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I am in search / would love to have an app that would help me determine right exposure for my film photography.

I would address this to those who shoots nice (some would say vintage) cameras and film be it a Minolta, Nikon, Yashica, Canon, Fujica or Mamiya.

A nice light meter is always handy, but to be honest I do not have one. Some use a digital camera, DSLR to check exposure with difficult scenes to "meter" instead the film camera. Since I carry my Jolla with me, I would like to have an app with options to:

metering: This includes spot, and matrix, and average metering that is usually not available in older cameras. Since phone cameras are fixed apperture, exposure is controlled by their shutter speed. Some calculation and even user calibration (to the film used in the real camera) would be needed to show exposure options to achieve the shown image. I'd use this to nighttime photography, to check the right time for exposure, as well as checking extreme or difficult scenes.

exposure example taken with the Jolla's camera: Taking a picture with the camera or a series of pictures, that could be compared next to each other to help selecting the right shutter speed and apperture.

help me with some environmental data: temperature from weather forecast sunrise and fall times, golden hours from GPS data moonphase compass to show ... well, not north, but west and east

note taking and exif data logging: simple notes and exposure data to be saved with film counter numbering environmental notes saved with date, time and position

There are many functions that others could think of, please add Your ideas, and vote up if You want to encourage experienced programmers. Thanks

I am in search / would love to have an app that would help me determine right exposure for my film photography.

I would address this to those who shoots nice (some would say vintage) cameras and film be it a Minolta, Nikon, Yashica, Canon, Fujica or Mamiya.

A nice light meter is always handy, but to be honest I do not have one. Some use a digital camera, DSLR to check exposure with difficult scenes to "meter" instead the film camera. Since I carry my Jolla with me, I would like to have an app with options to:

metering: This includes spot, and matrix, and average metering that is usually not available in older cameras. Since phone cameras are fixed apperture, exposure is controlled by their shutter speed. Some calculation and even user calibration (to the film used in the real camera) would be needed to show exposure options to achieve the shown image. I'd use this to nighttime photography, to check the right time for exposure, as well as checking extreme or difficult scenes.

exposure example taken with the Jolla's camera: Taking a picture with the camera or a series of pictures, that could be compared next to each other to help selecting the right shutter speed and apperture.

help me with some environmental data: temperature from weather forecast sunrise and fall times, golden hours from GPS data moonphase compass to show ... well, not north, but west and east

note taking and exif data logging: simple notes and exposure data to be saved with film counter numbering environmental notes saved with date, time and position

There are many functions that others could think of, please add Your ideas, and vote up if You want to encourage experienced programmers. Thanks