Review on Rotatable Touch Screen Pen Disc Stylus for Touch Screens - Granarbol Universal Stylus for iPad, iPhone, Tablets, Samsung, Kindle & All Touch Devices - Includes 3 Replacement Tips by Austin Hearshman

Just received this item for my S21 Ultra and I'm happy to say it's beyond perfect. It doesn't require any adjustments or tricks, it works as soon as you take it out of the box. The sensitivity is excellent. It takes a second to figure out the best way to attach the pen tip to the phone due to the round disc at the end. However, it did not affect my experience in any way. The product even comes standard with 4 spare pen nibs included in the box, which was a welcome sight. If you're comparing this item to others on the market, including a Samsung-made phone device (which can cost you close to $50 or more with a case), it's not a problem. Priced at only around $9, this pen feels extremely durable, is a good weight, and has a very professional design. Highly recommend for anyone who wants a good stylus without having to shell out a bundle of money.