Otrol vs edgLink
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
edgLink
Easily connect your EDG IoT devices to Wi-Fi or cellular networks using your phone's Bluetooth. Once online, your device can send sensor data and receive commands remotely via the cloud.
- Wi-Fi network configuration
- Cellular connectivity enablement
- Bluetooth device pairing
- Remote data transmission
- Command reception from cloud
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The edgLink mobile app allows you to connect your EDG IoT devices to an active Wi-Fi Internet connection by applying your SSID network name and password through your phone's bluetooth. The app can also enable cellular connectivity if a cellular connection is supported by the device. Once connected to the Internet, your device will be able to transmit sensor data and receive commands from remote applications through EDG’s cloud infrastructure. This app is designed to be used only with devices designed and manufactured by Engineering Design Group, LLC.
Screenshots
Verdict
The clearest difference is update cadence: Otrol at monthly against edgLink's every 46 months. edgLink's advantage is device support (3 vs 1) and iOS requirement (13.0 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.
Otrol ships an update monthly, edgLink every 46 months. The most recent releases landed on October 30, 2026 and October 27, 2026 respectively.
| Parameter | Otrol | edgLink |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly — better | Every 46 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 37 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | DoubleVision Technology Co., Ltd. | Engineering Design Group, LLC |
In-app purchases
Otrol
No in-app purchases
edgLink
No in-app purchases
