Salesforce1 Mobile App Vs Customized Salesforce Mobile app

Using Salesforce 1 mobile app, users can create a record, read, update a record and delete records, access Visualforce pages and components. In the case of Customized Salesforce mobile app, admins can customize their Lightning record pages as per their mobile business needs (such as a map that shows the location of accounts for sales reps), can create custom record pages, record type, and profile.