Search "how long have we been together calculator" and most results are web pages designed to funnel you into downloading an app — often with a "free trial" that becomes a subscription once it wants to remember your milestones for you.
Relationship calculator, live down to the second
Enter the date (and optionally the time) you first got together, and the counter ticks up in real time — years, months, days, hours, minutes, seconds — the same "how many days together" and "how many hours together" numbers people share to mark the moment, without waiting for a page refresh.
Days together calculator with an actual celebration
None of the web-based versions we checked showed any kind of celebratory animation when you hit a milestone — just a number sitting on the page. Ours pops a fireworks show automatically the moment your time together crosses a 1-through-10-year anniversary, and the fireworks get bigger — more bursts, more colors — the longer you've been together.
100 days anniversary calculator
Baek-il (백일), the 100-day mark, is a well-known milestone in Korean dating culture — treated as the unofficial graduation of a new relationship. This calculator's "total days" counter makes that (and the 200-day, 1,000-day marks that follow) easy to watch for, even though the fireworks feature itself is tuned to the 1-10 year anniversaries.
Relationship day counter, no signup required
Everything runs in your browser — no account, no app download, no subscription. Nothing you enter is saved to a server unless you use the share buttons yourself.
