update my ipad 4th generation?

A 4th gen iPad cannot be upgraded beyond iOS 10.3.3/10.3.4 for WiFi & cellular data models.

A 4th gen iPad is a very NEARLY 8-year old device, now!

These older iPad models are too old, now, too underpowered and completely incompatible with any of the current and future versions of iOS/iPadOS.

Sorry, but it is what it is, today, in the year 2020!

Your iPad is too old and soon going to be OBSOLETED by the end of 2020!

Here's why and what you will need to do about it in 2020!

Tap and thoroughly read my link below for my additional info about your old iPad model.

If you own OLD 8 and 9 Year Old iPad mo… - Apple Community

Now is the time seriously consider a new, new refurbished or much, MUCH “newer”, used iPad model!

A lot has happened with iPad and iOS in nearly 8 years and in nearly 3 years since the last major version of iOS 10.

Sorry & Best of Luck to You!

Sorry, no...

Update support for iPad4 ended September 2017. The final iOS releases for this model were iOS 10.3.3 (WiFi Only models) and iOS 10.3.4 (WiFi & Cellular). iPad4 cannot be updated to any later major version of iOS as it lacks the minimum hardware requirements needed to run more recent versions. The 32-bit architecture upon which it is based is effectively obsolete - more recent versions of iOS being designed for 64-bit system hardware.

Many App Developers have also dropped support for older devices and iOS versions preceding iOS11/12/13 - and have withdrawn older versions of their Apps from the Apple App Store. Withdrawal of Apps supporting older models of iPad is making their utility and usefulness significantly more limited. Once compatible versions Apps are withdrawn, you’ll not be able (re)download or (re)install them.

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. Of current models, even the entry-level iPad7 supports current iPadOS 13.x and the soon to be released iPadOS14 - and has hardware specifications and capabilities that will vastly outperform your old iPad4.

I hope this information is helpful - if only in clearly stating the limitations your current iPad4 and your potential options.

An iPad 4th generation can be upgraded to iOS 10.

It can not run iOS 11, 12 or 13.

Thanks