for iPhone users now available 4 malayalam keyboards app
This apps is the easiest way to type in Malayalam using just the English keyboard
one is Manglish is a transliteration keyboard that allows user to type in English and convert that to Malayalam.
second uses a technique called “transliteration” that enables you to type the Malayalam pronunciation in English, instantly giving you back the word written in Malayalam
3rd one is a Handwriting Keyboard, you can write malayalam in screen
4th one color full keyboard