Modal Skulpt is my go to mobile synth. Battery powered and comes from the factory with a lid to protect it. I've beaten the crap out of mine over the last few years and it never misses a beat. Even took it to 12,000 ft on a backpacking trip.
It's the only piece of gear I own that I don't worry about how I handle it. I'll jump in the front seat of the car and toss it in the back seat over my shoulder. It was designed to be mobile rather than just a synth that's small enough to be mobile.
When you click communities in the menu it gives you the amount of subscribers for each one.