Game controllers for smartphones and tablets
1. Razer Serval
Compatible with Android (PC support coming)
If you're a gamer, you're probably familiar with the Razer brand name, and Serval is the controller you never knew you needed. It connects to your Android device via Bluetooth and provides a whole host of buttons - two triggers, two shoulder buttons, two analog sticks, a D-pad and four of Razer's Hyperesponse action buttons, even home and back keys to get through the Android UI. The adjustable clip lets you attach a smartphone to the gamepad for unbeatable convenience.
$49.99 (iOS and Mac model)
$59.99 (Android and PC model)
Steelseries is known for their great mechanical keyboards, but the guys are also pretty good at making game controllers. The Stratus XL is the one you should take a look if you're a hardcore mobile gamer. It gives you tons of clicky-feely buttons, great response over a Bluetooth connection, and about 40 hours of use per pair of AA batteries. You don't seem to be getting a clip for your phone, however.
3. Moga Rebel
Compatible with iOS
This premium-grade controller connects to an iPhone or iPad via Bluetooth. It provides plenty of buttons, great grip, and a built-in clip for attaching any recent iPhone model.
Compatible with Android and PC
It isn't the most beautiful controller in the world, but it is one of the more practical. Its foldable design allows it to be carried around easily as it fits in a pocket or any backpack. You also get a phone clip and an Android app for adjusting the input's sensitivity. Better yet, a built-in rechargeable battery gives you over 30 hours of gameplay over Bluetooth.
Compatible with Android and iOS (iCade)
Design is what sets this controller apart. When unfolded, it can accommodate one iOS or Android device of up to 155 millimeters in height. Yup, a Galaxy Note 5 or iPhone 6s Plus would fit in there just fine. And when folded, the controller is easily carried around. The built-in battery provides about 14 hours of gameplay.
Compatible with iOS (iCade), Android, Mac, PC
This might not be the best, most beautiful, most feature-rich controller you can find, but it is the only one that will warm the heart of old school gamers. Okay, it is not exactly the only one because 8BitDo makes all kinds of nostalgia-inspired game controllers.