Which is not unreasonable. I had a lot of success with Runna, which is also essentially premium only; you get the first two weeks free, but all running plans are longer than that. Runna is about £100 for the annual subscription.
Runna doesn't get everything right. It didn't seem good at adjusting your plan based on performance, if it even tries to do that at all. My first few weeks of runs were much too easy, and I had to experiment with manually generating different plans with faster and slower target race times until the zone paces seemed right for me. Would have been great if it adjusted on the fly and I could have kept the same plan.