My Body's BFF: Hormone Tracker
od ooster Health & Fitness iPhoneiPadiPod touch
My Body's BFF: Hormone Tracker is a free Health & Fitness app for iPhone and iPad by od ooster. Requires iOS 15.0. Updated October 11, 2026.
- Price
- Free
- on the App Store
- Size
- 56 MB
- Age 4+
- Updated
- Oct 11
- 2026 · v2.3.0
Screenshots
About My Body's BFF: Hormone Tracker
Finally understand why you feel off before your period. Track mood, energy, and symptoms. Your data stays yours. No selling. My Body's BFF turns your cycle into insight, so you finally understand why one week you feel unstoppable, and the next you're sad about a text message. It's like having a wise, supportive friend in your pocket who actually gets it. WHY IT'S DIFFERENT Pattern detection across mood, energy, sleep, stress, and symptoms, not just period dates Inner Winter, Spring, Summer, Autumn. your hormone cycle in language that actually makes sense Short tools for real moments: luteal anxiety, ovulation confidence, menstrual exhaustion WHAT YOU'LL ACTUALLY EXPERIENCE The relief of finally knowing: "That's progesterone, not me. Promise." Predictions that get smarter with every cycle you log Patterns you'd never notice on your own like how poor sleep on day 22 leads to mood crashes on day 25 A toolkit for your hardest days WHO IT'S FOR Anyone who feels "off" before their period and doesn't know why Anyone tired of period trackers that only count days Anyone who wants to understand their hormones, not just predict their next bleed Anyone tracking PMS, mood swings, or irregular cycles and looking for real patterns WHAT YOU GET Cycle and hormone phase tracking with personalized predictions Daily mood, energy, sleep, stress, and symptom logging Pattern detection across your full cycle Phase-specific tools for PMS, ovulation, and everything between A beautiful, easy calendar Stop wondering why you feel this way. Start understanding. Whether it's mood swings, sudden energy, weird cravings, or moments of zen. My Body's BFF helps you connect the dots and figure out what's actually going on. Not a medical tool. Not a replacement for therapy.
What’s new
Version 2.3.0 · Updated October 11, 2026
Your mood, energy and focus shift with your hormones, every month. My Body's BFF shows you your own pattern, so "why am I like this today?" becomes "it's that week again, and now I know why." Not a date on a calendar. A phase. YOUR PATTERNS, NOT THE AVERAGE WOMAN'S See which hormone phase you're likely in today, and what that has meant for you before Patterns from your own logs, with the receipts: "fatigue on 8 of your 11 luteal days" A weekly look ahead built only from your own data. Not enough data yet? It shows your progress instead of guessing Predictions from your own cycle length, not a textbook 28 days LOG IN SECONDS Four sliders: mood, energy, stress, sleep Period, symptoms, feelings, your day and food in one screen The app opens what fits your phase first, and your own most-logged items come first FOR YOUR HARDEST DAYS Short tools per phase, built on ACT and CBT by a psychologist A clear PDF overview of your cycles and symptoms to take to your doctor YOUR DATA STAYS YOURS No ads. No selling. No tracking SDKs Export or delete everything, any time ALSO Optional LH test and temperature (BBT) logging A mode for hormonal contraception Share your phase with a partner, if you want to Your phases as inner seasons: Winter, Spring, Summer, Autumn Dark mode Built by a psychologist. No team, no investors asking for your data. My Body's BFF does not diagnose anything and is not a contraceptive or fertility tool. Period pain that stops your life is not something to endure quietly: talk to a doctor.
App privacy
The developer, od ooster, reported these privacy practices to Apple.
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Diagnostics: Crash Data
- Health & Fitness: Health
- Contact Info: Email Address
Used for: Analytics, App Functionality
Alternatives to My Body's BFF: Hormone Tracker
Looking for apps like My Body's BFF: Hormone Tracker? Here are 6 similar apps on the App Store. The highest rated is Eve Rhythm: Cycle & Fertility (4.8/5), and all 6 are free to download.
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28: Period & Cycle Tracker
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Eve Rhythm: Cycle & Fertility
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MyFlo® Period Tracker Calendar
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Moody Month: Hormone Tracker
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Lively - Period Tracker, Cycle
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| My Body's BFF: Hormone Tracker | – | Free | October 11, 2026 | |
| 28: Period & Cycle Tracker | 4.6 / 5 (5,670) | Free | Oct 24, 2026 | Compare |
| Embody Space | 4.4 / 5 (175) | Free | Jul 2, 2025 | Compare |
| Eve Rhythm: Cycle & Fertility | 4.8 / 5 (3,061) | Free | Oct 23, 2026 | Compare |
| MyFlo® Period Tracker Calendar | 4.4 / 5 (14,299) | Free | Jan 29, 2026 | Compare |
| Moody Month: Hormone Tracker | 4.6 / 5 (884) | Free | Oct 22, 2026 | Compare |
| Lively - Period Tracker, Cycle | 4.8 / 5 (54,904) | Free | Oct 21, 2026 | Compare |