A Texas teen couldn’t speak with his sister, so he created an app to give her a voice No Comments Uncategorized Archer Calder spent his childhood unable to talk with his younger sister, Della, his only sibling. Archer Calder spent his childhood unable to talk with his younger sister, Della, his only sibling. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to print (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on WhatsApp (Opens in new window)