May i ask how much you paid for the nano ledger s when they had the black friday discount?
The Black Friday discount in 2019 was 30%. In 2018 it was 50%. There is currently a Valetine's deal on for both a Nano X and a Nano S for $119.
So if you are a frequent traveler, go with the X? But by that, what is meant by it? Like using it in public etc?
The Nano X model has Bluetooth capabilities, so it is easier and more convenient to use on the go with a smartphone.
Because you can't send btc with your nano ledger s unless you have it connected to a computer only right? Or you could actually connect it to your iphone and that would work as well?
The Nano S is compatible with Android phones via an OTG cable, but iOS won't let the Nano S connect to Apple devices. If you own an iPhone, and would like to pair your hardware wallet with your phone rather than with your laptop, then you will need the Nano X model.
Is there a reason its a range of 6 to 10? Do some apps use more which is why?
Yes. Some apps require more space than others. It also depends on which combination of apps you install. Forks of BTC such as LTC and BCH use much of the same code that bitcoin does, and so those sections do not need to be installed twice.