Petalina: Period Tracker

Timastra

In-app purchases

About this app

Keep your period calendar and daily observations in one place. Petalina helps you log periods and symptoms, review recorded patterns and understand which days are estimates, with core records kept locally.

A clearer view of your day
Log flow, symptoms, mood, sleep, medication, private notes and other experiences. See your cycle-day ring and browse a calendar or list, with recorded and estimated days clearly distinguished. Choose the logging groups and shortcuts that suit you.

More from the records you keep
Explore Personal tools with optional Petalina Plus. Look back at recorded months and cycles, explore patterns and compare selected date windows. Save dashboards for the records you want together and logging templates that open your usual check-in items. Keep appointment questions, takeaways and personal checklists together, or explore a personal question over time with an observation project. Reviews describe your records; missing entries stay unknown, and comparisons do not establish a cause.

Try the tools before subscribing
Open a sample review or try a sample logging template in the free Plus demo. The temporary sample journal stays separate from your diary. Sample wearable and cloud connections are simulated. Your own reviews depend on the records you log.

Pregnancy, week by week
Track pregnancy weeks and an estimated due date. Browse educational development information and original stage illustrations. Keep symptoms, appointments and notes together, and use movement and contraction logging tools. You can record a birth or pregnancy ending and keep your history.

Your records, your choices
Core cycle and pregnancy logging, estimates, health lessons, basic reports, manual encrypted backup, JSON and CSV export, recovery and local deletion remain free. Choose what goes into an appointment summary; personal notes and reproductive records start excluded. You decide whether to save or share files outside the app.

Connect only when you choose
Plus also offers optional sleep and heart-rate imports from Health Connect and automatic encrypted Google Drive backup while your diary is open and unlocked. Imports need a compatible source and your permission; Drive backup needs a Google account. Core use does not. Manual encrypted backup and cloud recovery remain free. Set discreet reminders only if you want them. Choose a colour palette or dark mode, and use the optional app lock. No health-event advertising.

Optional monthly or yearly Plus
Google Play shows the actual localized price and renewal terms before purchase. Subscriptions renew automatically unless cancelled in Google Play. Cancellation keeps Plus through the verified paid term. After Plus ends, saved tools stay readable and exportable; creating new saved tools requires Plus. Availability depends on the installed version and Google Play region.

Read short health lessons with linked public sources. Petalina is intended for people aged 13 and older. It is not a medical device and does not diagnose, treat, cure or prevent medical conditions. General information only. Consult a healthcare professional for medical advice. Cycle and pregnancy estimates can be wrong; they are not contraception and do not guarantee conception. Development illustrations are general education, not an assessment of a pregnancy.

Privacy, support and deletion information: https://timastra.com/apps/timastra-cycle

What’s new

Today: The cycle ring now shows the same relative pregnancy-chance band as Calendar during the estimated fertile window.