A calendar that's yours
Pick your own colors, add stickers, and see when your next period is coming.
Period tracker for teens and tweens
Feel great about your period.
Luna helps you know when your period is coming, get ready for it, and understand what your body is doing. Made by a teacher, for the students who asked for it.
- No ads, ever
- Your data is never sold
- Passcode lock
What's inside
Everything you need, nothing you don't
Having a period is a lot to manage, but there's no need to be surprised.
Backgrounds and themes
Choose a photo, a color, or use a picture of your own.
Learn the real stuff
Short, honest answers to the things everyone wonders about.
Link a parent, if you want
A parent or guardian can follow along and help. Your notes are never shared.
Track
Know when it's coming
Log your period and Luna learns your rhythm, with predictions designed for teen bodies, whose cycles are often still settling in. Prep days and a discreet reminder give you time to pack a pad before the next one starts.
How tracking works
Learn
See how periods work
What actually makes a period happen? Interactive lessons walk you through your cycle step by step, so your body makes sense instead of feeling like a mystery.
Try the cycle lesson
Ask
Questions? Answered.
"How do I use pads and tampons?" "Is there a lot of blood?" The Question Box has clear, judgment-free answers, sorted by topic.
Open the Question BoxFrom the Learn tab
Read it here, too
Every lesson from the app, now on the web.
Normal Teen Periods
Why early periods are all over the place, what counts as normal, and when to check in with a doctor.Period Supplies
Pads, tampons, period underwear, liners and cups: what each one is and how to use it.Handling Cramps
What causes cramps, and five things that can make them feel better.Question Box
Things everyone wonders about
How often will I get my period?
At the beginning, it might feel like your period comes at random times. After your first period, it may not come again for a while. Especially at the beginning, each cycle may be different and can be anywhere from 20–45 days apart. You may even skip periods. Later they will become more regular. Cycles get a bit shorter as you get older. Every 28 days is just the average (in fact, only around 15% of women actually have cycles exactly that long). "Normal" periods means normal for your body.
Source: TeenHealth
Is there a lot of blood?
Not as much as you might think! Usually just a few tablespoons (30–45 mL) over the whole period. It may help to know that the blood doesn't come out all at once, usually less than a teaspoon (3–5 mL) at a time. You may notice that a different amount of blood comes out each day. Every person is different, and some people have heavier period flows than others.
Source: TeenHealth
Are there any signs that I'm getting my period?
Some people get symptoms (sometimes called PMS) like bloating or sore breasts before their period. As you start tracking your period, you can pay attention to your body to learn what is normal for you.
Source: TeenHealth
For parents & guardians
Help without hovering
With a parent account, you can link to your child's Luna, see when their next period is likely, and get a heads-up so supplies are ready. Their private notes stay private.
Luna for parentsthe Luna promise ♡
- No ads, ever
- Your data is never sold
- Optional passcode lock
Why Luna exists
Made by a teacher
Luna was created by a middle school teacher who wanted something genuinely helpful for their students: a period tracker without ads or grown-up assumptions.
[email protected]FAQ
Questions about the app
Who is Luna for?
Luna is made for teens, tweens, and anyone just starting their period. The predictions, the Learn section, and the Question Box are all written with young, still-settling cycles in mind.
Does Luna have ads?
No. Luna has no ads, ever, and your data is never sold.
Can I keep Luna private?
Yes. You can lock Luna with a passcode. If you link a parent or guardian, your notes are never shared with them.
What does Luna+ add?
Luna+ is Luna's subscription. It backs up your data so you can restore it on a new phone, and unlocks extras like photo backgrounds and calendar stickers. A parent's Luna+ can cover a linked child's backup.
Is Luna on iPhone and Android?
Yes. Luna is on the App Store for iPhone and iPad, and on Google Play for Android.
Get Luna on your phone
Track your period, get a heads-up before it starts, and learn how your body works.