Ezzi Keyboard is described as 'Use your Mac to type on your iPhone, iPad or Apple TVs (2nd, 3rd and 4th generations)'. There are seven alternatives to Ezzi Keyboard for a variety of platforms, including Mac, Android, iPhone, iPad and Windows. The best alternative is Typeeto. It's not free, so if you're looking for a free alternative, you could try KeyPad Bluetooth Keyboard. Other great apps like Ezzi Keyboard are 1keyboard (Paid), Type2phone (Paid), across (Paid) and Mocha Keyboard (Paid).
Typeeto is an app that enables you to use your Mac keyboard as a Bluetooth keyboard for other devices such as iPad, iPhone, Apple TV, Android device, etc. Now use a full-scale keyboard to type in a text and it will be displayed real-time on your device screen.