If you usually do Clear cache only on the browser, you can also do it in Mobile Apps. You can clear the cache to reset previously configured settings or the username / password saved to the device. Clearing the cache might occasionally assist us in resolving minor issues that usually can happen. You can check the following steps to follow:
Step 1. Open Setting menu on your tablet
Pick Apps > DealPOS
Step 2. After That Click Force Stop And Open The Storage
Step 3. Clear Cache and Clear Data Apps, Relaunch Dealpos Apps.
You might also read this article:
If you're having trouble logging into mobile apps, take a look at this article: Authentication Error After Sign in.
If you'd like to try out the DealPOS mobile apps in beta version, follow the instructions outlined in this article: Installing Beta version From Play Store.