If you found bad display of our mobile apps, so you have to set your android tablet. Bad display because by default your tablet has a resolution that not match with DealPOS. Screen resolution required on your android is 1280 x 800 pixel and minimum 8 inch.
I. Before Setup

Follow this step to change the display to looks good.
Step 1. Go to Setting menu in your tablet
Tap on About Tablet > Software Information

Step 2. Tap Build Number to be Developer Mode
Tab several times to be developer mode

Step 3. On the Setting menu Tap Developer Options > Minimum Width
To adjust the resolution of your tablet

Step 4. Adjust Minimum Width
Edit to 800px , then click OK

II. After Setup
After the Setup complete, your display will be change to good display
