Designer Creates Pocket-Sized Stylus Tailored for iPhone Duo's Compact Form Factor

Designer Eslam Mohammed developed the Pencil Duo, a stylus specifically engineered for the iPhone Duo that addresses the incompatibility between Apple's standard stylus and the foldable phone's compact dimensions. The Pencil Duo features a cylindrical design with a silver accent echoing the iPhone Duo's hinge, along with a functional button comparable to Samsung's S-Pen capabilities. Unlike the standard Apple Pencil, this device was designed from the ground up to pair practically with the smaller device without compromising either the phone's ability to fold or the stylus's portability.

Apple's decision to eventually support stylus functionality on the iPhone Duo represents a notable shift in the company's approach to foldable devices, though the implementation faced a significant practical hurdle. The standard Apple Pencil's dimensions—measuring nearly 6.5 inches—exceed the phone's 4.64-inch height by almost two inches, creating an awkward pairing that undermines portability and everyday usability despite technical compatibility.

Mohammed's Pencil Duo concept addresses this mismatch through thoughtful engineering tailored to the device's physical constraints. By reducing the stylus length to approximately 4.3 inches and designing it to dock within the phone's camera bump cavity, the prototype demonstrates how form factor considerations can drive specialized accessory development. The addition of functional features like haptic feedback and a multi-purpose button reflects capabilities found in competing stylus systems like Samsung's S-Pen.