About Us


We started with a vision to make QLIPP something that could help all tennis players play better. After 2 years of testing and R&D, we’re sure that QLIPP can fulfill our goal and we’re excited that your help can bring us one step closer. The QLIPP team is part of 9 Degrees Freedom, a company founded in February 2012 by Donny Soh and Cen Lee, a pair of entrepreneurs with a passion in innovative lifestyle sports technologies. 9 Degrees Freedom is incubated by NTUitive, a startup accelerator from NTU.

What you see today is the result of more than two years of Research and Development. A lot of effort, resources and promises have been poured into this and we are truly happy and excited to be able to have the opportunity to present to you and the tennis community, the QLIPP sensor.

You can be well assured that we are fully committed to delivering your QLIPP sensor. Since 2013, we have started prototyping with our manufacturer just to ensure that you will be able to receive a product of utmost quality. We take a lot of pride in our work and your satisfaction will be our utmost reward.