Convert app to pnm Online: app2pnm
You can use Tom's Editor to easily convert images from
APP .APP to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
APP is an image format with extension APP.
PNM images are uncompressed 24 bit RGB images. Can cannot store Alpha channel. PNM images come in 2 types: binary and text. Especially popular on Linux.