How to ask her out for coffee after app small talk

The ask depends on how she's been replying lately, not how long you've been talking. If her last few messages are longer than yours, with questions and details, she's invested and a direct ask will land well. If she's been giving one-line answers and letting the thread sit for a day, she may be busy, or she may be waiting to see if you're going to push. In that case a lighter ask with an easy out works better than a big one.

Also look at what she's been volunteering. People tend to mention the places they actually go, the cafe near the office, the park they walk through. Those are better hooks than anything you could invent. If she's mentioned nothing local at all, that's information too, and you can ask in a way that doesn't require her to have a neighborhood at all, like suggesting a single named place near one of you.

A coffee ask works because it has a low cost. Thirty to forty-five minutes, daytime, somewhere easy to leave. Name the place and a rough time window, something like a weekday lunch or a Saturday morning. Don't pick an exact time to the minute unless she's already said which days suit her, because that can feel like you're booking her in rather than inviting her.

The invitation should read as a plan, not a request for permission. Say what you'd like to do and leave a little room for her to adjust it, like whether that day works or whether another time is better for her. This keeps her in control without you apologising for asking. Avoid tacking on reasons you might be rejected, and don't pre-explain why you're asking.

Send the ask in the afternoon or early evening, when you're both likely to be reading the app, not late at night when it looks like you're making a move. Give her a day or so to respond. If she says yes or suggests a time, confirm it in one message and stop. If she gives a vague reply like "maybe, let me check my week", answer it with a single short line that gives her an easy closing point, then wait.

If there's no reply at all after about two days, send one light follow-up that references the place or the topic rather than asking again. Something that makes replying easy even if the answer is no. If that also goes unanswered, stop. Two unanswered asks is the signal, and pushing a third time turns a pleasant match into something she'll want to report or ignore.