period tools

Period tracker for teens

A free, simple period tracker made for new and still-settling cycles — no app to download, no account to create, and nothing stored online. A teen or tween just taps the days of their period and the calendar learns their pattern. Because everything stays on their own device, it’s private by default — which is exactly what most parents are looking for.

Start tracking — free, no sign-up

Works on any phone browser. Nothing is saved online or shared with anyone.

Open the free tracker

Why tracking helps when periods are new

The first couple of years of periods can feel unpredictable, and that’s completely normal. Tracking turns that uncertainty into something you can actually see. With just a few months logged, a teen can start to learn roughly when their next period is due, notice what their own “normal” looks like, and feel a lot less caught off guard. It also makes a future doctor’s visit easier — real dates beat trying to remember “maybe a few weeks ago?”

  • Get a heads-up before the next period so it’s never a surprise at school
  • See whether cycles are settling into a pattern yet
  • Have real dates and symptoms to share with a parent or doctor if needed
  • Learn what’s normal for their body, not a textbook average

What’s normal for a teen’s cycle

A first period usually shows up around age 12, though anywhere from about 8 to 15 is normal. After that, expect things to be uneven for a while:

  • Cycle length varies — often 21 to 45 days in the early years, and it can change month to month.
  • Periods can skip — missing a month or two is common before cycles regulate, which can take up to about three years.
  • Bleeding lasts a few days — usually two to seven.

See our normal cycle length guide and irregular periods for the full picture — including the few signs that are worth a doctor’s visit.

How to start (it takes a minute)

  1. Open the free tracker on a phone or laptop — no app, no sign-up.
  2. Tap each day of the period on the calendar.
  3. After a couple of cycles, it works out a personal average and predicts the next period, so there’s a heads-up instead of a surprise.

For parents: why this one

If you’ve looked at period apps for your kid, you’ve probably noticed most want an account, an email, and a lot of permissions — and many make money from the data they collect. This is the opposite. There’s nothing to install and no account to make; your teen’s log lives only in their browser, on their device, and is never sent to us or anyone else. There’s no profile to build, nothing to leak, and nothing to sell. It’s a calm, private place for them to learn their own body — and you can read exactly how the privacy works on our period tracker privacy page.

Frequently asked questions

What age do periods usually start?
Most people get their first period (called menarche) around age 12, but anywhere from about 8 to 15 is normal. It often arrives a couple of years after breasts start developing. If there's no period by age 15, or no signs of puberty by 13, it's worth checking in with a doctor — not because something is wrong, but to be sure.
Are irregular periods normal for teens?
Yes, very. For the first 1–3 years after periods begin, cycles are often irregular — they can come anywhere from about 21 to 45 days apart, vary month to month, or skip entirely. The body is still settling into its rhythm. That's exactly why tracking helps: it shows the pattern as it develops instead of leaving you guessing.
Does my teen need an account to use this tracker?
No. There's no sign-up, no email, and no app to install. It works in any phone or laptop browser — they just tap the days of their period. That makes it quick to start and easy to keep private.
Is it private and safe for a teenager?
Yes — that's the whole point. Everything your teen logs stays in their own browser on their own device. Nothing is sent to us or to anyone else, there's no account to be hacked, and we don't collect or sell any data. Unlike many period apps, there's no profile being built. (More on how that works on our period tracker privacy page.)
When should a teen see a doctor about their period?
Reassurance first: new periods are usually irregular and that's normal. But it's worth seeing a doctor if there's been no period by age 15, periods are more than about 90 days apart after the first year or two, bleeding is very heavy (soaking through a pad or tampon every hour), there's severe pain that stops normal activities, or bleeding happens between periods. Keeping a simple log makes that conversation much easier.

Related

— The Period Tools Team