CompareOpen in Google PlayApp info
- Installs
- 1,000+
- Category
- Entertainment
- Content rating
- Everyone
- Version
- 1.1.02
- Released
- Nov 13, 2025
- Last updated
- 11 Apr 2026
- In-app purchases
- No
- Contains ads
- No
- Promo video
- No
- Requires Android
- 7.0
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What's newin version 1.1.02
Added compatible relay offer with enhanced analytics.
About this app
Control USB relay devices locally or remotely. USB relay hardware required.
Read full description
Relay Controller lets you control USB relay devices directly from your Android phone using a USB OTG cable. No PC, no Raspberry Pi, and no programming required. ⚠️ USB relay hardware is required. This app is intended for users who work with USB relay modules. Features • Direct local control of USB relay devices via USB OTG • Real-time monitoring and switching of relay states • Optional remote control without cloud services Remote control You can control your USB relay remotely by pairing another device. Pairing is simple — just scan a QR code or enter a short access code. The remote device does not need to install any app. It works instantly in any modern web browser, including: iPhone, iPad, Android devices, PC, Mac, or tablets.