Warning: the app is nice, but its BIG. It may take up a bit of memory on your phone. So, if you like the idea of an app, but don't need the full reporting function of the full website, try the Clinicalkey app. ClinicalKey is owned by the same company and allows you to access the Clinical Pharmacology monographs as well.
But if you want the standalone app for this pharmacology database:
Step 1: first register for a personal account using your DMU email. If you have already created a personal account in another Elsevier product, like ClinicalKey, then you do not need to register for an account again. You will receive an email from Elsevier to validate your email.
Step 2: Locate the Clinical Pharmacology app in your app store. Download the app. Log in using the credentials you just established online.