I have an app for you. try Pocket Braille. Get the paid version which I think for me cost 3 or 4 usd. i can't remember now. It's been a year or so. While it won't give you places to type contracted braille, it will give you the contractions, and the dot combinations. So, for example, it will say, about it will say: dot 1, dots 1-2. Apart from this, I don't know of any other apps out there. I wish I could be of more help.
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Pocket braille
I have an app for you. try Pocket Braille. Get the paid version which I think for me cost 3 or 4 usd. i can't remember now. It's been a year or so. While it won't give you places to type contracted braille, it will give you the contractions, and the dot combinations. So, for example, it will say, about it will say: dot 1, dots 1-2. Apart from this, I don't know of any other apps out there. I wish I could be of more help.
or simply
Take a braille handbook and learn. cheers!