how can i update my ipad 2 to the latest ios *** i cant get some apps

Hello,

This iPad model cannot be updated any further.

iPad2 cannot be updated beyond iOS 9.3.5 (WiFi Only models) or iOS 9.3.6 (WiFi & Cellular).

Apple ended update support for iPad2 in September 2016. It cannot be updated to iOS 10 or later versions, as the internal hardware does not meet the minimum technical requirements for new versions of iOS/iPadOS. The 32-bit architecture ipon which it is built is effectively obsolete.

Many App Developers have also dropped support for older devices and iOS versions preceding iOS11/12/13 - and have withdrawn older versions of their Apps from the Apple App Store, now limiting utility and usefulness of older devices. 

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 iPad7 model supports current iPadOS 13.x - and has hardware specifications and capabilities that will vastly outperform your old iPad2.

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

You don't.

These old 8 and 9-year old iPads are too old and soon to be rendered obsolete by the end of 2020.

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

Tap and 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

Sorry & Best of Luck to You!