@gcr0003 - My iPhone doesn't bring up the 2-step verification window in the Tapatalk app, nor the option to "Send and Trust 30 days". I'm guessing you've got an Android phone. Is that the case? If so, it would appear that the Android Tapatalk app has capabilities not available in the iPhone Tapatalk app.
If I sign in to Saddlehunter.com through the iPhone Tapatalk app while 2-step verification is disabled on my Saddlehunter.com account, it lets me in and will keep me logged in to Saddlehunter.com through Tapatalk even after I re-enable the 2-step verification on my desktop computer. But it only lasts for a few hours ... then Tapatalk loses the connection with Saddlehunter.com and can't re-establish it while 2-step verification is enabled. Thus far, I haven't been able to figure out how to keep the connection to Saddlehunter.com indefinitely active through Tapatalk when I re-enable 2-step verification. For now, I've just relegated myself to using Saddlehunter.com via the iPhone web browser (Safari) when I want to read or respond from my iPhone.
For what it's worth, I had purchased a lifetime membership to Tapatalk over a year ago for $30. Even with that membership, I'm having the problems I described above. I don't know if Tapatalk still offers a free version, and I can't really tell since my iPhone knows I have a lifetime Tapatalk membership now. (It doesn't show me the other options now.)