D vs NV 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
NV Master
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NV Master is a mobile application tool that is compatible with thremal AI collision prevention instruments and used in many scenarios, such as safe driving, nighttime pedestrian monitoring, and vehicle detection. It is convenient for users to manage related AI collision prevention instruments by wirelessly connecting with the device and achieving device control and remote OTA upgrade.
Screenshots
Verdict
D and NV Master are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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, NV Master every 3 weeks. The most recent releases landed on October 5, 2026 and September 12, 2026 respectively.
| Parameter | D | NV Master |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 47 MB | 46 MB |
| Age rating | 17+ | 17+ |
| Developer | Shenzhen DiscoveryOpt Technology Co., Ltd. | Thermal Master Technology Co.,Ltd. |
In-app purchases
D
No in-app purchases
NV Master
No in-app purchases
