Launching an app and getting it into a decent spot in the App Store is tough work. Maintaining that spot is even tougher. Should you launch on a Monday – or what about a Thursday? While it might sound trivial, according to David Wolinsky of NBC, there is an actual day that’s best to launch your app:

“In 2011, Mobilewalla found that: Even if Sunday was not always the developers’ chosen launch day, Mobilewalla found that apps released then statistically performed the best… That is, they made it into the list of the top 240 mobile applications. In this case, Mobilewalls is defining the ‘top 240’ apps as those that achieve the highest ranking in their respective stores. 42 percent of the iOS apps released on a Sunday made it into the top 240, while 11 percent of Android apps did the same.”

Despite the day that you launch, your mobile app will only do well on these “statically high performing days” if your app is of good quality. Users won’t use and rate your app well if you don’t have a bug-free seamless UI, fast load times, and an engaging concept for your app .

The article also stresses that maintaining and updating your app is vital to continued app success. While this is true, you want to launch your app well the first time. You shouldn’t require an update immediately after launch – because that would indicate that you did not thoroughly put your app through enough test cycles. At the same time, apps can always be improved. Testing before launch, and then continuing the testing post-launch to find any room for growth can keep your app successful.

Looking for some mobile app testing best practices? Check out these whitepapers on testing for iOS and Android apps.