InstLike -Free instagram likes doesn't seem like it should work, but it really does boost your likes and followers on Instagram. It makes you jump through hoops to unlock more of the credits you need, though. If you don't mind giving up your Instagram account information, it's a good way to buy popularity.
InstLike -Free instagram likes makes you earn credits to buy likes on Instagram. You start with 20 credits (which equals 20 likes) and can earn more by promoting the app or by using the app's "auto-liker" feature to like hundreds of photos. It takes a while for the auto-liker to generate new likes, usually about two hours. If you don't want to wait, you can buy more likes at 100 for $1. You don't have to wait at all once you've bought likes, though. They hit your photos almost instantly, but come from accounts that seem a little less than genuine. You can assign your likes however you want, whether you want to paste them on one photo or spread them out among all of your pictures. The app won't win any awards for its layout. Though it looks kind of like Instagram, the app's interface is very sparse and is loaded with broken English. It doesn't have any advanced settings, either. However, most users who use this app won't care how it looks.
For what it's worth, InstLike -Free instagram likes will make your pictures seem much more popular on Instagram, at least on the surface. If you're willing to spend cash or spend time earning credits to get that popularity, this app could be for you.