Razer's new take on this is called Kishi, and it stands out for two major reasons. First, it uses a USB Type-C connector rather than Bluetooth, promising less input latency for games that require more precise timing. It also offers a more universal fit than the Junglecat, with a pretty good range of sizes supported by its design.
The Android version of the Razer Kishi costs $79.99, so it's definitely an investment, but if you're really looking to improve your experience, it's worth considering. This review is based on the Android version, which was loaned to us by Razer.
Razer's new mobile controller has a very comfortable split design that makes it much easier to play your favorite games on the go. With generally great controls, it's a great option.