You bet we do! We've just released our first version of the mobile companion app. Right now, it's designed primarily to provide a more seamless experience for sharing Stories to Instagram. Lots more to come in future though, so stay tuned!
For now, only published, vertical format videos you've made within Lumen5 desktop app will be reflected in the mobile companion app.
For creating and editing videos, you'll still need to use Lumen5 on a desktop or laptop computer.