Whether a woman met you on a dating app or in real life, she still expects common dating etiquette.
Assuming that you haven’t messaged her at all letting her know you will be running late, most women are willing to forgive lateness, as long as it is within 15 minutes. They aren’t necessarily happy about it, but if you are apologetic about your lateness when you arrive and show her a fairly good time, she will most likely be open to going out on a second date with you.
Now, continuing with the same premise that you haven’t messaged her at all letting her know you will be running late, if you are a lot more than 15 minutes late, say, a half hour, most self-respecting women would have left the venue of the date by then. There is no chance that you will get another shot at a date with these women.
However, on the off chance she is there when you arrive a half hour late or so, there is actually still a chance that she will go on a second date with you. If she waited that long, she wasn’t willing to give up on you.
If you show her a REALLY good time, there is a higher likelihood that she will be willing to go on a second date with you. You will really have to turn on the charm and make her feel amazing at this date.
All of this being said, just don’t be late for dates. It starts you off on a bad footing and first impressions are hard to overcome.