Do I need a privacy policy and terms of service for testing my web app to users in this or any other forum ???
If you're targeting EU users you probably do. But even if you don't it's a good idea to have one and disclose what data you collect, store, and how you do and don't use it.
I don't think many people read them though. I know I generally don't.
is there an actual free way to generate them online... every service I can find asks for money...
I have one I copied years ago and modified to suit myself. It's both a "privacy policy" and "terms of service". Feel free to snag and edit it. You can find it here:
https://azartiz.com/tos.html
Thanks , Is it gdpr compilant.. ???
I can't say. I've not looked too hard at gdpr because I don't advertise or do any marketing at all to foreign countries, and since I don't collect data to sell or use in anyway I haven't worried about it.
No - don't worry about that.