Right off the bat Rival Stars Horse Racing is probably one of the best horse racing games you'll play and it's free for iPhone and Android. The game allows you to select your jockey and horse and then customize them to your liking. From there, you can race. 

You'll have the opportunity to participate in some rookie races to start out. The graphics look solid and it makes you feel like you're right there at the course. Just keep in mind that it's harder than you think to win a race. Even in your first one, it might be tricky. 

And since this is horse racing, just remember that there's only one lap around the track. So be sure to make the most of your situation. The controls are easy to pick up and play, but there are just certain factors to keep in mind that can give you an edge. Here are a few tips to help you with the reins.