I've watched two more time travel movies this week-
24 (no relation at all to the US TV series)
This was a pretty silly movie, with the story of a scientist who creates a time machine watch but his evil twin brother tries to steal it, killing the scientist and his wife, but their baby and the time machine (locked in a box) are given to a random woman before that happens, and the evil brother ends up in a coma for 26 years after being fooled into thinking there was a bomb and jumping off a bridge.
In those 26 years the boy grows up to be a watch repair guy, and by some incredibly dumb coincidence of events, the key for the locked time machine box makes its way from the evil brother (who is still holding the key in his hand after 26 years somehow) to the son, who still has the box and manages to open it to find the time machine watch. Then he proceeds to use it to manipulate a girl into liking him.
Then the evil brother comes out of his coma and manages to find the son and the watch, and there's lots of time travel shenanigans and everything sorta works out. But not before every single main character gets killed at some point.
Synchronicity
This movie was much better. It appeared to be a pretty typical causality loop setup, but was a bit different and confusing due to the way it was edited, and I had to pause a few times to figure out who was who and when. It ended up pretty good in the end.