Can I update iOS 9 for iPad 2?

iPad 2 can easily be updated to iOS 9 using the download and in-stall instructions available on the Apple Support site. However, make sure you have a backup on your computer through iCloud or iTunes as it is very difficult to start from a scratch. iOS 9 on iPad 2 is so varied from iPad Air 2 that they could be two very different machines.
The important point to remember is that they are indeed separate. iPad 2 has been missing features for many years because of hardware limitations. It does not have Siri, AirDrop or HandOff. However, iOS 9 can easily remedy that. From Apple Pay to Touch, there are many features missing in iPad 2. iOS 9 can make up for this inadequacy.
iPad 2 has the distinction of being the last supported iDevice announced by Steve Jobs. How well does it run? Very, is the expert verdict! iOS 9 adds quite a few items on the list of things if you are not caught up with iPad 2. It showcases a slew of features available on iPad 2 such as Touch ID and Apple Health as well as Split View and Slide Over. iOS 9 may not look good on the non-retina screen and this is because of its thin fonts and light lines.
iOS 8 packed a punch for iPad 2 as well as other smart devices such as iPhone 4S. The same cannot be said for iOS 9 necessarily. However some experts opine that the speed difference between the two is negligible. Using the iPad 2 with iOS 9 is very similar to iOS 8, so you don’t gain much by upgrading. If you have stuck with iOS 7 hoping for homilies and cheers when iOS 9 was going to be released, you will be sorely disappointed, because annoyances of iPad 2 remain in place. The keyboard needs time to process input and iOS 9 mostly stays on the level or adds just a little bit more to your iPad 2. Make sure you consider this, before upgrading.
iOS 9 has many benefits for iPad 2. It also has many drawbacks for this particular iPad. But compared to iPad 1, iPad 2 has not fared worse when it comes to iOS 9. Therefore, choose wisely if you must but updating to iOS 9 is not the worst thing to do, if you have an iPad 2!