Any good self help apps with affordable/no subscriptions?

Hi! I just started my journey on battling with my anxiety and I'm on new medications. I was given a little booklet by the crisis team I'm going to which has a little page about apps I can use. Issue is, a lot of them are paywalled with prices waaay too out of my budget. I'm wondering if there are any good quality apps that don't have that issue or if these apps really are worth the price. Thank you, and happy holidays!