Ipad model MD328KN/A

I believe that is an iPad 3 which maxes out with iOS 9 or 10, can’t recall exactly which one.

The current iOS is 13 so it can be very hard to find older apps that are compatible with devices that old.

Look in the settings, general on your device and find what iOS version it is running. Then when you are searching the App Store look for apps that are compatible with that iOS version. You likely will find very few. Unfortunately many app developers don’t keep their apps compatible for devices that old (your iOS hasn’t been the standard for 3-4 years and it simply costs the developer too much to keep backwards compatibility that far back)

iPad 2,3, 4, 1st gen iPad Mini models are nearing 7, 8 or 9-years old, now.

As of the beginning of 2019, many, MANY third party app developers are all more quickly and completely dropping older app support for all old 7, 8 and 9-year iPads that are running 2-3 year old and earlier iOS versions.

Third party app developers are removing all of their older, legacy versions of their apps from Apple's App Store servers, now.

Older versions of apps are going to be gone for good, now!

Getting older versions of app for these old iPad models, initially from Apple’s iOS App Store is getting to be very difficult and problematic, now, and will only be getting much worse in the year 2020.

These old iPads are now reaching their complete end of life and support.

Old iPad that can no longer be upgraded/updated, then will have NO MORE APPS AVAILABLE for initial download, at all, soon, from the Apple iOS App Store, for such old iOS devices in the very near future.

Older versions of apps for older iPads will be completely gone, very soon!

Time to now seriously consider a new or discounted, refurbished iPad from Apple.

Sorry & Best of Luck to You!