Your review lacks a lot of details but i will try to answer anyway. Accuracy and efficient GPS filter belong actually to the focus of the app. You can even compare the raw data with the filtered one. MeeRun does not have any influence on the raw data, if you get inaccurate data, that can be because you are using wrong filter settings. Don't hesitate to send me the GPX files. If possible, also the .mrgpx files In the .MeeRun/Trainings directory.

The power usage should also be much much lower with the latest version, maybe you are using an outdated release you found in internet or the wrong app