STEMulator?
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