HTC moves its clock app to the Google Play Store
The HTC clock app includes a timer, stopwatch, alarm and an world clock. It is a well-designed application and quite functional as well. What is odd is that the app is not compatible with some HTC One (M8) models, at least for now. Additionally, the app will also not work for the moment with the HTC One (M7).
As we pointed out on Wednesday, HTC is following Motorola and Sony in moving core apps to the Play Store. It is such a practical idea that we would be surprised if other manufacturers didn't follow suit. Considering the testing that some carriers put these updates through (Hello, Verizon!), downloading an app from the Google Play Store to update a core app, will always prove to be the fastest and most direct route to your phone or tablet.
source: HTCClock via AndroidPolice, AndroidandMe