Cronometer mobile scanner ap

Hello just joined. trying to learn how to enter food details, I see there is Cronometer mobile app that allows one to scan the food packet then you somehow use your phone to transfer the scanned data to the chronometer food data base, I learnt this from one of the training videos unless of course I have misunderstood the instructions, I use a Samsung Note 4, I cannot find the Cronometer app, can any one help. Thanks