After Appcelerator launched the Marketplace I managed to create and post an iOs only module that is able to create QR codes directly on the device without using an online service.

It can generate all types of codes (from 1 to 40) and with any level of correction (L, M, Q, H). You can also customize the size of the resulting QR code and it will try to adapt itself to this size to remain perfectly sharp and fully visible.

For now it’s able to generate these types of content:

• pure text
• SMS (phone number, message)
• phonecall (phone number)
• email ( to, subject, message)
• geo (lat, lon)
• url

You can buy it from the Marketplace: QR Generator module.