You may have noticed that over the last several Salesforce Tech Updates that we have shared with you that Salesforce has announced the end of life for their Salesforce Classic Mobile App.
Please be aware that there is a new update.
With the imminent release of Apple's new iOS 11, the Salesforce Classic Mobile App will no longer be available from the App Store nor will the App work on any devises running iOS 11.
Salesforce recommends that if you are still using this App, that you move to Salesforce1 which is now the new Salesforce Mobile App supported by Salesforce.
There are no plans to try and address anything around the Classic Mobile App on iOS.
Please refer to this Knowledge Article.