I have used 3 different stylus on my iPhone and iPad so far.
I use every day browsing and for taking notes Inland Stylus Pen. For drawings and editing photos Wacom. Pogo stylus is just easy to carry around with iPhone, not as good as Wacom for drawing.
Wacom CS100 Bamboo Stylus Black Pen ( iPad )
Elegant, high end design
Milled brushed aluminum
Unique smooth pen to paper feel
25% smaller tip vs. competitor models
Ergonomic design with optimal in-hand weight and balance
Durable non-scratch rubber tip
From the leaders in digital pen technology
Replaceable rubber tips
Dimensions: 4.7 x 0.4 x 0.4 inches ; 0.2 ounces
Pogo Sketch Stylus for iPad, iPhone, and iPod touch (Silver)
High-gloss curved pocket clip keeps the stylus handy
Works with any combination of gloves and nails
Allows you to use your touchscreen device or multi-touch trackpad at a natural drawing angle
Typing on a software keyboard (especially at first) is much easier with a stylus
Sleek aluminum design with detailed graphics
Dimensions: 0.2 x 0.4 x 4.8 inches
Inland Stylus Pen for ipad, iphone, ipod touch – Silver
Rubber tipped Stylus functions even more accurately than a finger on a touchscreen device.
Standard ball point pen with black ink.
Dimensions: 5.5” x .25”