One question I can’t find the answer to is regarding connecting a single Striso board to an iPad. What cables are needed to make this work? Do you need separate power and MIDI cables or will the iPad power the Striso?
What are your favorite iPad apps for driving with the Striso?
Hi! I guess a USB-B to USB-C cable should do the trick. Optionally an in between data- and loading adapter should still allow to charge the iPad while playing.
But I think @mtyas has used such a setup, he could give the definite answer 
My iPad (9th gen) still has the Lightning connector. I have a Lighting-to-USB (A, I think) so maybe a USB-B to A cable would do it. But I have another controller, the Exquis, that won’t work like that as it needs too much power from the iPad. I still haven’t found a good way to connect the Exquis to the iPad. I’m hoping the Striso might be better.
I have the old-enough-to-be-Lightning-connector iPad, too, and it works just fine powering the Striso. The adapter is the one billed as “camera” adapter, and it will also let you play while charging, if you are low on charge.
As far as apps go, there are so many that work so well. A few of my favorites:
ThumbJam: first, and in some ways, still best. Lots of nice intruments, huge variety of controls, and hardly ever crashes.
Roli free apps: Seaboard, and maybe NOISE. Great sounds, cool controls.
GeoShred: Great instruments, and the “gateway drug” to the non-recorded models of lots of powerful instruments.
There are a ton…You are in for a treat, IMHO.
Great! That’s encouraging. I have tons of apps too but I mostly feed them from MIDI generators. I’d like to get a little more “organic” for those tracks to go along with my truly organic instruments like ukulele and flutes.
The SWAM instruments for GeoShred have very nice reeds and strings! I particularly like the woodwinds; I play concertinas, and the reed instruments evoke their sounds, without “copying” them. And as a related benefit if you “play out” the Striso, iPad, small battery speaker, and power pack and cables all fit in a small bag and weigh under 5 pounds! And I imagine you know about using digital mixers (or whatever AUM and the like are called) allows you to “layer” multiple sounds to make new sounds at your whim. How many hours of fun does that provide?