The main function of a gallery application is only to see photo collection and also watch videos. Android is also equipped such a feature as default. But, it is okay if you want to improve your gallery feature in order to make it easier on your eyes and also to make it more cool.
Piktures, this application is a new comer among video and photo managing applications. However, do not underestimate it since it is definitely sophisticated and in fact more up-to-date than the predecessor. It is understandable since the developer must learn much from the existed ones before developing.