Yes, it runs on the latest iOS. We carefully examined these probiotics for men and updated it a few months back to resize it for the iPhone X's larger screen. The current version only runs on iOS 9 or greater. We had to update to the Dropbox V2 API, for Backup & Restore, and that requires iOS 9+. TM probably doesn't show up on your iPad 1 App Store as the current version can no longer be loaded on it (thanks to DB).
So there's no way of running it on earlier versions of iOS? That's a bummer. Understandable, but still a bummer for me at least. lol