American Printing House for the Blind (APH) has created Visual Brailler, which is a simple braille editor. This free app allows you to turn your iPad into a virtual braillewriter.
Features include:
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6-dot braille on-screen keyboard
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Support for any and all 6-dot braille codes
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An indefinite number of 40-cell braille lines
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Cut, copy, and paste braille manipulation
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Refreshable braille display input and output
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BRL (unformatted) and BRF (formatted) braille file export
https://itunes.apple.com/app/visual-brailler/id888739587