companionapp
nounUK /kəmˈpænjən æp/
US /kəmˈpænjən æp/
A companion app is a small program on your phone that works together with another device or game.
I use the companion app on my tablet to check my game stats.
RELATED WORDS
OTHER MEANINGS
2. An app that pairs with a video game to show extra maps or items.
The game's companion app shows a map of the whole world.
3. An app that works with a wearable gadget like a watch.
The watch needs its companion app to count your steps.
4. An app that helps you manage a smart home device.
The lamp's companion app lets you change its color.