Yesterday, I found this web called New Recruit. It's an online list Builder for several wargames, like W40K, Horus Heresy, WhTOW, Kill Team, AoS,...and other non-Warhammer games. They said also this is compatible with Battle Scribe, and it's multi-platform. Even more, they say this is fully compatible with Warhall, a 3D miniature game simulator.
It's online, as web and app, and offline. And free to use (You can upgrade to Pro, paying of course and gain access to extra features and benefits).
This is the presentation:
"New Recruit is a modern, free, web based army builder.
Historically New Recruit was only available for The 9th Age Fantasy Battles. Over the years New Recruit has been recognised as the best army builder for The 9th Age by thousands of people and it is now available for many more game systems like Warhammer 40k, Warhammer The Old World, Age of Sigmar, Horus Heresy, Kill Team, Warhammer Armies Project..."
And, finally, they have other extras like Wiki, Ladder,...
Just for your consideration