GV vs Otrol
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GV
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GV-Face allows you to take portrait photos, create new face data, search for recognition events and view live recognition events of GV-VD8700 / GV-FD8700 and GV-AI FR and GV-FR Panel through your mobile phone.
Otrol
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Otrol allows you to monitor multiple sensor data in real time and automatically control relays. Receive alert message through APP and keeps you up to speed with the latest situation. Provide factory monitoring system, water tower monitoring, water quality detection, electrical gate detection and other solutions ● Wireless transmission: No longer through wired transmission, convenient and safe ● Exception warning: Real-time notification of abnormal occurrence to reduce risks ● Sensing equipment: It can access the user's existing sensor items to save equipment cost ● Intelligent control: Remote control, or automatic control according to the monitoring value ● Cloud platform: Data digitizing for saving data no longer missing Application scenarios such as water quality monitoring, water level detection tower, automatic start pump, factory wastewater discharge, gate induction, etc
Screenshots
Verdict
The clearest difference is update cadence: Otrol at monthly against GV's every 6 months. GV's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.6). On price, ads and in-app purchases 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.
GV ships an update every 6 months, Otrol monthly. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.
| Parameter | GV | Otrol |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 37 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | GeoVision inc | DoubleVision Technology Co., Ltd. |
In-app purchases
GV
No in-app purchases
Otrol
No in-app purchases
