This editing app aims to become your ultimate go-to whenever you want to attain a particular look - which you cannot do in real life because - 

a.) you could be allergic to lipstick, and/or other kinds of lip products; 

b) you desire a particular lip color, but you can't find the exact shade in real life; 

c.) there are selfies in your gallery with a lot of potential - except your lipstick had faded; 

d.) or you wore the wrong shade; 

and e.) you just want to see how you fare with green lips