Hitleap is known as the best bot for traffic. Hitleap can be used as a free version but it can hold only 3 sites. If you upgrade your hitleap from free to premium then it can hold upto 15 sites. You can earn minutes by using hitleap app or you can buy minutes package. You can sign up with this link:

http://hitleap.com/by/simranangel

if you can make referral then you can earn more. For the proof I have kept the screenshot link:

http://prntscr.com/daegj3

if you need any other info, please comment. thank you.