Sadly, this is not compatible with iPas (yet).
The layout of the pictures are boring and it is not possible to highlight one photo in the day.
The other problem, is that if you delete the original photo in your iPhone, the one in momento also disappear.
So for now, it’s useless, but promising if the app developer work on it.
AlfaJoy about Momento: Private Journal Diary, v3.0.1