Nurse_bigdog/All, I have good news.  I'm in the exact same boat and I discovered there is a way to install the latest compatible app version. I used this method and it worked perfectly for my iPhone 4S running iOS 9.3.6 Apple Community: Redownload apps and games from Apple  Excerpt from that site: Redownload apps and games from Apple You can redownload apps in the App Store. How to redownload apps on an iPhone, iPad, or iPod touch: Open the App Store app. Tap the sign-in button  or your photo at the top of the screen. Tap Purchased. If you use Family Sharing, tap My Purchases or choose a family member’s name to see content that they purchased. Tap "Not on this [device]." Find the app that you want to download, then tap the download button  . ... View more