The real issue is the trial. Auto charge trials, especially ones I'm unsure of, are a turnoff. This brings me to 3 issues...
* 7 days is psychologically a short time to try this. For me, this means I have to set aside time in this coming week to set everything up and see how it works. A longer trial period might help.
* The auto charge at the end of the trial is, as mentioned, a dark pattern that I avoid whenever possible. If I'm not 90% sure I'm going to use the product, I won't sign up for something that needs my credit card in advance.
* The free option is too limited for me to start entering data and come back later. It's also missing functionality I think I'll need later. I have to pay at least $14, and setup an auto-charge, to pick up where I left off later, so this is a non-starter for determining if the product is worth the $14 to begin with.
In short, it might be worth $14 a month and it is even likely to be worth the ~ $100 a year, but the limitations and requirements around the trial keep me from feeling comfortable finding out. The most off-putting is the auto-charge, which make me nervous in any case.