Mobile app beta testing service TestFlight is seeing steady growth, with considerable progress being made during the last 90 days in terms of new apps uploaded to its platform. TestFlight, which is now owned by Burstly, has now seen 400,000 apps in total added to its service, which represents nearly half of the current number of active apps on the iTunes Store, for a sense of perspective. Over 150,000 of those came in the last three months.