The app right now has two separate sliders. A brightness slider that adjusts the backlight and a contrast slider that does exactly what ScreenFilter does. It is stable according to my testers.
I'd like to sell it for $0.99 (with a seven day trial version). :-) I wonder if Amazon will accept it for the Kindle on their appstore. It takes them about a week to approve an application for the appstore, and then I don't know how many more days to accept it for the Kindle. Maybe I can accept paypal payments in the meanwhile, though advice would be appreciated.
I still need to add one more feature, namely access from the notification bar.
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