Nice write up!
I used RoR and Turbo Native for both iOS and Android apps last summer on a client project. To do that I used Jumpstart Pro’s iOS and Android add-ons [1]which Joe (the author) contributed to.
As a non-mobile dev they were an absolute dream to use. I was VERY pleasantly surprised how easy it was to get our apps out the door. Even though it was 10/10 would use again I would’ve loved this write up last year as seeing more how-to examples in the wild is always helpful.