how to upgrade version on ipad

Update support for yoir iPad4 (WiFi Only) formally ended September 2017. The final IOS release for this model was iOS 10.3.3; it cannot be updated to any later major version of iOS as it lacks the minimum hardware requirements needed to run more recent versions.

Many App Developers have also dropped support for older devices and iOS versions preceding iOS12 - and have withdrawn older versions of their Apps from the Apple App Store.

If Apps that you need to use now have higher minimum iOS-version requirements, your only option is to replace your iPad with newer model. Even the basic current iPad model supports current iPadOS 13.x - and has hardware specifications that will vastly outperform your old iPad4.

I hope this information is helpful - if only in clearly stating your current options.

That iPad model cannot be upgraded/updated past iOS 10.3. 3. The iPad 4th generation is ineligible and excluded from upgrading to iOS 11 or iOS 12 and any future iOS versions. With the introduction of iOS 11, All support for older 32 bit iDevices and any iOS 32 bit apps has ended

So, this is really now the time to seriously consider a new or discounted, refurbished iPad from Apple or other Apple authorised resellers or other trusted sources for new and older Apple products.

Sorry & Best of Luck to You!

Then your iPad is to old to run any newer version of iOS.

Your only option is buy a newer iPad.