In time VS On time

You should use “in time” when completing a task within an specified time frame or before a deadline is due to happen.
Examples:
I’d like to get there in time to see the fireworks show.
Our work won't be done in time to get off at a reasonable hour.
You’re just in time, and I was about to blow out my birthday candles.

You should use “on time” when you complete something on schedule or at an exact time predicted
Examples:
It's 3pm and look, there's the train. It's right on time.
Your delivery will be delivered on time, it won't be late, don't worry.

Common Mistakes:
❌ If I miss the bus I won't be to work in time.
✅ If I miss the bus I won't be to work on time.

❌ He's always late for work. He's never in time.
✅ He's always late for work. He's never on time.