Camera FV-5 ($4) is a professional camera application that gives manual control over settings such as white-balance, ISO & aperture among common features that help take better shots.
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Pro Control over ISO, exposure times, and f-stop
Much like a dSLR, Camera FV-5 gives users control over light sensitivity, time that the shutter is open, and f-stop.
Pro Exposure compensation
In order to reduce the chances of over exposure, there is an option where exposure compensation can be activated.
Pro Exposure bracketing
Camera FV-5 has a setting where several pictures will be taken in rapid succession at different exposures.
Pro Night HDR timelapse
This app takes lets users take long exposure shots and stitches them together in order to produce bright time lapses taken at night.
Pro Free version
There's also a free Lite version.
Con Menu is stuck on landscape mode
Even when the device is held in portrait, the app's menu is stuck on landscape. This bug makes it more difficult to read whatever is displayed.