Which period app is made for her first period?
The biggest period apps are made for adults, and several do not allow anyone under 13. We compare age, privacy, ads and features, using each app’s own terms and store listings.
At a glance
What each app declares in its own terms and on its App Store page, including its privacy label.
| Criterion |  Soso |  Flo |  Clue |  Period Calendar |  My Calendar |
|---|---|---|---|---|---|
| App Store age rating | 9+ | 13+ | 13+ | 13+ | 13+ |
| Works before the first period | Yes | No | No | No | No |
| Tracks puberty body changes | Yes | No | No | No | No |
| May track you on other companies’ apps and sites | No | Yes | Yes | Yes | Yes |
| Shows ads inside the app | No | No | No, but its terms allow them | Yes | Yes |
| Intimacy or fertility tracking | No | Yes | Yes | Yes | Yes |
| Requires creating an account | No, there is no account | No, it is optional | Yes | No | Only for cloud backup |
Soso vs.
Compare before choosing
Every page shows where Soso fits best, and when the competitor may be the right choice.
VSvs. Flo
Soso is made for a girl’s first period. Flo goes all the way to pregnancy and perimenopause.
Soso is made for a girl getting ready for her first period, before it arrives and through her first years of cycles. Flo is one of the biggest period apps in the world, with tools for trying to conceive, a pregnancy tracker and perimenopause tools with a menopause timeline, and its terms set the minimum age at 13.
VSvs. Clue
Soso starts before her first period. Clue tracks birth control, trying to conceive and pregnancy.
Soso needs no account, keeps her cycle data off our servers and is rated 9+. Clue is a respected, science-led tracker from Germany that logs birth control and has modes for trying to conceive, pregnancy and perimenopause. It needs an account, does not allow under-13s in the US and asks under-16s for a parent’s permission.
VSvs. Period Calendar
Soso has no ads and no intimacy log. Period Calendar has both.
Soso is made for a girl getting ready for her first period, with no ads and no adult features. Period Calendar is one of the most downloaded period trackers, with more than 100 million installs on Google Play, and it is not made for younger girls: it contains ads, logs intimacy and fertility, is rated 13+ on the App Store, and its privacy policy says it does not address anyone under 13.
VSvs. My Calendar
Soso has no fertility data. My Calendar shows it, unless you turn on Simple Mode.
Soso is made for a girl getting ready for her first period, so it has no fertility data and nothing to configure. My Calendar is a highly customisable tracker with fertility, pregnancy and perimenopause modes, and a Simple Mode that hides the fertility data, which it calls ideal for teens. It is rated 13+ on the App Store and contains ads.
Age appropriate
First-period context matters more than a huge feature list.
Honest about the others
Every page says where the other app is better, and for whom.
Verifiable information
We show what was checked in each source and the review date.
Frequently asked questions
What is the best period app for a 10-year-old?
One made for her age. Flo requires users to be 13 or older, Clue does not allow under-13s in the US, and Period Calendar and My Calendar are rated 13+ on the App Store. Soso is rated 9+, works before the first period, and has no ads and no account.
At what age can a girl use Flo or Clue?
Flo’s terms set the minimum at 13, or 16 in the EU and the UK. Clue does not allow under-13s in the US and asks users under 16 to get a parent’s permission.
Is there a period app for girls who haven’t had their first period?
Yes, Soso. She answers a few questions and gets an estimate of when her first period may arrive. With the First Period Prediction Pack she follows the signs of puberty, like breast and pubic hair development and her height each month, and the window narrows as she logs more. It is an estimate, not a date.
Can a period app track puberty before the first period?
Soso can. She follows her breast and pubic hair development by picking, in private, the closest of a set of illustrated stages, and logs her height each month. None of the other apps compared here tracks puberty body changes.
At what age do girls usually get their first period?
There is no single age. On average a first period comes at about 12, and it can start as early as 8. It is worth talking to a doctor if it comes before 9, if it has not started by 15, or if there are no other signs of puberty by 13.
Which period apps show ads?
Of the apps compared here, Period Calendar and My Calendar contain ads. Flo and Clue show none today, though Clue’s terms reserve the right to. Soso has no ads.
Do period apps track you?
Each app declares this in its App Store privacy label. Flo, Clue, Period Calendar and My Calendar all list data that may be used to track you across other companies’ apps and websites. Soso declares none, and her cycle data is never sent to our servers.
Has a period app ever shared users’ health data?
According to the US Federal Trade Commission, yes. In 2021 it alleged that Flo had shared users’ health data with marketing and analytics companies, including Facebook and Google, after promising to keep it private, and issued an order against it. Flo neither admitted nor denied the allegations. In 2025 Flo agreed to pay $8 million to settle a class action over the same sharing, without admitting wrongdoing, and the jury found Meta liable.
Does Soso need an account?
No. There is no Soso account. Her cycle data is stored on her phone and never sent to our servers. If you turn on backup, it goes to your own iCloud or Google Drive.