This page is for an offline MOBILE iOS/Android APP version, not desktop/laptop. To vote for a desktop app, see: http://feedback.noteflight.com/forums/4962-tell-us-your-thoughts/suggestions/6796778-offline-downloadable-versionPaul commented
I totally agree, an app would be awesome. I've just started learning guitar and found the site, it has such huge potential. I'm using the tool to practise, a great alternative to a metronome, just for beginners like me.