“Download an older version of ‘Messenger’? The current version requires iOS 12.0, but you can download the last compatible version for iOS 9.3.5.”

Mrs. Kwan laughed. “To talk to my granddaughter in Seoul? Every day until my iPad died last year. Why?”

Eloise opened the App Store. A spinning wheel. Then, an error: “This app requires iOS 10.0 or later.”