Shumel has been working in app marketing since 2015, starting out agency-side at Fetch and later at M+C Saatchi Performance. He went on to found his first startup, Appsumer, which focused on solving ...

David is a freelance writer and event host. He launched Mobile Marketing Magazine in November 2005 and edited it for 18 years before returning to a freelance career in December 2023. He was also the ...