We restored, via iTunes, another iPad from a backup that had Haiku and ran into the same issue. Would not install. Thank goodness we have switched to Myro:Home which frankly is superior (and fully supported) IMHO. The Apple watch app integration is also really slick. Certainly one option for folks, but understand their is an ongoing cost. I’ve been burnt several times by one off apps that don’t have a subscription and eventually die because the business model to support these unique apps doesn’t work. SJ