Arduino IoT Control Devices App.
You can control your devices with ThingSpeak.com on Android App.
Control 2 Devices
Set your Channel ID and Field for your control.
Free Version with Ad.
More Details in My Blog.
What is Thingspeak?
ThingSpeak is an open source “Internet of Things” application and API to store and retrieve data from things using HTTP over the Internet or via a Local Area Network. With ThingSpeak, you can create sensor logging applications, location tracking applications, and a social network of things with status updates.
Getting Start with ThingSpeak.com