Milyo is available for free in the App Store.
The basics: Make your profile stand out with your best pics and a little something about you to increase your match-making potential. Swipe Right on a profile to Like someone, swipe left to pass. If someone Likes you back, It’s a Match!
Upgrade to Premium for additional features, including changing your location to match with singles anywhere around the world, see who's liked you, hide your profile and take advantage of unlimited Likes and the Rewind feature to give someone a second chance.
With Premium you can also take advantage of sending messages, even before being matched with someone, as well as sending a SuperLike to stand out from the crowd.
To upgrade to Premium, tap Accounts > Upgrade > Subscribe.