Every phase, in plain English
Period, follicular, ovulation, luteal — we explain what's happening in your body today, not just where you are on a chart. No jargon. No guessing.
A period app that reads your body like a best friend — not a chart. Track every phase, talk to Bestie (your AI cycle coach), and never feel surprised by your own body again.
Early access · $4.99/mo · 7-day free trial · Cancel anytime.
App Store + Google Play coming soon while we finish review.
Other period apps treat your body like data they can sell. We don't. Three things we did differently from day one:
We don't sell your data. We don't run ads. We don't share with insurers, employers, or brokers. The business model is paid subscriptions — that's it.
Bestie reads your last 30 days of logs and talks to you like a friend with a women's-health PhD. Not a chatbot script.
The first cycle app built with Niddah in mind. Selectable customs, hefsek taharah + shivah neki'im tracking, mikvah reminders. Private and respectful.
Track in 30 seconds. Predictions that get sharper every cycle. AI guidance that actually reads your logs. Reports your doctor can use.
Period, follicular, ovulation, luteal — we explain what's happening in your body today, not just where you are on a chart. No jargon. No guessing.
Your AI cycle coach reads your logs. Ask anything — "why am I bloated?", "is this cramp normal?", "should I push my workout?" — and get an answer that fits your body.
Generate a polished report for your OB/GYN, therapist, fertility specialist, perimenopause clinician, or pharmacy in under a minute. Bring data, not vibes.
Talk instead of type. We transcribe in real time and surface emotional themes across your cycle so you can finally see the patterns yourself.
The first cycle app built with Halacha in mind. Selectable customs, hefsek taharah & shivah neki'im tracking, mikvah reminders. Private and respectful.
End-to-end encrypted. Never sold. Never shared with advertisers. And you can delete everything — every log, every voice memo, every chat — anytime.
You don't need a chart-reading degree. You don't need to log every symptom every day. Predictions get more accurate the more you use it — but they're useful from day one.
Sign up, tell us when your last period started, and (optionally) anything you remember about your cycle. That's the entire onboarding.
Open the app, hit the + button, and log mood, flow, symptoms, or sex. Or skip the buttons entirely and tap-and-hold to journal with your voice.
The more you log, the more your cycle reveals. Phase guides, symptom patterns, fertile window predictions, and Bestie's daily read all come from your body, not someone else's.
Bestie is built on Anthropic's Claude — the same model trusted by Apple, Notion, and the US government. We feed it your last 30 days of logs and your cycle context, and it talks to you like a sharp, kind friend who happens to have a women's-health PhD.
No streak-guilt. No "Aunt Flo". No diagnoses. Just plain, useful answers — and a flag if something needs a doctor.
🔒 Your messages aren't used to train any AI. Zero retention by Anthropic. Delete anytime.Toggle Niddah mode in Settings and the app reshapes itself around hilchot family purity. No more juggling a separate calendar. No more guessing dates.
One tap generates a polished, doctor-ready PDF summarizing the patterns in your cycle — exactly the way clinicians want to see them. Six pre-built report types:
No ads. No data sale. No insurance broker pipeline. End-to-end encryption available. Delete everything in one tap.
Most of the app is free forever. Premium unlocks unlimited Bestie, voice journals, end-to-end encryption, and multi-device sync. 7-day free trial. Cancel anytime in one tap.
Everything you need to track your cycle.
For people who want the full experience.
Don't see your question? Email support@girlharmony.com. A real person reads every message.
Yes, free is actually free, forever. You get cycle tracking, predictions, symptom logging, phase guides, Niddah mode, 5 Bestie messages a day, and one doctor visit PDF a month. No card required, no ads, no upsell pop-ups.
Premium ($4.99/mo) unlocks unlimited Bestie, voice journals, all 6 doctor PDF types, end-to-end encryption, and multi-device sync. That's the entire monetization story — there's nothing else hidden.
Yes. We don't sell your data, we don't run ads, we don't share with insurers or advertisers, and there's no Facebook SDK, Google Analytics for personal data, or any other ad-tech tracker in the app.
Bestie (the AI cycle coach) runs on Anthropic's Claude. Anthropic has a contractual zero-retention, zero-training agreement with us — your messages aren't stored by them and aren't used to train any model.
Full details in our privacy policy.
App Store + Google Play submissions are in progress — we're waiting on the D-U-N-S verification required for organization-tier developer accounts. In the meantime, you can:
• Download the signed Android APK directly from this page (works on any Android phone).
• Use the full web app at app.girlharmony.com on any device — iPhone, Android, desktop.
Everything (cycle tracking, Bestie, Niddah mode, voice journals, doctor PDFs) works identically across all three. We'll email you once we hit the stores.
1. Tap the Download Android APK button on this page. The file (5 MB) downloads to your phone.
2. Open the file. Android will ask you to enable "Install unknown apps" for whichever app you used to open the download (usually your browser or Files app). Tap Settings → Allow from this source.
3. Tap Install. Done. You can revoke "Install unknown apps" permission afterward.
The APK is signed with our production certificate, so when we ship the Play Store version later, you'll get a clean upgrade without losing data.
Yes — the web app at app.girlharmony.com works on iPhone Safari. You can add it to your home screen (Share → Add to Home Screen) and it'll behave very close to a native app.
The native iOS App Store version is coming. We're in the Apple Developer enrollment queue — usually 1–4 weeks once submitted.
Niddah mode is an optional feature for users who observe Jewish laws of family purity (hilchot niddah). When you enable it in Settings, the app tracks hefsek taharah, the shivah neki'im count, and mikvah dates, with the right counting logic for your selected custom (Sephardi, Ashkenazi, Yemenite, or Chabad).
If you don't observe niddah, leave it off — you'll never see it in the app. If you do, it lives in your Settings and Cycle screens only.
Niddah data is treated as religious data (GDPR Article 9 special category) — never shared, never used for analytics, never visible to anyone but you.
On the free plan: your data lives on the device you log it on. Free accounts get cloud sync for the core cycle dataset (so you can recover after losing your phone), but multi-device live sync is a Premium feature.
On Premium: real-time sync across iOS, Android, and web. Open any device, and you pick up where you left off.
No. Girl Harmony is a cycle-tracking and wellness app, not a medical device. Predictions are statistical estimates — they will sometimes be wrong.
Don't use Girl Harmony as your only method of contraception or as the sole basis for fertility planning. For those decisions, talk to a clinician and consider FDA-cleared tools designed for that purpose.
Bestie's replies are AI-generated and are not medical advice. If something sounds clinically important, we'll suggest seeing a doctor — please listen.
Open the app → You → Settings → Delete account. Confirm. Done.
Or visit app.girlharmony.com/delete-account from any browser. Or email privacy@girlharmony.com from the address tied to your account.
Deletion is permanent and cannot be undone. We process all requests within 30 days (usually within 24 hours) and purge backups within the same window.
Girl Harmony is built by Choclement LLC, the parent company of the Girl Chocolate consumer brand. We started Girl Chocolate as functional chocolate bars timed to the menstrual cycle. Girl Harmony is the daily companion — a soft-spoken, body-literate place to track your cycle and actually understand what your body is asking for.
We're based in New York. Reach us at support@girlharmony.com.
Track in 30 seconds. Get sharper insights every month. Talk to Bestie when you need her. Never be surprised by your own body again.
Free forever for the core features. Premium $4.99/mo · 7-day trial · cancel anytime.
App Store + Google Play coming soon while we finish review.