Feedback on side project that suddenly gained +1000 users

I’m currently working on Hoardo (www.hoardo.com), a simple web app I originally built to solve my own storage problem. The short backstory: after a move, a wedding, and a baby in one year, our storage room turned into chaos. I first tracked boxes and their contents in a Google Sheet, which worked — until it became painful to use on mobile. So I turned that system into a small app for myself: rooms, boxes, items, and search. I recently shared this story in a Reddit community for organizers and it unexpectedly went viral, bringing in 1,000+ users in a short time. At the moment the product is free and web-based. My current thinking is to keep it that way and only consider monetization later by building a native app with a very cheap subscription if I reach ~10k users. Would love feedback on the product and whether that path makes sense, and what you’d focus on validating next.