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Cube is the simplest period tracker. You can log your days quickly, and Cube lets you know when your next period is coming.
It's simple, cute, and easy to use.
And because of its friendly design, you don't feel like using app for your period.

◎ Quick Data Entry
All you have to do is to log your period (Start date and duration). That's all!
Cube is an easy-to-understand app that dared to remove complex functions.

◎ Little Cubes Will Tell Your Next Cycle
There are many little cubes in Cube app. They'll form a number, and tell you how many days till your next cycle.
Cute cubes will cheer you up in the days when you tend to feel down.

◎ Monthly/Yearly Calendar
Cube shows you the past and future period dates in a simple year-view calendar.
You can also see your events from Apple's Calendar app in a month-view calendar. It'll come in handy when you check your schedule.


・ Easy-to-use period tracking (Log only start date and duration of your period)
・ List of your cycles
・ Monthly/yearly calendar shows your past and future period dates
・ Reminders of your next period, PMS, and ovulation (Premium)
・ Integration with Apple's Health app (write data and import existing Menstruation data from the Health app)
・ 13 themes and custom app icons to match themes (2 themes are free)

What’s New

Version 2.0.0

· Dark Mode Supported (iOS 13 only)
· Accessibility Improvements (Voice Control, Voice Over)
· Bug fixes

Ratings and Reviews

4.4 out of 5
259 Ratings

259 Ratings

Jc131d ,

Basic app with no sex stuff

I was looking for an app for my daughter to track her period but all of them include pregnancy and sexual things that I wasn’t really comfortable with her looking at. I use the flo app and I don’t want to answer questions from my 12 year old what “feeling frisky” means and she doesn’t need anything that tracks whether or not she has “unprotected sex”. Yuck. This app took me a few minutes to figure out and truthfully isn’t the most user friendly but it has absolutely no sections where I would want to cover my daughters eyes. I know there are lots of kids who at 12 or 13 are more aware of stuff but my kid isn’t and I just want her to have an app where she can track her period and see when she will get it again so I am very thankful that I found this app.

lkllng ,

Great concept

I really appreciate that this is a period tracker that isn’t overly concerned with pregnancy, fertility, etc. There are so many period tracker apps like that already, and if you’re not the least bit interested or in need of those features, having it shoved in your face all the time can get REALLY annoying. So I love that with this app you can just get the basic cycle predictions, and not have to have to bother with any of that other junk.

I also like how simple and straightforward the app is in general—it makes it really easy to just get in, look at or log the info you need, and move on. Everything is fast and snappy with a lovely modern layout and UI, unlike a lot of period trackers that are still stuck in 2010. I do wish there were a few more theme colors—green would be great—but that’s about my only quibble in that regard.

Having to pay for basic features like reminders is a bit of a drag, but I liked what the app was offering enough that it was worthwhile: a period tracker that’s nice to look at, quick to use, and doesn’t try to shove your face in ~fertility information all the time. Thank you for making an app like this!

dannidorko ,

Cute, simple, very useful little app

I was thinking how useful it would be to have a reminder, then realized I hadn’t checked for it. Three dollars gets you day, a few days before, a few more days before and a week heads up, and similar ones for ovulation and fertility, as well as predictions. It’s discrete and visual, and to put in a new period, you just click a button. You can also look back in a little list of your periods and their lengths, above which is a circle representing your cycle with a little blue cube indicating where you are, and a six month view showing the current month, two months previous, and projection for the next three. And again it’s super cute but also in a very neutral way that can appeal to almost anyone - a little white cube with eyes, a bunch of tiny cubes that organize themselves into the number of the day you’re on, a bluer-teal, white and grey color scheme that makes me feel like my cycle is pretty chill after all, and nothing to sweat about. I never write reviews. Worth every penny.


Flask LLP
13.2 MB
Health & Fitness

Requires iOS 12.0 or later. Compatible with iPhone and iPod touch.


English, Japanese

Age Rating
Infrequent/Mild Mature/Suggestive Themes
Infrequent/Mild Medical/Treatment Information
In-App Purchases
  1. Premium $2.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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