POWERED BY AI
The #1 free, women-led cycle tracker
A personalised daily update on what's happening in your body during your cycle, plus an AI bot you can ask anything, anytime.
Launch the tracker for free1B+ people already use Telegram worldwide
No extra app to download — the bot lives right inside the Telegram messenger, just like a regular chat.
ROSA LUNA
online
HOW IT WORKS
Get to know your body,
one day at a time
A quick start
Answer a few simple questions and the bot maps out your cycle.
Hi, I'm LUNA 🌙 When did your last period start? 🩸
Daily check-ins
Every day, a message about your phase, your body, and how you might feel.
Day 6 📆 — you're in the follicular phase 🌱 Energy usually starts climbing this week. How do you feel? 🫶🏼
Ask anything
Chat with it like a friend — it remembers your name and what you've told it.
Day 25 📆 — Feeling more tired than usual? Totally normal right now — here's why 💬
Tips along the way
Occasional advice and facts about your cycle, right when you need them.
Day 12 📆 Your skin tends to behave itself this week — a good time to leave it alone ✨
Private by design
Your conversations stay private
We built this with your privacy in mind: what you share with the bot stays in your conversation with it. You can delete your data anytime.
Read how we handle your dataGETTING STARTED
Start in three steps
No app to learn and no sign-up form — the tracker is a conversation inside a messenger you probably already have.
Open LUNA
One tap opens the bot inside Telegram. No account to create, no password, nothing else to install.
Open LUNA in TelegramAnswer a few questions
It's just a chat — LUNA asks, you tap your answer. Two minutes and your cycle is mapped.
When did your last period start? 🩸
On the 3rd
Good to know
Questions, answered
It was important to us to make this bot free and genuinely good — and WhatsApp doesn't give us that possibility. So all you need to do to start using it is install Telegram, the world-famous messaging app, and tap the link below to launch the bot.
Because this isn't how we make money — we're a period underwear brand, and that's our core business. We built this cycle tracker for our wonderful community, just like the free content we regularly share on Instagram about the female cycle, hormones, periods, breastfeeding, postpartum, and other topics that matter to women.
What you tell LUNA stays in your conversation with LUNA. We use it for one thing only: to work out where you are in your cycle and send you the right message on the right day.
And you stay in control — you can delete your data at any moment, straight from the bot. Just ask it to delete everything, and it's gone.
Two things. First, it's personal rather than generic: the AI works out your cycle from your own answers — which phase you're in, which day you're on — so what arrives each day is about your body, not about an average one.
Second, you can actually talk to it. Most trackers just show you a calendar. LUNA answers your questions in plain language, whenever something feels off or you simply want to understand what's going on.
Loved by the community
Your kind words 🤍
Our story
Built by a woman, for women
We built this bot the way we'd want it for ourselves: honest, free, and genuinely useful. No fluff, no upsell — just something that helps you understand your body a little better, every day.
— Sofia, founder of ROSA LUNA
14,000 usersReady when you are
Install Telegram if you don't have it yet, then tap below to start your first conversation with ROSA LUNA.