Users who have the app installed on an iPad device can continue to use it, but if the app is deleted, it won’t be possible to reinstall it. And it won’t be possible to install the app on new iPad devices.
We are focusing our mobile development resources on the Salesforce1 mobile app. Salesforce1 is available for iPad devices and has similar functionality to the Mobile Dashboards for iPad app, in addition to other enhanced analytics features. With Salesforce1, users can view filtered and dynamic dashboards, drill down into reports, and share dashboard snapshots in feeds.