Generate QR Codes for address books (vcard), events (vcalendar, vevent), emails
(mailto), geo coordinates (geo), telephones (tel), sms (smsto), urls (http:// or https://), plain text, wifi
string and more. Also allows you to select your error correction level from L (Low 7%), M (Medium 15%), Q
(Quartile 25%) and H (High 30%).