There are definitely paid features on some dating apps that are worth the price, but I've yet to be able to justify shelling out cash for love. Chappy is free to download, though as their user base grows, so too might potential in-app purchases. Best gay app that hetero folks also use.
Best Apps For Friendship. You can also upload multiple photographs on the app and search for other members using popular hashtags. In fact, the service's explicitly stated goal is to get you to the point where you've deleted the app altogether.
It also provides numeric match predictions based on compatibility, though it isn't entirely clear how those numbers are calculated. Although it is supposed to be more tailored to users personal preferences, they will have a smaller number of potential dates to choose from.
Still, it's nice to have an app to call your own.