Seeking an accessible dbt diary card app that helps with skill building

Hello,
I am a voice over user, and I am about to start working in dbt. I need an app for diary cards that will also help me with skill building. I read online dbt coach is accessible, however it costs five bucks. I kinda could do that, just not quite yet. I am wondering if there are other apps out there that do the same thing that are free, and if that app is actually accessible. I don't want to spend that money if its not actually accessible. If anyone could fill me in that would be great.