Screenshots

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Juju home screen on cycle day 13 in the ovulation phase, with the fertile window, the next period and ovulation dates and a mood check-in
Period day 2 in the menstrual phase, with flow buttons from spotting to heavy and Ended today and Ended yesterday options
An October 2026 calendar with logged period days, highlighted fertile days and the details for cycle day 13
The Quick log sheet with period start buttons, a mood picker and symptom tags such as cramps, bloating, headache and fatigue
Pro insights with cycle regularity, a cycle length history chart and a mood trends chart
Pregnancy mode at week 24, comparing the baby's size to an ear of corn, with the estimated delivery date and buttons for kicks, weight and appointments
Postpartum mode on day 38, with today's feeds and sleep time, a mood check-in, water glasses and daily tasks
A printable cycle health report with average cycle length, period length, regularity, total logs and a table of cycles

Features

  • One-tap period log

    Log today, yesterday or any day, record the flow, and undo any tap.

  • Cycle calendar

    Logged periods plus the estimated next period and fertile days, shown on a calendar.

  • Pregnancy week by week

    Baby size, a due-date countdown, kicks, contractions, weight and appointments.

  • Postpartum and baby care

    Feeds, sleep with timers, diaper changes and growth milestones.

  • Daily check-in

    Mood, symptoms, water, vitamins, weight and notes in a few taps.

  • Partner sharing

    Invite your partner and choose what they see.

  • Insights and report (Pro)

    Cycle regularity, length history, mood trends and a printable report for visits.

About Juju

Juju follows three stages in one app and switches between Cycle Tracking, Pregnancy and Postpartum from the top of the screen. In cycle mode you log a period in one tap, for today, yesterday or any other day, and record the flow. The home card shows the cycle day and phase, and Juju estimates the next period, ovulation and the fertile window from your own logs and marks them on the calendar. These are estimates based on what you log, not medical advice: Juju is not a contraceptive method and does not diagnose or treat any condition.

During pregnancy the app follows your baby's weekly growth with a size comparison, counts down to the estimated delivery date and tracks symptoms, weight, appointments, kicks and contractions, with tips for each trimester. After the birth it switches to baby care: breastfeeding and bottle feeds, sleep with timers, diaper changes and growth milestones. A quick log covers mood, symptoms such as cramps, bloating or headache, flow, water and vitamins in a few taps.

You can invite a partner and choose what you share, from daily updates to milestones. Badges, levels and points reward consistent tracking, and Pro insights add cycle regularity, cycle length history and mood trends, with a printable report that puts cycles, symptoms and moods on one page for an appointment. Health data is encrypted in transit and stored on Juju's servers so it follows you across devices, and it is never sold or given to advertising networks. The app is available in English and Turkish.

Who it is for

Women who want to keep track of their cycle, a pregnancy or the first months with a new baby in one place, and partners who want to stay informed.

Juju — Cycle, pregnancy and baby care tracking in one app, shared with a partner you choose

Watch the trailer

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Built by Rui Codex

We design, build and publish our own apps with the same engineering we put into client software.

Juju is an ASP.NET Core (.NET 10) MVC web application with EF Core, SQL Server and ASP.NET Identity, packaged as an Android app with Capacitor, which also handles local notifications for reminders. Data is encrypted in transit and stored on the server so it follows the user across devices, and the app is localised into English and Turkish.

Technology

  • ASP.NET Core MVC
  • .NET 10
  • EF Core
  • SQL Server
  • ASP.NET Identity
  • Capacitor

Related services

Frequently asked questions

Is Juju free?

Yes. The core features are free and the app shows ads. Juju Pro is an optional upgrade that removes ads and gives early access to new features.

Is Juju a contraceptive or a medical app?

No. Juju's period, ovulation and fertile-window predictions are estimates based on what you log, not medical advice. It is not a contraceptive method and does not diagnose or treat any condition; talk to a healthcare professional about your health.

Can my partner see my data?

Only if you invite them. You can invite a partner and choose what you share with them.

Where is my data stored?

Your health data is encrypted in transit and stored on Juju's servers so it follows you across devices. It is never sold and never given to advertising networks.

Is Juju on iPhone?

Not at the moment. Juju is published on Google Play for Android phones and tablets; there is no App Store version yet.

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