Whites tree frog not growing

[Jimboa]

When I got this little guy last September, I think he was newly morphed. He is active every night and eats a couple of pin head crickets everyday. Calcium and vitamin once a week. It's been almost a year and he is only slightly bigger than the day I got him. He is otherwise quite healthy.
Makes me wonder if he is a whites.

I know it's a he because I've seen him chirping.

Just took this picture when I'm cleaning out his tank.


This was taken when I first got him.