PAR and PPFD Meter Apps for iOS: 2022 Edition | by Dominik Maglia | Medium
Photone - Grow Light Meter on the App Store
PAR meter APPs tested & compared for accuracy - MIGROLIGHT
Light lux meter App to PAR meter hack | Android Smartphone PAR meter hack | I have calibrated the Android 'light Lux Meter Free' app by Doggo Apps against the Asensetek Spectroradiometer