My apps contains no ads and no form of analytics except for what is build into the app store/google play as standard.
Ipview
IPview does send a single http request to my server to determine your public ip. This is logged by my webserver in the standard webserver logs and goes through the cloudflare CDN. No other information is send in this request and all other information is local to your device. If there are problems it also makes a http request to Google.com to check if it can reach the Internet.