App.ver

The version of the app, as the app itself reports it.

CurrentstringOptionalSince 2.0

Field facts

Buyers use it to spot outdated builds and to trace rendering problems to one release. Send the version string exactly as the app publishes it.

Where the field sits in a payload, with everything else left out:

{
  "id": "req-1",
  "app": {
    "ver": "5.12.0"
  }
}

Added in OpenRTB 2.0, and present in the latest snapshot. The table shows how each version's spec text types the field.

Versions	Type in the spec	Required	Deprecated
2.0 to 2.2	string	No	No
2.3 to 2.3.1	string	No	No
2.4	string	No	No
2.5 to 2.6-202606	string	No	No