Luna vs Emberly Private Period Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Luna
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Luna is the period and fertility tracker that keeps your most personal health data exactly where it belongs — on your device. No accounts. No cloud sync. No data sharing. Just intelligent, private cycle tracking powered entirely by on-device machine learning. YOUR DATA NEVER LEAVES YOUR PHONE Luna was built from the ground up with privacy as the foundation. Every prediction, every insight, every log entry is processed and stored locally. We can't see your data because it never reaches us — not even anonymized. SMART PREDICTIONS, PRIVATELY POWERED Luna's on-device ML model learns your unique cycle patterns over time, delivering increasingly accurate predictions for: Period start and end dates Fertile windows and ovulation estimates PMS and symptom pattern recognition Cycle length trends and irregularities TRACK WHAT MATTERS TO YOU Daily symptom and mood logging Flow intensity and duration Basal body temperature (BBT) Cervical mucus and ovulation signs Intimacy and contraception notes DESIGNED FOR EVERY BODY Luna adapts to irregular cycles, post-hormonal transitions, perimenopause, and more. There's no "normal" cycle — Luna learns yours. BUILT FOR TRUST At a time when reproductive health data has never been more sensitive, Luna takes a firm stance: what happens on your phone stays on your phone. No account required to get started. No subscription needed to unlock your own data. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Emberly Private Period Tracker
This app helps you track your menstrual cycle privately and securely on your device. It predicts your period and fertile window, logs daily details like mood and symptoms, and provides insights into your cycle patterns. All data is stored locally with no account or cloud required.
- Period and fertile window prediction
- Daily logging of flow, mood, and symptoms
- Cycle pattern analysis
- Discreet period start reminders
- Face ID/PIN lock
- Offline functionality
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Emberly is a period tracker with nothing to hide, because it holds nothing of yours. Your cycle lives on your iPhone: no account, no cloud, no ads, and nobody quietly sharing your health data with an analytics company. And you shouldn't need a subscription to track your own period. Emberly is free for your first full cycle, then a single $9.99 purchase makes it yours forever. WHAT IT DOES • Predicts your period and fertile window, and gets sharper with every cycle you log • Logs a day in seconds: flow, mood, energy, symptoms, sleep, notes • Shows your patterns: cycle length, regularity, and how each phase tends to feel • Reminds you before your period starts, with discreet wording so your lock screen keeps your business to itself • Locks behind Face ID or a PIN • Works completely offline, airplane mode included WHY IT'S DIFFERENT Most period apps run on servers, and health apps are not bound by HIPAA. Emberly can't share your data because it never has it: there are no servers, no analytics, no advertising SDKs, and no third-party trackers in the app. Everything is computed on your phone. Backups are files you create yourself and save wherever you choose, like your own iCloud Drive. Privacy here isn't a policy promise. It's the architecture. PRICING, PLAINLY Your first 30 days are free and include every feature, one full cycle's worth. Nothing to start and nothing to sign up for. When the free month ends, keeping access takes a one-time $9.99 purchase. No subscription, nothing renews, and there's nothing else to buy. If you decide not to purchase, your data stays yours: backing it up remains available either way. A NOTE ON HONESTY Emberly's predictions are estimates based on the dates you log. It is not a contraceptive, not a diagnostic tool, and not a substitute for a clinician. If something about your cycle concerns you, please talk to a doctor. Questions? A human answers at support@furstenburgdigital.com. Furstenburg Digital LLC · furstenburgdigital.com
Screenshots
Verdict
Luna and Emberly Private Period Tracker are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Luna sells 2 in-app purchases, starting at $6.99 per month and Emberly Private Period Tracker sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Luna ships an update every 2 months, Emberly Private Period Tracker every 6 weeks. Both last shipped on October 31, 2026.
| Parameter | Luna | Emberly Private Period Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 24 MB | 7 MB |
| Age rating | 12+ | 12+ |
| Developer | Thompson Software LLC | Furstenburg Digital LLC |
In-app purchases
Luna
- Monthly$6.991 Month
- Yearly$39.991 Year
Emberly Private Period Tracker
- 30-day TrialFree
- Emberly Forever$9.99









