Nice interface, functionality needs work – Data Manager - Track Usage of Mobile/Wi-Fi Data Plan Review

I've used this app (Version 1.0.2) for a few weeks now. The interface is decent but the accuracy has been bizarre for me. There are many times when it overestimates my 4G LTE data usage for the day by a few GB. Then it will try to compensate by applying a negative correction within the next week in an attempt to keep the monthly total accurate. Unfortunately, this approach does not always work since the correction sometimes occurs when the monthly cycle has already rolled over. For example, say I'm at the end of my billing cycle and it overestimates by 3 GB. Then I move to the next billing cycle. Should start from 0 right? Instead it applied the negative correction and I started at -3 GB for the next billing cycle. I also wish it was possible to track wifi and mobile data usage on separate monthly cycles. Since the main purpose of the app is to accurately track data consumption, it's hard for me to recommend it at this time. I like the interface so hopefully these bugs will be corrected in future releases.
Review by AvexTouch on Data Manager - Track Usage of Mobile/Wi-Fi Data Plan.