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Gruff is a British inventor, tech entrepreneur, physicist and author. In 2019, he was named one of the World's Top 50 Innovators by Codex who invited him to give a talk at the Royal Society, London. In 2018, Gruff and Kwiziq co-founder Simon won the BMWi UK EdTech Founder of the Year award.

Between March and June 2020, and part-time thereafter, he took an unplanned sabattical to work pro bono as a coronavirus research scientist.

Gruff is known as a pioneer in the fields of Exergaming and the use of AI in education. His first venture, Exertris, was the world's first interactive gaming exercise bike, predating Nintendo's Wii Fit by seven years. Bill Gates introduced the bike in his keynote speech at CES 2003 describing it as "really quite amazing", and Gruff and the product appeared twice on BBC Tomorrow's World. The British goverment recognised Kwiziq as a leading AI startup in their AI Policy Paper. Kwiziq has also been a top 3 finalist in CogX’s Best AI Product in Education Award in 2017, 2018 & 2019.

In his ‘spare time’ Gruff writes fiction and non-fiction. His debut novel, "The Looking Glass Club", reached #1 on Amazon (SF> Mysteries and Crime), and was even read by Amazon’s CTO, Wernel Vogels. The novel is set at Imperial College, London, where Gruff studied Physics (BSc) and Medical Physics (PhD).

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