A free app for Android, by cinetica.
ThingView is the perfect tool to view and interact with your thingSpeak channels in an easy way. It works for both public and private channels. With it, you can view data in a variety of chart types and have the possibility to set the time frame, the date range, and even the number of results to show. You can also download and share your data with your friends.
To use ThingView, you need to have a ThingSpeak account and a valid API key. The application itself is very simple and easy to use. Simply enter the channel ID to get the data for that channel. You are ready to go. The application will automatically display the data for you in the form of a chart.