A lovely niche application! I admire folks who put such effort into very particular solution spaces.

My son is considering switching to a different startup. So of course he built an app to evaluate startups for viability by several metrics. Used it to guide his applications. I ask him, would that app be a viable startup? He said, just a minute, and went and asked it Are you a viable startup? It said Hell no (or words to that affect).

The reason? The space has five or six competitors already. I asked, are any of them the whale in that space? No, all smaller efforts. Then I suggested it was actually an ideal place for a startup that smoothed out the wrinkles in existing flows and made it easier for folks to use. A few smaller competitors isn't "Hell no", its "market validation".