Duet: Fertility for Couples
Flag Fertility LLC Health & Fitness iPhoneiPadiPod touch
Duet: Fertility for Couples is a free Health & Fitness app for iPhone and iPad by Flag Fertility LLC. Requires iOS 15.1. Updated August 15, 2026.
- Price
- Free
- on the App Store
- Size
- 79 MB
- Age 17+
- Updated
- Aug 15
- 2026 · v1.0
Screenshots
About Duet: Fertility for Couples
Duet is the fertility app built for both of you. Most apps put the whole mental load on one partner. Duet turns trying to conceive into a shared plan, with a tailored experience for each of you on your own phone (or together on one). Duet requires a subscription. One subscription unlocks all features for both partners: TRACK YOUR CYCLE, TOGETHER • Cycle calendar with predicted fertile window and ovulation • Log periods, intercourse, ovulation and pregnancy tests in seconds • Your partner sees the fertile window too. No more "when was it again?" FOR BOTH SIDES OF FERTILITY • A cycle-tracking view for one partner, a sperm-health focus for the other • Daily supplement tracking with streaks for both of you • Weekly check-ins on sleep, stress, energy, and intimacy. See how you're doing as a couple LEARN AS YOU GO • Short, practical articles on timing, ovulation tests, sperm health, and the myths that waste your time • A weekly learning plan so you both stay on the same page BUILT FOR COUPLES • Link accounts with a simple invite code, and each partner gets their own view • One phone between you? Single-device mode tracks both partners on one account • One subscription covers both partners YOUR DATA STAYS YOURS • No ads. No analytics trackers. We never sell your data. • Your fertility data is shared with exactly one person: the partner you choose. • Delete your account and data anytime, right in the app. SUBSCRIPTION DETAILS Duet requires an auto-renewable subscription: Quarterly at USD 20.99 per 3 months, or Monthly at USD 12.99 per month. One subscription unlocks Duet for both linked partners. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Prices may vary by region. Privacy Policy: https://flagfertility.com/duet/privacy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
App privacy
The developer, Flag Fertility LLC, 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:
- Contact Info: Email Address, Name
- Purchases: Purchase History
- Diagnostics: Crash Data, Other Diagnostic Data
Used for: Analytics, Product Personalization, App Functionality
Alternatives to Duet: Fertility for Couples
Looking for apps like Duet: Fertility for Couples? Here are 6 similar apps on the App Store. The highest rated is MamaSafe - AI Doula (5.0/5), and all 6 are free to download.
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Male Fertility Tracker - 74
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Simple Habits: Weekly Tracker
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Skin+ Beauty Clinic
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MamaSafe - AI Doula
5.0
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Period & Cycle Tracker: Vela
5.0
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Juno: Male Fertility Tracker
5.0
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Duet: Fertility for Couples | – | Free | August 15, 2026 | |
| Male Fertility Tracker - 74 | – | Free | Oct 21, 2026 | Compare |
| Simple Habits: Weekly Tracker | – | Free | Aug 23, 2026 | Compare |
| Skin+ Beauty Clinic | – | Free | Sep 25, 2026 | Compare |
| MamaSafe - AI Doula | 5.0 / 5 (1) | Free | Jun 5, 2026 | Compare |
| Period & Cycle Tracker: Vela | 5.0 / 5 (1) | Free | Oct 13, 2026 | Compare |
| Juno: Male Fertility Tracker | 5.0 / 5 (6) | Free | Sep 20, 2026 | Compare |