Data Manager - ok, sort of... – Data Manager - Monitor Data Usage Review

I was using this app for a few months to track my family's shared data usage and then an update reset my rollover day. Why would they do that? My month end date is the 12th or so and after the last update all the counters reset on December 1st. Are you guys even paying attention?
Review by Blitz325 on Data Manager - Monitor Data Usage.