you are welcome to join the public beta test of the shopping app. You can find the test on the Play Store page of the pro version. Currently we are testing version 184.108.40.206 as a intermediate step to version 5.5.
If any of you are interested in joining the beta test but do not have a pro version, we are happy to give out a limited number of free promo codes. Just write an email to firstname.lastname@example.org.