Unable to redirect Salesforce links to Salesforce App
To open Salesforce links within Salesforce app, you should encode them following the correct scheme. 

A request to Salesforce for Android and iOS URL scheme follows this format:

&lt;scheme_name&gt;://sObject/&lt;id&gt;/&lt;action&gt;


Let’s break down each parameter of the URL scheme format:


scheme_name: Supported Salesforce for Android and iOS scheme names.
sObject: Indicates a single instance of a Salesforce object.
id: The unique single instance of a Salesforce object. id lengths of 15 and
18 characters are supported. 
action: Supported URL scheme operations


For example, to open Salesforce for Android and iOS and navigate to a specific record, the URL scheme will look similar to:

salesforce1://sObject/001D000000Jwj9v/view




Scheme Names

Salesforce supports the following scheme_name parameters for URL schemes:


salesforce1://




Actions

These are the available action parameters for URL schemes.


view: Navigates the user to the Salesforce app to view a record in detail. 
edit: Navigates the user to the edit detail page of a record.
home: Navigates the user to the home page of an object.
download: Download any version of a file.
follow: Follow users to see their posts, comments, and likes in your feed.


Note: The user must have proper permissions to view, edit, download, etc within Salesforce directly, so if it's not opening the correct section of the Salesforce app - first validate they have access to the actions you're attempting to bring them to - otherwise they usually end up on the home screen. 

Resource Links: 
https://resources.docs.salesforce.com/sfdc/pdf/salesforce1_url_schemes.pdf 
https://success.salesforce.com/answers?id=9063A000000l3wlQAA