The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Happened as dated, per wpcentral.com: "Your membership journey starts here. Keep exploring and earning more as a member. La…"
All About Windows Phone's own article (published 2 May 2014) confirms the Wellograph smartwatch's full Windows Phone compatibility and a July 2014 ship date - consistent with the pin's stored late-July/early-August 2014 window, again as an advance announcement predating the ship date.[1]
Yahoo Finance's syndicated announcement (published 1 May 2014) confirms Wellograph's Windows Phone 8.1 app and states the watch would ship in July 2014 - aligning with the pin's stored 30 July-1 August 2014 window, though the article itself predates that date by about three months as an advance announcement.
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.