I believe the apps only pull whatever information is in the barcode on the back of the idea - only law enforcement can actually check the ID against the DMV database.
I scanned the 2-D barcode on my license using a generic barcode reader on my phone, and it's a PDF417 barcode that contains all the information that's printed on my id (number, name, address, license type, physical descriptors, dates, organ donor) as well as a few other fields (revision number of the card format, and an inventory control number that looks like the concatenation of the DL number, state name, license type, and some other fields)
I scanned the 2-D barcode on my license using a generic barcode reader on my phone, and it's a PDF417 barcode that contains all the information that's printed on my id (number, name, address, license type, physical descriptors, dates, organ donor) as well as a few other fields (revision number of the card format, and an inventory control number that looks like the concatenation of the DL number, state name, license type, and some other fields)