The reflected mode is read through the phone's camera, while the incident light is read by the light sensor on the face of the phone. To test the accuracy I used a real Sekonic light meter alongside the phone app. In all cases the reading were identical.
The Lightmeter APP comes in two versions, a free version with ads and a paid ($2.69) version with no ads but with several added adjustments features, such as an alternative drop-down ISO chooser, a vibrate-on- measure feature, both incident and reflected EV fine tune calibration scales, and a low limit EV test.
|With the paid version of the Lightmeter APP it is very easy to calibrate the meter to synchronize with a control meter -- in this case a small and very handy Sekonic L-308S I usually carry with me when shooting with film. On the pull-down menu (tab on top of screen) adjustment sliders are available for both the incident and reflected modes to +/- 4EV. As you can see above, both meters are reading exactly the same in their incident mode -- pretty impressive for a $2.79 APP.|
The button on the top right switches the meter from incident to reflected. A lever on the bottom can be moved right or left to zoom the reflected reading area. Pressing the large bottom "Measure" button allows the incident meter to read continuously.
-Incident light metering (needs light sensor on the phone)
-Reflected light metering (needs camera, not all phone cameras are compatible)
-Spot measure if camera has zoom.
-Support for all screens, including extra high resolution.
Manual Flash Calculator 2:
Manual Flash Calculator 2 is a handy free utility APP for determining subject distance when using photographic flash in manual mode.
The calculator is straight forward and easy to operate with sliders for Aperture, ISO, Power, and EV. Simply enter the flash guide number on a separate screen and dial in any of the variables, and the distance will change accordingly. What I like about this APP is that it is simple to use, and always accessible on my phone
• Aperture range F/1.2 to F/22
• ISO range ISO50 to ISO6400
• Flash output from 1/1 to 1/128th
• Flash exposure compensation to +/- 5.0 EV
• All settings available in 1/3 stop intervals