I would try to use GPSLogger, it is capable of sending data to dawarich and is really reliable. AFAIK, the Owntracks app has a queue and normally sends the data back when it is online, but I also found that this is sometimes not the case, and there is no way of restoring it then. GPSLogger has the advantage that it stores the GPX file also on your phone; if something goes wrong, you can still grab that and upload it.
Colota also seems like an awesome alternative. I’ve only heard good things about it.
I would try to use GPSLogger, it is capable of sending data to dawarich and is really reliable. AFAIK, the Owntracks app has a queue and normally sends the data back when it is online, but I also found that this is sometimes not the case, and there is no way of restoring it then. GPSLogger has the advantage that it stores the GPX file also on your phone; if something goes wrong, you can still grab that and upload it.
Colota also seems like an awesome alternative. I’ve only heard good things about it.