Get started How do I download it onto my iPad and iphone

If you want to download iOS 10.0 onto iPad, you can follow below steps to do that.

1. Install the latest version of iTunes on your computer.
2. Connect your iPhone to your computer via the USB cable.
3. Open iTunes and select your device.
4. Click "Summary > Check for Update".
5. Once iTunes detects the available update, click "Download and Update".
6. If asked, enter your passcode. Then iTunes would start to update iPhone iOS software. When it's finished, disconnect your iPhone with computer.

For more methods, check: How to Update iPad iOS

You can install My Contacts Backup app on your iPhone. This app can help you transfer iPhone contacts to Android tablet, it has a free version and pro version. My Contacts Backup allows you to email the contacts in your iPhone to yourself, and restore contacts from the backup files. After emailing the contacts to yourself, you are able to download the contacts on your Lenovo Tab 2. The contacts in this app will be sent as vCard files, so you don't have to worry about the incompatibility on your Android tablet.

Of course, here are some other methods to help you transfer contacts from iOS devices to android devices.
How to Transfer Contacts from iPhone to Android Phone

You will need to download the Kindle app ( from the App Store ) on your iPad or iPhone. You can then access your account on Amazon and probably download whatever you have on the Kindle to those devices. I have it and it works great....never went back to the Fire.

Ok, so go onto the App Store,and go onto to purchased ( assuming your on the same account) then find the app, and click the little cloud next to it, and it will start downloading, hope this helped :)

Go to app store and download or go to ITunes and adjust your account so that any app will download to both IPads and/or IPhone at the same time.

All you need to do is download WWF onto your iPad from the App Store.

You can use the third-party iPad transfer software to transfer all videos and photos from iPhone to iPad. Leawo iTransfer provides much help at this moment. This software is used for transferring files among iOS devices, iTunes and computers, and it enables users to transfer videos from iPhone to iPad Pro directly without using iTunes. The following guidance will show you how to do that, and you can free download the software to have a try. Download Leawo iTransfer ' Leawo iTransfer for Mac and install it.
Step 1. Run Leawo iTransfer and connect both iPhone and iPad to computer with USB.
Step 2. Click the name of iPhone and choose Camera in the left sidebar. The contents show up in the right part.
Step 3. Select the videos you want to transfer and click the transfer button at the right bottom. Or right-click the selected files and choose Transfer to > iPad Pro.
Step 4. Check Transfer to list in the pop-up dialog and choose iPad Pro as target. Then click Transfer Now. The software will start transferring videos from iPhone to iPad.

For more detail, check: How Can I Transfer Videos from iPhone to iPad

I don't know about Yahoo messenger, but you can certainly download Skype onto your iPad. Search for 'Skype' in the App Store, and you'll be able to download it free. There is no iPad specific version of Skype, but the iPhone one runs and works fine.
As for Yahoo messenger - do the same thing, run a search in the App Store to see if you can get it for iPad. If not, see if you can do it via the web - Safari on iPad is a very capable browser, much more so than Internet Explorer, at least.
Hope that helps!