Comparison

D vs Thermal Master

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

Head to head
About

D

Features
Read full description

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

About

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.

Highlights
  • 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
Read full description

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

D3 screens
Thermal Master4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level
D versus Thermal Master: the parameters behind the verdict, then further details
ParameterDThermal Master
PriceFreeFree
Rating—2.3 (14 ratings) — better
Positive reviews—36.4% of reviews
Number of ratings—14 — better
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size47 MB126 MB
Age rating17+17+
DeveloperShenzhen DiscoveryOpt Technology Co., Ltd.Thermal Master Technology Co.,Ltd.

In-app purchases

None

D

No in-app purchases

None

Thermal Master

No in-app purchases

Questions

Is D free?
D is free to download, with no in-app purchases.
Is Thermal Master free?
Thermal Master is free to download, with no in-app purchases.
Do D or Thermal Master have ads?
Neither D nor Thermal Master shows ads.
Which is updated more often, D or Thermal Master?
D ships an update every 6 weeks, and Thermal Master every 3 weeks. Most recently, D was updated on August 22, 2026 and Thermal Master on September 9, 2026.

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