GroupM, Optimystix launch digital video-led brand solutions firm MashUpPaytm app crosses 1M downloads in 4 months; revamps and adds bus ticketing option tooNetwork18’s digital content & e-com revenues slip 7.7% QoQ; HomeShop18 revenues up 250%, BookMyShow up 75% YoYGSF India-backed Biosense launches uCheck app which enables urine analysis using smartphonesMobiTatva offers ‘fun learning’ app CramBuddy; can it engage teens?