There are a host of applications that can help businesses bridge the gap between exploding app use by their customers and their now inadequate systems for customer relationship management, writes Ankur Jain of Nexus Venture Partners. Flurry, for example, delivers basic CRM metrics. Urban Airship can help with push notifications. Crittercism goes beyond crash-and-bug reports to app performance management. And AppBoy's dashboard is useful for push notices and analytics. Finally, consider Helpshift "for in-app customer service, support, and marketing."