Ask HN: Waking up to the app age. Now what?

I have a popular website - you might call it webapp these days. Been a hobby so far. Its been running for years now. It makes me some adsense money and thats it.

I closed down my last startup lately. Now Im tinkering with ideas what to do next. I will probably build this webapp into a business.

It has a fancy short name. Today I checked the ios and android appstores and to my surprise no apps with this name are out there.

Should I wait until I have apps ready (in 6 to 12 months I would guess) or somehow register/block the name with a quickly built app or something?