What is way to go to implement leaderboards/achievements for solo developer?

It really feels like it should be easy to implement leaderboards/ac$$anonymous$$evements on both android and ios. But from what I see it really is not. As I find out, for an indie developer it's better to rely on "Google play games" for Android and "Game center" for IOS, however I can't afford spending months implementing both and than dealing with troubles. Should I consider buying an asset e.g Native plugins asset