Is there is any app to count days?

Answer to this is Yes. There is one very useful app in play store where you could count days left and days since. App name is 'days count widget'. These app will allow you to create widget which will show days left and days since.

To download this:

Step 1: Open play store.

Step 2: Search for 'days count widget' app and download and install it.

Step 3: Open widget in mobile where you can see days left icon tap on it.

Step 4: After opening it, set the destination date .

Step 5: you can create as many number if widgets you want.

Below there is a pictures of app and steps to make widget.