Exif Notes is an Android application that let's you quickly make structured notes in the field when doing film photography. It has about 1,500 active installations through Google Play.
According to the Exif specification Annex C page 122 (or 128 of the pdf), ApertureValue and ShutterSpeedValue are calculated according to functions. However, ExifNotes writes ApertureValue the same as FNumber and ShutterSpeedValue the same as ExposureTime
ExposureCompensation is not defined in Exif, however there is an ExposureBiasValue, but it is a decimal not a fraction number.
So, I suggest 3 improvements:
Calculate ApertureValue from FNumber
Calculate ShutterSpeedValue from ExposureTime
Replace ExposureCompensation with ExposureBiasValue and use decimal numbers for it.
ApertureValueandShutterSpeedValueare calculated according to functions. However, ExifNotes writesApertureValuethe same asFNumberandShutterSpeedValuethe same asExposureTimeExposureCompensationis not defined in Exif, however there is anExposureBiasValue, but it is a decimal not a fraction number.So, I suggest 3 improvements:
ApertureValuefromFNumberShutterSpeedValuefromExposureTimeExposureCompensationwithExposureBiasValueand use decimal numbers for it.