There should be in-app PDF rotation feature
The PDF can be rotated using mobile's auto rotation sensor. This auto rotation feature consumes battery as processor keeps taking data from gyrosensor. You can provide in-app feature to manually rotate a page or complete PDF clockwise or anticlockwise without the need of Mobile's own sensor.
In night mode, black and white mixture gives eye paining contrast. Can't you provide golden yellowish background or give user manual control to set page colour and amount of white-wash to reduce the contrast.
I have been waiting for this in each update.

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Anonymous commented
How can I rotate my email attachment loan application is sideways and I can not fill it out
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Anonymous commented
Agree, thanks for input, yellow but green is better!