D vs Thermal Master
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
D
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D-Vision is the companion software for electronic sighting devices produced by DiscoveryOpt, which can help you manage your devices. The specific features are as follows: 1. Device Connection 2. Real-time Device Video Streaming 3. Device-side Control 4. Access and Download of the Database 5. Firmware Update
Thermal Master
This utility app connects to specific thermal camera models, offering enhanced thermal imaging capabilities. It features an upgraded algorithm for clearer heat source detection and supports digital zoom for precise target identification. The app provides lifetime free software upgrades.
- Connects to P, X, DV, and T2Max series thermal cameras
- Upgraded Insight+ algorithm for noise suppression
- Enhanced heat source visibility
- Up to 15x digital zoom
- Lifetime free software upgrades
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This App compatible to Thermal Master P series, X series, DV series and T2Max models. Thermal Master offers two main product lines with a total of 19 models: the traditional smartphone thermal cameras and the thermal monoculars. These products cover a wide range of applications—from home temperature monitoring and industrial inspections to 1500-meter long-range outdoor night vision. What's new in this version: The Insight+ algorithm has been fully upgraded to intelligently suppress false targets, highlight true thermal sources, and reduce background noise. Heat sources now appear larger and brighter for better visibility. All Thermal Master models support up to 15x digital zoom, enabling fast and accurate target localization. As a global leader in smartphone thermal imaging, Thermal Master is committed to developing sharper, smarter thermal camera innovations. We hold the largest portfolio of mobile thermal imaging patents and provide lifetime free software upgrades for all our products.
Screenshots
Verdict
The clearest difference is update cadence: Thermal Master at every 3 weeks against D's every 6 weeks. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
D ships an update every 6 weeks, Thermal Master every 3 weeks. The most recent releases landed on August 22, 2026 and September 9, 2026 respectively.
| Parameter | D | Thermal Master |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.3 (14 ratings) — better |
| Positive reviews | — | 36.4% of reviews |
| Number of ratings | — | 14 — better |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 47 MB | 126 MB |
| Age rating | 17+ | 17+ |
| Developer | Shenzhen DiscoveryOpt Technology Co., Ltd. | Thermal Master Technology Co.,Ltd. |
In-app purchases
D
No in-app purchases
Thermal Master
No in-app purchases









