Collect From Playstore
Ecency truly great app for free upvote. From here we can earn points in different ways. And with this point we can take upvote for free. From here we can earn 99+ points by referral. Ecency gives us 15 points for each post. Each upvote is giving 1 point. If we comment on a post, it will give 5 points. If I reblog someone's post, it will make 1 point. There is also Daily Point, which is available for free. And you can use this point to get free upvote. If you have 150 points here, you can get 1$ upvote in your post.
You can use these apps to get free upvotes and earn more.