Google has announced a new app with a quest to help users understand, control, and save on their mobile data. 

Applications frequently use data in the background for updating content and information but with Datally  users can control data on an app-by-app basis, so that data only goes to apps they care most about.

Beta testers who have used Datally since early 2017 said they were able to save an average of 30 percent on data, Google reports.

A bubble showing data use appears every time an app is opened. The Wi-Fi finder, on the other hand, helps the user find a “reliable” wi-fi nearby as some wants to use more data than they have on their mobile plans, such as when they want to watch HD videos.

“It’s like a speedometer for your data,” Google said.