Reminds me of Simple Note, which I've been using ever since Evernote became slow and bloated (https://simplenote.com/).
On top of that, I find their organization features not very good. The ability to tag notes seems neat at first but it can become very messy very fast. Completely freeform tagging requires a lot of discipline to not get out of hand, nested tags make this even more difficult. This is especially true for a notes app that is supposed to last you over many many years and possibly hold thousands of notes at some point.
I personally bought Ulysses and use that as my notes taking app for text-only documents, and Apple Notes for short-lived image related notes.
In any way, my point is, I personally rather pay a price and own the piece of software than renting an app. In the case of Ulysses, I can still use the same version that I currently own in 10 years even if the company behind it goes out of business (given it will still run on our machines that we use at that point) + updates until the next paid upgrade (if that happens). I am not locked into a sync solution and can freely switch from iCloud to Dropbox to <other folder sync technology> to make it future proof.
Bear on the other hand is even more uncertain. Sure, the subscription is helping the developer to keep the app running but once I stop paying that, I will loose crucial features. Also a subscription doesn't guarantee that something unexpected will happen to Shinyfrog (the company behind it).