# Once(A special period tracker)

> Health & Fitness

Canonical page: [https://chrome-stats.com/d/id990572129](https://chrome-stats.com/d/id990572129)

## Overview

- **ID:** `id990572129`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Malang Studio Co. Ltd,
- **Category:** Health & Fitness
- **Rating:** 3.70 / 5 (86 ratings)
- **Version:** 1.9.7
- **Last updated:** 2026-07-29
- **First published:** 2015-06-17
- **Size:** 80 MB
- **Data as of:** 2026-09-20
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/once-a-special-period-tracker/id990572129)
- **Website:** [https://assets.adxcorp.kr/redirect?url=https://apps.adxcorp.kr](https://assets.adxcorp.kr/redirect?url=https://apps.adxcorp.kr)
- **Privacy policy:** [https://docs.google.com/document/d/e/2PACX-1vTZ1Zj549xTEKRZ7E4njirQ-W54-p1KEWaZBWmRwgQxhkrDJeSeA0r0n83iKSXuiVwT9BZ5veWhjbVh/pub?embedded=true](https://docs.google.com/document/d/e/2PACX-1vTZ1Zj549xTEKRZ7E4njirQ-W54-p1KEWaZBWmRwgQxhkrDJeSeA0r0n83iKSXuiVwT9BZ5veWhjbVh/pub?embedded=true)

## Description

Once is a stylish period tracker and calendar that estimates your period, fertile window, and ovulation all in one view. It supports logging periods, symptoms, and intimate days, offers reminders and alarms, and keeps your data private with a lock feature.

With a fast widget for quick checks, scientifically-informed pregnancy indicators, and cycle-aware tips, Once helps you manage health and privacy in a simple, beautiful interface.

## Rankings

- #155,593 — Overall

## Similar extensions and apps

- [Period Tracker - Calendar](https://chrome-stats.com/d/id6547871794)
- [My Period : Period Tracker](https://chrome-stats.com/d/id6741918423)
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- [Period Tracker Period Calendar](https://chrome-stats.com/d/id896501514) — 4.90 / 5
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- [Period Tracker - Cycle Tracker](https://chrome-stats.com/d/id1472492169) — 4.40 / 5
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- [Period Tracker • Ovulation App](https://chrome-stats.com/d/id6474987580) — 4.90 / 5
- [Period and Ovulation Tracker](https://chrome-stats.com/d/id1661911018) — 5.00 / 5
- [Period Tracker - Cycle Log App](https://chrome-stats.com/d/id6474762886) — 4.30 / 5
- [My Period Tracker & Ovulation](https://chrome-stats.com/d/id6760992177)
- [Period Tracker Calendar App](https://chrome-stats.com/d/id6755677889) — 4.40 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/id990572129)