I don't like any "gratis" phone apps. I cough up the dough to maintain a dedicated, private Hobby phone to avoid problems, and have had the same number for 10 years.
Like they say about "free," you get what you pay for.
As to the OP posting his number in public, just shaking my head. Aren't you afraid someone (family, friend, or foe) will track you; steal the number and your handle to impersonate you; or barrage you with spam or scam calls?
I wouldn't be concerned about tracing back to the guy. One would hope that number is another phone app number. But you may get some dumb ass calls from folks here would be the most i expect.