None.
No Pencils work with any old/er 6-10-year old iPad models, as well as the 2017, iPad 5th generation.
These old/er iPad models lack the crucial and necessary internal screen hardware layer needed for an Pencil to be recognised by an iPad's screen and to properly function/interact with an iPad’s screen.
If you are looking for similar Pencil functionality, the ONLY third party, smart Bluetooth stylus that I can, honestly, recommend that actually works well with any older iPad, that is NOT compatible with any Pencils, is the Adonit Pixel smart Bluetooth stylus.
https://www.adonit.net/jot/pixel/
This smart, Bluetooth stylus works across a wide range of iOS devices.
The Bluetooth connection is stable and its Bluetooth pressure sensing technology is very smooth, natural feeling and has consistent line drawing ability.
Plus it's a quality made, aluminum stylus with two programmable buttons.
I had been using this stylus for well over 3 years now and it is/was really good on my iPad Pro.
This stylus worked wonderfully for me with all compatible apps.
The Adonit Pixel works with iPads all the way back to the 2012, 1st gen iPad Mini and iPad 4th generation!
Has ON/OFF/app shortcut buttons.
Has a nice fine, textured pen tip AND a nice rubber grip.
Magnetically charges on its own magnetic charging adapterand has an auto 15 minute shutdown feature ( to preserve battery life ), charges in a hour, or so.
Has both a small USB charger that that plugs into any USB charging block OR you can purchase an optional charging dock.
I find it only lasts for anywhere between 9-12 hours, but Adonit claims up to 16 hours of continuous use on a single charge cycle.
Made of very high quality aluminum materials.
The Adonit Pixel ONLY works with approx. 24 of the major/popular drawing/sketching/painting apps (the Pixel works with, but currently no longer “officially” supported with Procreate, but it still works and works pretty well in Procreate ), and approx. half dozen of the popular note taking apps, a half dozen writing apps and about a half dozen PDF style/compatible apps.
You WILL have to perform some pairing and setup parameters in each of the Adonit Pixel compatible apps.
You just DO NOT simply turn on Bluetooth on an iDevice and turn on the Adonit stylus and start writing.
The Adonit Pixel stylus is NOT an Pencil in this regard/respect.
You have to initially Bluetooth pair the Adonit Pixel, setup the hand/palm position and in many apps, set up the stylus screen pressure sensitivity for each and every compatible app!
Once you have, initially, done all of this, all Adonit Pixel compatible apps will remember these settings for future use!
Some Adonit Pixel users claimed their stylus doesn’t work, but it does work well IF you properly know how to set up the Adonit Pixel!
If interested, to make sure you get the latest installed stylus firmware, you must order the Adonit Pixel stylus directly from the Adonit website, when possible and available.
This stylus has just become available, once again, after about year of absence from availability from Adonit.
So, get this stylus while it is in stock and while supplies last.
