Hey there, bford225!
Check out the Ink & Slide FAQ for info on what devices are compatible: https://helpx.adobe.com/ink-and-slide/help/ink-slide-faq.html
iPad 2 is not listed and you may face some compatibility issues. When picking your stylus, you can usually find hardware requirements on the product FAQ pages. Since the iPad 2 is a 'relatively' older device, bluetooth support may be hard to find for a stylus. Bluetooth is what will give you pressure sensitivity and palm rejection. I would recommend a Google search of "Bluetooth stylus for iPad 2".
Let me know if I can help with anything else!
what about iPhone 6. Will it work on that ? and or the jot pro pen ? Is that compatible with adorn draw and mobile apps?
okay I found out that the iPhone 6 64gb has Bluetooth of 4.2. What does adobe ink and slide need is it 4.0 . ? That's all I need to know