+1 for MyLightmeterPro, used as reflective and with the Luxi incident dome, with the caveat that I use it on an IPhone 6 and that I have not used other apps for comparison. The reflective mode allows measurement of relatively small parts of the image field, and used with the incident dome, it duplicates incident reading made with my Sekonic and Luna Pro meters. You can also calibrate the meter + or - one stop in third stop increments. Works for me, and I am confident enough of its accuracy that I will sometimes leave the dedicated meter at home on casual photo jaunts. Hope this helps.
Bookmarks