EMF Detector vs NSguard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EMF Detector
Read full descriptionHide full description
EMF Wave Detector transforms your smartphone into a powerful electromagnetic field detector. Using your device's built-in magnetometer, it measures magnetic fields in real-time with professional-grade accuracy. FEATURES: • Real-time EMF measurement in µT or mG • Visual gauge with color-coded danger levels • Historical graph tracking over time • Sound & vibration alerts when thresholds are exceeded • Dark and light theme support • Works offline - no internet required PREMIUM FEATURES: • Remove all ads • Custom alert thresholds • CSV data export • EMF Heatmap visualization Perfect for: - Home inspections & electrical safety - Paranormal investigations - Electronic device testing - Educational purposes - Curiosity about your electromagnetic environment The app uses only your phone's magnetometer sensor - no additional hardware needed. Accurate, fast, and easy to use. Terms of Use: https://astra-dev.fr/apps/emf-detector/terms-of-use.html Privacy Policy: https://astra-dev.fr/apps/emf-detector/privacy-policy.html
NSguard
Read full descriptionHide full description
NSguard 是 NSNode 室内环境监测设备的配套应用,帮助你集中查看设备上传的环境数据,了解不同空间的当前状态与变化趋势。 集中展示空气质量等级、甲醛、TVOC、eCO₂、温度和湿度数据,清晰了解当前室内环境状态。 查看最近 24 小时、7 天和 30 天的数据变化,并可分别查看不同环境指标。 支持绑定多台 NSNode,为设备设置“客厅”“卧室”或“办公室”等名称,并在不同设备之间快速切换。 首次添加设备时,通过蓝牙确认附近 NSNode 的设备身份。绑定完成后,日常环境数据将通过互联网从云端自动同步,无需保持蓝牙连接。 可以添加、重命名、切换或解除绑定设备,更方便地管理不同空间中的 NSNode。 使用说明: • 使用真实设备功能需要兼容的 NSNode 设备和互联网连接。 • 未连接设备时,可以通过演示模式了解应用的主要界面和功能。 • 蓝牙仅用于首次发现和绑定附近的 NSNode。 • 环境等级和传感器读数仅用于环境监测与趋势参考,不构成医疗诊断、安全认证或专业检测结论。
Screenshots
Verdict
The clearest difference is in-app purchases: NSguard at none against EMF Detector's 3. NSguard also leads on ads (none vs shown). EMF Detector's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 26.0). On price and update cadence 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
Both are free to download. EMF Detector sells 3 in-app purchases, starting at $2.99 per month. NSguard asks for nothing beyond the download.
EMF Detector ships an update every 10 days, NSguard weekly. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.
| Parameter | EMF Detector | NSguard |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 26.0 |
| Further details — not scored | ||
| Size | 56 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Singabe Djonouma | 增阳 赵 |
In-app purchases
EMF Detector
- Monthly Premium$2.991 Month
- Yearly Premium$19.991 Year
- Lifetime Premium$39.99
NSguard
No in-app purchases
Questions
Is EMF Detector free?
Is NSguard free?
Do EMF Detector or NSguard have ads?
Which is updated more often, EMF Detector or NSguard?
Other comparisons















