Looking for swimlane planning apps, I found Roadmap for MacOS and iOS on the Apple App Store, also at https://roadmapgo.com/getapps

I'm not as opposed to subscriptions as I once was. An app that doesn't tell me what the subscription will be up front cools my enthusiasm.

It looks nice, though - anyone use it?

I haven't used it but it looks interesting, has a 7-day free trial, and the yearly price is low.

Other options include project manager Quire.io (free for now) or a kanban boards with swimlanes like Kanbantool (which has a free tier).