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App Store Apps > Health & Fitness > Once(A special period tracker)
App profile & analytics · Health & Fitness · Data updated 2026-10-02
Once(A special period tracker) icon

Once(A special period tracker)

by Malang Studio Co. Ltd, · Free · Version 1.9.7
Availability On the App Store since June 2015 ↗
Rating on App Store
3.71/5
86 ratings
Rating
3.71
86 reviews
Best rank
–
not in the top lists
Last updated
July 29, 2026
1.9.7
AppBrain's verdict Established

It doesn't have enough ratings yet to judge what users think.

Once(A special period tracker) is made and published by Malang Studio Co. Ltd,. AppBrain is an independent app data site and isn't affiliated with Malang Studio Co. Ltd,. The app name, icon, screenshots and description belong to Malang Studio Co. Ltd, and are shown as published on the App Store.

About Once(A special period tracker)

Once(A special period tracker) is a health & fitness app developed by Malang Studio Co. Ltd,.

What is the rating of Once(A special period tracker)?

Once(A special period tracker) is rated 3.71 out of 5 stars, based on 86 ratings.

Is Once(A special period tracker) free?

Once(A special period tracker) is free. The app size is 79.67 MB. The latest version available is 1.9.7. The last update was on July 29, 2026.

What are the requirements for Once(A special period tracker)?

The app has a content rating of Medium Maturity. The app has been available on the App Store since June 2015.

Description by Malang Studio Co. Ltd, (from the App Store)
To all the women who need a calendar to write down upcoming period
To all the women who need a journal to manage irregular period cycle and cramp
To all the women who want to know ovulation, fertile, birth control, and possibility of pregnancy all in one calendar
To all the women who were bothered to mark their period on the calendar
To all the women who secretly recorded symptoms on their planner
Must-have! Period tracker, Once!
[Kept both simplicity and functionality of period tracker!]

** Estimated period calendar which gets more accurate as you use it!
Once automatically calculates your irregular period cycle and cramp smartly!
In the period calendar, you can view your estimated period, fertile which has high percentage of pregnancy, and ovulation, all in one-step! In the calendar history list, you can view all your past period cycle in one-step.

** Take care of your fertile and ovulation meticulously!
You can take care of yourself even better with the calendar which shows fertile, ovulation, and estimated period in a glimpse of eye!

** A widget which allows you to check precious data quickly!
The first period calendar ever! Check the important info (estimated period, ovulation, and percentage of pregnancy) more quickly and easily with our widget.

** Percentage of pregnancy calculated scientifically!
Based on egg’s duration of life, 24hrs, and sperms’ duration of life, 3~5 days, we indicate percentage of pregnancy “high” for one day before and after the ovulation, and “moderate” for fertile.

** The day you must be prepared! Prepare it in advance!
To make you not embarrassed on the day! We notify the important dates (estimated period, ovulation/fertile and whenever you want) you in advance with witty message and alarm. We provide the alarm function of contraception pills.

** Keep your precious daily data conveniently!
Keep your data easier than a journal. All your recorded period, intimate days, memo, and automatically calculated ovulation and fertile… and all other data… You only need to sign-up to keep them all!

** Not just your period, but your secret intimate days!
You can record your status and symptoms such as the first day of period and period cramps, whenever you want.
Once, which you can record all your secrets such as intimate days! Don’t worry about others having a look at your diary, with our lock function.

** Simple and stylish design capturing women’s mind!
“The better it looks, the more convenient to use.” We have enhanced usability of calendar, by simple and stylish design. In the period calendar, you can view your estimated period, and ovulation, all in one-step. Just like a pretty planner you want to show off, the calendar design won’t be embarrass you even when you install it!


[We have added special features only available in Once!]

** Charming and interesting “Today’s Tip”, which changes depending on your cycle!
Beauty tips which makes you attractive and charming depending on period cycle, ovulation, and fertile. Useful real-life know-hows, useful diet tips, tips to prevent pregnancy, tips for healthy relationships… we enhance your charm by providing various tips!

** Once events made exclusively for women!
Staring from Once beauty pouch fully packed with sense, and Once doctor which provides exact information on diet and health… We hold various events on beauty, diet, and health, which suits women’s appetite!

---------------------------------------

Please be with Once, we are doing our best to bring you the best service :D
Developer: Malang Studio (http://malangstudio.com/)

* You can get faster response for questions regarding Once if you write to once@malang.kr!


This service includes In-app Purchase items, and a separate fee will be charged for purchase.

- Terms of Service : https://bit.ly/38zBlvj
- Privacy Policy : https://bit.ly/3iqaZ3g

Contact
Tel. support@malang.kr / +827050386396
Address. 11th floor, 508, Eonju-ro, Gangnam-gu, Seoul, Republic of Korea
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Screenshots

Once(A special period tracker) Screenshot 1 of 5
Once(A special period tracker) Screenshot 2 of 5
Once(A special period tracker) Screenshot 3 of 5
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Once(A special period tracker) Screenshot 5 of 5
Screenshots by Malang Studio Co. Ltd,, from the the App Store listing
3.71 · 86 reviews
Official page on the App Store

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Changelog of Once(A special period tracker)

No changelog data

Developer information for Malang Studio Co. Ltd,

Malang Studio Co. Ltd,

Address:

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App Store Rankings for Once(A special period tracker)

This app is not ranked

Technologies used by Once(A special period tracker)

Frequently asked questions about Once(A special period tracker)

Is Once(A special period tracker) free?

Yes. Once(A special period tracker) is free on the App Store.

Is Once(A special period tracker) still available?

Yes. Once(A special period tracker) is on the App Store, and the last update we saw was on July 29, 2026.

How large is Once(A special period tracker)?

Once(A special period tracker) is 79.67 MB.

Is Once(A special period tracker) suitable for children?

App Store gives Once(A special period tracker) a medium maturity rating, so it is not meant for young children.

How do people rate Once(A special period tracker)?

Once(A special period tracker) scores 3.71 out of 5 stars, from 86 ratings on the App Store.

Who made Once(A special period tracker)?

Once(A special period tracker) was developed by Malang Studio Co. Ltd,. It is listed in the health & fitness category on the App Store.

What are the best alternatives to Once(A special period tracker)?

People looking at Once(A special period tracker) also look at these health & fitness apps: Easy Menstrual Period Tracker, Blood: Period & Cycle Tracker, Period Tracker Widget, Track Your Period, MMD Period Tracker Calendar.

Apps other people are watching Popular Health & Fitness Apps Price drops on Google Play Today's trending apps Top new apps
Easy Menstrual Period Tracker icon Easy Menstrual Period Tracker
Blood: Period & Cycle Tracker icon Blood: Period & Cycle Tracker
Period Tracker Widget icon Period Tracker Widget
Track Your Period icon Track Your Period
MMD Period Tracker Calendar icon MMD Period Tracker Calendar
Vio Period Tracker Cycle Diary icon Vio Period Tracker Cycle Diary
Ovulation Calendar: Period Log icon Ovulation Calendar: Period Log
Overview Alternatives Reviews Rankings Technology
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