Complex sentence: Crowdfunding-backed start-up Pebble reinvented the smartwatch in 2013, with a campaign running on Kickstarter that raised more than $10m in funding, and at the end of 2014, Pebble announced it had sold a million devices.
Split into simpler sentences: Crowdfunding-backed start-up Pebble reinvented the smartwatch in 2013, with a campaign running on Kickstarter that raised more than $10m in funding. At the end of 2014, Pebble announced it had sold a million devices.