These apps do not collect any data at all:
1) https://play.google.com/store/apps/details?id=com.dingleinc.texttoolspro
Most of my other apps do not collect any personally identifiable data.
However some apps use Google Admob, the advertising network I use in my apps, and it may collect or use your data, see https://policies.google.com/technologies/partner-sites.
By using my apps you understand that this privacy policy maybe changed at any given time to better reflect what data my apps collect.