After getting the crash issue resolved (it is now fixed), I tested this to see how it behaves by using PCAPdroid. I also attempted to decrypt the traffic, to see what it sends.
This is the traffic analysis:
Type
Port
IP version
Size
Status
DNS
53
IPv4
Random >120 B
Closed (Good)
TLS
443
IPv6
120 B
Unreachable
HTTPS
443
IPv4
Usually 2.4 KB
Error (Did not trust my decryption certificate)
It sends to a random list of hosts, all of which are listed here:
I was about to make a pull request to expand the list to the top 109 websites, but the developer blocked me from all interactions because I "spammed too many issues" (I opened 5 and they were all legitimate). Buggy software gets multiple bug reports, what a surprise... The software (or at least the idea) has a lot of potential, but a lot of work and care needs to be put into it.
Only two of your five issues were bug reports, one of which was not really useful - various android makes have their own optimizations that can kill the app in the background, there's very little devs can do to stop this.