Enjoyed browsing through this application; I didn't realize how much I wanted to annotate pictures or picture series until I saw your example. Great stuff and I wish this was a feature in Google Photos :)
Right?! My first travel blog was with Wordpress, where I always felt like I had to write a whole article in order to post. Which almost never happened. Then I moved to Facebook, which was OK at first, but then... you know the story. Also, bit rot is real on FB. Then IG, which really doesn't lend itself to posting self-contained albums.
So I really like the idea of having something clean and simple, where you can just upload photos and provide some additional context, and have it look nice.