One of the most popular fitness apps on Google Play has long been MyFitnessPal. This was true in spite of how it looked – the app's UI was absolutely awful, and performance left a lot to be desired. But no more. MyFitnessPal has gotten a new Holo interface in the most recent update.
The developers of MyFitnessPal completely redesigned the app. Performance is considerably better, and you could legitimately call the design Holo (#YOLO).