Student or Learner
Do you say 'He's on time' or 'He's in time'? or both?
on time : something happens at the time it should happen.
The express train left on time. It was supposed to leave at 1400 and it did.
in time : some thing happens at the last possible moment before it is too late
I got to the station 10 minutes late. Luckily, the 1400 express train to Hull hadn't left on time so I was in time to catch it.
in time is often used with just to add emphasis
I arrived at the station just in time to catch the train.
I hope this helps.