Emergency Alarm vs HeatSight
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Emergency Alarm
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Emergency Alarm allows you to use your Apple Watch to play loud alarm sounds from your wrist in situations of need. Tap the emergency button and a loud alarm sound will be played, being useful for rescue situations where you don't have an Internet connection to send S.O.S message or emergency call.
HeatSight
Visualize thermal data in real-time with multiple color palettes and precise temperature readings. Features include hot/cold spot tracking, anomaly detection, and GPU-accelerated upscaling. Save, analyze, and export thermal data for various applications.
- Real-time thermal imaging via WiFi
- Multiple color palettes
- Exact temperature readings
- Hot/cold spot auto-tracking
- Anomaly detection
- GPU-accelerated upscaling
- Radiometric snapshots
- CSV data export
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FEATURES • Real-time thermal imaging via WiFi (UDP/TCP) • 5 color palettes: Ironbow, Rainbow, White Hot, Black Hot, Lava • Touch anywhere to read exact temperature • Hot/cold spot auto-tracking • Anomaly detection highlights unusual temperatures • GPU-accelerated upscaling (1x–8x) with edge-aware sharpening • Frame averaging for noise reduction • Radiometric snapshots — save and re-analyze thermal data • CSV export for data analysis • Recording and playback • Celsius/Fahrenheit with emissivity presets • Temperature reference guide for home inspection, electrical, HVAC • Battery level monitoring • Works without hardware in Demo Mode REQUIREMENTS • Waveshare ESP32-S3 Thermal Camera Module • Custom firmware (open source, included on GitHub) • WiFi connection to the ESP32 module
Screenshots
Verdict
The clearest difference is price: HeatSight at Free against Emergency Alarm's $0.99. Emergency Alarm's advantage is iOS requirement (15.6 vs 26.1). On ads, in-app purchases 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
HeatSight is free to download; Emergency Alarm costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Emergency Alarm | HeatSight |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 1.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 67 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 26.1 |
| Further details — not scored | ||
| Size | 2 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Arthur Eduardo Skaetta Alvarez Desenvolvimento de Software LTDA. | Taylor Galbraith |
In-app purchases
Emergency Alarm
No in-app purchases
HeatSight
No in-app purchases
Questions
Is Emergency Alarm free?
Is HeatSight free?
Do Emergency Alarm or HeatSight have ads?
Other comparisons
