Groupon's iOS app just scored a refresh this week, adding access to the firm's new Reserve discount reservations platform via a dedicated tab. Savored users should be familiar with the concept: secure a spot at hit restaurants just as you can on OpenTable, but Groupon's flavor packs a compelling value add. Instead of earning negligible points towards dining gift certificates, Savored (and now Groupon Reserve) members can snag discounts of up to 40 percent at sele
