Life & fun · alternatives · 2026

24 alternatives to Birdy: Live in Sync

A private cycle-syncing app for food, fitness and flow

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1IM
I made a privacy friendly and simple app to track my menstruation▲732
Hey HN, after the app I actually used to track my period wanted me to log in and save my data in the cloud, I decided to write my own. Most apps in this area are based on a subscription model and display far too much information anyway. For me, a simple calendar is enough where I can add a few notes if necessary. So that is the result of my work - a simple design and the data is only saved on the smartphone.
2024 · play.google.com · its alternatives →
2
Nice▲182
Track your sex life privately. Sync with your partner.
Dec 2025 · its alternatives →
3
Nuty App▲51
Expert Driven Nutrition Diary
2024 · nuty.app · its alternatives →
4
Evoday▲304
Github-like streak calendars for your life habits 👨‍💻✅
2018 · apps.apple.com · its alternatives →
5
Habicy▲253
Track habits, share progress and connect with friends.
2024 · apps.apple.com · its alternatives →
6
Lotus▲92
A calendar to help women’s track their menstrual cycle
2017 · apps.apple.com · its alternatives →
7
SyncBird▲77
iOS sync and iTunes cleaning at a glance
2017 · minicreo.com · its alternatives →
8
Diarly Mood Tracking▲179
A stunning refresh to help you write more, think clearer
2024 · diarly.app · its alternatives →
9
LadyLog - A period tracker▲89
Easy to use period tracking app that respects your privacy
2024 · play.google.com · its alternatives →
10
Streaky▲102
Social habit tracking app to start and keep habits, together
2021 · its alternatives →
11
Libi▲103
Your personal mood and libido tracker
2019 · libitracker.app · its alternatives →
12
Life Fasting Tracker▲104
Easy and social way to do intermittent fasting
2018 · its alternatives →
13
POW!▲109
Take charge of your menstrual cycle securely 💪
2019 · usepow.app · its alternatives →
14
Bloomy▲7
Predict first periods and track every cycle after
Jun 2026 · apps.apple.com · its alternatives →
15
Simply Fast - Get in Shape▲9
Intermittent fasting made simple
Nov 2025 · apps.apple.com · its alternatives →
16
NerdCycle▲8
Shared tasks, lists and notes for the whole family
Jul 2026 · vladoivankovic.com · its alternatives →
17
Ring▲61
Contraceptive ring reminder
2020 · apps.apple.com · its alternatives →
18
I built a daily sunlight tracker▲46
I kept trying to explain how important outdoor light is and how most people aren’t getting enough. Eventually I figured that showing is more effective than telling. So we built a free app that uses your Apple Watch or iPhone to automatically track your light exposure throughout the day. It tells you if you’re getting enough, shows you how consistent you are, and rewards habits that support hormone balance. It's in beta on TestFlight, let me know what you think!
2025 · lumehealth.io · its alternatives →
19
Lutea▲57
Track your cycle - 100% transparent, 100% your data
2022 · play.google.com · its alternatives →
20BU
Birdly – Use your enterprise software from messaging apps like Slack▲35
2016 · infos.getbirdly.com · its alternatives →
21
Simply Track: Period & Cycle Tracker▲2
The private period tracker that grows with every cycle
Aug 2026 · simply-track.com · its alternatives →
22
Periody▲5
AI-powered period & ovulation tracking - Periody
Jan 2026 · periody.app · its alternatives →
23
Era - Period and Ovulation tracker▲6
Understand Your Body, Every Day.
2025 · app.meetmighty.com · its alternatives →
24
HerBattery▲3
The cycle awareness app built for men. No guessing.
Jun 2026 · herbattery.app · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →