Analog Photography Assistant Analog Photography Assistant (APA) is a free, ad-free, privacy-first android app for film photographers. APA v1.1.0 is the first post-launch release and focuses on UX improvements and bug fixes. I got a lot of feedback from the folks in the 35mmc community ranging from requests to add additional f-stops and ISO values to the light meter, through to reports that in the northern hemisphere the compass displayed bearings that were inaccurate by 180 degrees. Whoops.