Does a first period tracker exist?

There isn’t a tool that can predict the exact date of a first period.

However, tweens and teens can track early puberty signs – like breast development, discharge, and mood changes – to understand when a first period may be approaching. 

Apps like luna help teens track puberty signs, prepare for when it begins, and learn more about a first period start date.

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Can you track a first period?

There’s no way to accurately predict the exact day a first period will start.

Period trackers rely on past cycles to estimate future ones, and before a first period, there is no cycle yet. 

Early hormonal changes are still settling, which makes timing unpredictable.

That said, you can track the signs that usually appear before a first period, which helps both parents and teens feel more prepared.

Once periods begin, cycle tracking becomes much more accurate. You can learn more about how tracking works here.

What are signs that a first period is coming?

Instead of tracking dates, a “first period tracker” can mean noting body changes down that often appear months or even years beforehand.

Common signs include:

• Breast development (often the earliest sign)
• Growth of pubic or underarm hair
• Clear or white vaginal discharge
• Mood changes or emotional sensitivity
• Body odour or mild acne

These signs usually begin one to two years before a first period, but everyone develops at their own pace.

Explore signs a first period is starting in more detail.

Is there a first period tracking app?

While there’s no app that can predict a first period, luna helps build confidence before periods begin.

Instead of focusing on dates, luna allows teens to:

• Learn what changes are normal during puberty
• Track symptoms like discharge, mood changes, and other changes
• Understand menstrual cycle phases before periods start
• Learn about what the common age is to start a period, and signs it’s started
• Feel prepared rather than caught off guard

Once periods begin, luna can then be used as a full period tracker.

If you’re choosing a tracker for this stage, these guides may help:

👉 Choosing a teen period tracker 

👉 Best period tracker for teenage girls 

👉 Period tracker safety guide

For parents: how does tracking help before a period?

Encouraging a tween or teen to track early signs can help parents:

• Know when to start conversations about periods
• Prepare a first-period kit for home or school
• Normalise changes and reduce anxiety
• Avoid surprises that feel stressful or embarrassing

For teens: why is tracking first period signs a good idea?

Knowing that changes like discharge or mood swings are part of normal development can make puberty feel less confusing and more manageable.

So…does a first period tracker exist?

There’s no tracker that can predict the exact date of a first period, and that’s okay!

A first period tracker is really about tracking signs, learning what’s normal, and feeling prepared.

Whether you’re a parent supporting your child, or a teen navigating these changes yourself, understanding the process makes the first period feel far less daunting.

And once periods do begin, tracking on the luna app becomes a powerful tool for confidence, planning, and wellbeing.

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FAQs about first period trackers

Does a first period tracker exist?

There isn’t a tracker that can predict the exact date of a first period.

Before periods start, there’s no cycle to measure yet.

However, you can track early puberty signs like discharge, breast development, and mood changes to feel more prepared. 

How can you track when a first period is coming?

Instead of tracking dates, it’s more helpful to track signs of puberty.

Common signs include breast development, pubic or underarm hair, and clear or white vaginal discharge.

These changes often begin one to two years before a first period.

Can period tracking apps predict a first period?

No period tracking app can accurately predict a first period.

Period trackers work by learning from past cycles, which don’t exist yet before menstruation begins.

Apps like luna focus on education, preparation, and tracking early signs instead.

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Is tracking helpful before a first period starts?

Yes. Tracking early signs can help teens understand what’s normal for their body and help parents know when to start conversations and prepare period supplies.

It can reduce anxiety and make the first period feel less surprising.

What are the earliest signs that a first period is coming?

Early signs often include breast development, growth of pubic or underarm hair, increased vaginal discharge, mood changes, body odour, and mild acne.

These signs usually appear months or years before the first period.

How long after puberty does a first period usually start?

For many girls, a first period starts around one to two years after breast development begins. 

However, the timing varies widely, and all development timelines are normal.

What does a first period usually look like?

A first period is often very light and may appear as spotting, brown discharge, or a small stain in underwear rather than a heavy flow.

Early periods can be short, irregular, and easy to miss.

👉 Learn more about what a first period looks like.

Is it normal if a first period is irregular?

Yes. Early periods are often irregular, with different cycle lengths and flow amounts.

It can take a few years for periods to become regular, which is completely normal during adolescence.

When should parents speak to a doctor about a late first period?

It’s a good idea to speak to a doctor if a first period hasn’t started by age 15, or by age 13 if there are no other signs of puberty like breast development or pubic hair.

Very early puberty (before age 8) should also be checked.

What should parents do while waiting for a first period?

Parents can help by talking openly about periods, preparing a first-period kit, reassuring their child that development timelines vary, and encouraging their daughter to use the luna app.

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