No iPhone app that I am aware of but there is an online tool

http://mw-deck-builder.herokuapp.com

and cardgamedb.com is adding support for Mage Wars to their site.

Sorry I missed this all.

Rulebook 2 page 43
Ranged +X
This creature gains + X attack dice when it makes a ranged attack. If the attack makes multiple attacks against the same or different objects, it gains this bonus only for the first attack it can make with this bonus. Has no effect on zone attacks. Does not grant a ranged attack if this creature does not have one.

Ranged Attack
This attack can be used on targets within its minimum and maximum range, and within Line of Sight. A
ranged attack can always be made against a Flying creature in the same zone, even below its minimum range. Ranged attacks do not trigger damage barriers or counterstrikes. Ranged attacks ignore guards, and do not remove guard markers from guarding creatures.

Rulebook 2 page 22
The Attack Bar
Every creature or spell that can make an attack has one or more attack bars listed on its card. The attack bar shows all the information you need to resolve the attack:

Attack Name:
This is the name of the attack.
Action Required:
This icon shows which type of action you must spend to make the attack (quick action or full action).
• Attack Type:
This icon shows the type of attack, such as whether it is a melee or ranged attack. Ranged attacks will also show the range (minimum and maximum range).

So yes Hawkeye and the rings add to attack spells.