Venmo, a payment application with a  social media aspect, does not blur out their snapshots (at the time of this writing), so keep this in mind when looking for evidence of use and purchase history.

And as mentioned previously, details of transactions could also appear on the device if the user allows Notifications from this application and also as a by-product of transaction notifications that are delivered via SMS or email as many users have configured as part of the application settings.

In the picture above from an Android device, the most interesting information was contained within the venmo.sqlite database located at:
USERDATA/data/com.venmo/databases/venmo.sqlite

User information is contained in table_person table and transaction history can be located in the marvin_stories table. This includes both those transactions that are marked public or private, which is just recorded in a column in the SQLite database.