That link is for Orbot app.
Haha, my bad. I just assumed since you were talking about Tor you had linked to the Tor browser app without actually clicking on the link. But yeah, Orbot is great. Also check out Orfox from the same people.
VPN's definitely have their use case. But enhancing anonymity/security is none of them.
Well, that's not entirely true. If you suspect that your ISP is monitoring your traffic and handing it over to your government (for example), then a (good) VPN is better than nothing, but obviously inferior to Tor. It all comes down to who your trust more - your ISP or your VPN provider - but it's still better to eliminate trust altogether and use Tor.
This is how I feel comfortable when using google chrome browser.
I don't avoid Chrome because I think it is a security risk. Sure, hackers might not be able to steal anything via your browser, and any critical bugs are rapidly patched, but that is not my concern. I avoid it because it is a privacy risk. If you use Chrome then Google keep a record of
everything you do online. If you log in to anything using Chrome, then that entire record is now linked to your email address +/- real identity. Google's Privacy Policy allows them to share and sell that data with anyone they like, including governments . Google Chrome is a surveillance tool at this point.