How to scan documents on a LG smartphone or tablet

LG G Pad 8.3 LTE V507L LG G Pad 8.3 LTE V507L
LG Optimus L2 II LG Optimus L2 II
LG Google Nexus 5 LG Google Nexus 5
LG GX LG GX
LG Optimus L1 II Tri LG Optimus L1 II Tri
LG L40 Dual LG L40 Dual
LG L40 LG L40
LG L70 Dual LG L70 Dual
LG L70 LG L70
LG L90 Dual LG L90 Dual
LG L90 LG L90
LG F70 LG F70
LG G Pad 8.3 LTE VK810 LG G Pad 8.3 LTE VK810
LG F90 LG F90
LG F90 LTE LG F90 LTE
LG F90 Lucid 3 LG F90 Lucid 3
LG Optimus Exceed 2 LG Optimus Exceed 2
LG L65 Dual LG L65 Dual
LG Isai FL LG Isai FL
LG L65 LG L65