What tartan is this please?

[Tobus]

Also, does anyone know if a tartan recognition app has been created yet? That would be super helpful.

The tartan ferret is the closest to a recognition app that I'm aware of. http://www.tartansauthority.com/tartan-ferret

It's a bit awkward to use when you're trying to input colour combinations, and I never seem to get satisfactory results from it. But perhaps I'm just not using it correctly.

I couldn't find your tartan on there either. It may very well just be a fashion tartan or imitation tartan. It is very, very similar to the Black Stewart tartan, without any blues or greens. Beyond that, I haven't the foggiest.