In just ~160 users, you are planning to switch it to the paid app, which is not good decision from my point of view. And App is about what?
what you are providing which is not available in the other free apps?
when you launched the application? if it's not more then a year, you should first work to increase the downloads and after that think about switching to paid!
Thank you for your reply!
Here is the APP link Customer Attentioner
Actually APP is published since Sep 2018 and its very simple and I just want to charge $0.99 so I can afford hosting and other maintenance of this APP.