This app let you create a QR code for your website or you can scan a QR code.
You have to just put your website name in the textbox and then click on create qr code . Then if you want to share you have to just click on Save Qr code 2 times . When you click for the first time it's replica is produced the on 2nd click it is saved in your device .
Android>data
Then their will be a folder name appinventor.ai_14scrystals.QR_CODE_CONVERTOR, just click on it after that go in files the you will find the QR code which you have created and then you can share it . Other way is to scan the QR code which is in the next screen.