Checkmate is a social networking app developed by The Marriage Pact Inc. It is available for iPhone users and is free to download and use. The app falls under the category of Social & Communication, specifically social networking.

Checkmate offers a unique feature where users can answer questions about themselves and then scan their friends to see their compatibility. The app uses AI technology to calculate the long-term odds of compatibility between friends. It claims to be powered by the Nobel Prize-winning technology behind the Marriage Pact.

With over 157,300,000 matches evaluated so far, Checkmate provides users with the opportunity to discover their best match among their friends. The app allows users to scan anyone they want, until the developer decides to make changes.

If you're curious to find out who your best match is among your friends, Checkmate might be the app for you.