The 'Spike' keyboard has already garnered donations of almost $50,000 (£32,300) on the crowd sourcing website, and requires another $27,000 (£17,400) to get it off the ground.
The accessory is attached to a tailored case designed to fit Apple handsets, and works by applying force to the device's touch-screen keypad beneath. It can be tucked away at the rear of the phone when not in use.
Requiring no power source or bluetooth connectivity, the product scooped a 'Top 3 Most Innovative Products' Award at the Consumer Electronics Association Show in New York last month.
The keyboard will be available in three different models - Spike1, Spike2 and Spike3. The entry level edition was designed with value for money in mind, while the mid-range case offers industrial strength protection. The Spike3 is a limited edition model rendered in aluminium.
Kickstarter, which has helped raise millions of dollars for new ventures in the US, was launched in Britain earlier this week.
Donations towards the 'Spike' keyboard can be made via its Kickstarter page.