api.potatso.com is for fetching and updating cloudsets and maybe more features in the future (I think you won't want to REJECT them).
potatso.helpshift.com is for feedback. If you don't use feedback feature, you can disable it.
For privacy concern, please go to https://manual.potatso.com/en/privacy for more details. :)
It's funny because I was just using mitmproxy this morning to audit/inspect some iOS apps I use. Password managers etc. Looks like I can do this all on the iPhone now! I can see that Potatso itself is connecting to api.potatso.com and potatso.helpshift.com ...I created rules to REJECT them :P