Bloomy vs Flo for Teens

Bloomy vs Flo at a glance

Facts about Flo checked October 2026 from Flo's own help center and privacy policy (sources below).

The biggest difference: before vs after your first period

Most period apps, Flo included, start working once you log a period. That leaves a big gap for 9–13 year olds who haven't started yet and mostly just want to know "when is it going to happen?"

Bloomy fills that gap. You answer questions about your age and the signs you've noticed — breast buds, white discharge, a growth spurt, underarm hair — and Bloomy gives you an estimated first-period window. ACOG notes most girls get their first period about 2–3 years after breast development begins, which is the kind of pattern Bloomy uses. When your period arrives, you log it and Bloomy turns into a normal cycle tracker. Nothing to switch, nothing to set up again.

Age limits: why they matter for younger girls

Flo's help center says you must be at least 13 in most countries. That's not Flo being unfriendly — US law (COPPA) puts extra rules on apps that collect data from kids under 13. Because Bloomy keeps data on the phone and doesn't need an account, it's built to be suitable for younger girls from the start.

Privacy in plain English

• Flo: says it never sells data and holds ISO 27001 and 27701 certifications. It offers Anonymous Mode so your data isn't tied to your name or email. In 2021 Flo settled with the FTC over earlier data sharing and agreed to ask permission before sharing health data.
• Bloomy: no account, no email, no ads. Your logs stay on your phone by default, so there's no profile of you sitting on a server.

Both can be used privately. The difference is that with Bloomy, private is the default — you don't have to find a setting.

Content: adult vs teen-friendly

Flo covers sex, fertility, pregnancy and menopause because its users span every life stage, and it has a large community chat. That's useful for adults, but a lot for a 12-year-old. Bloomy only talks about what a teen needs: first-period signs, what discharge means, what to pack in a school kit, cramps, moods and irregular early cycles — in simple words.

Where Flo is better (honestly)

• It works on Android; Bloomy is iPhone only for now.
• It has far more features for older users — pregnancy mode, fertility tracking, health assistant content.
• It has a longer track record as a company.

Who should choose Bloomy

• Girls who haven't had their first period yet and want to feel ready.
• Tweens under 13 who are below Flo's age requirement.
• Parents who want an app with no strangers, no ads and no account.
• Teens in their first 2 years of periods, when cycles are often irregular.

And there's no "graduating" to another app: once her period starts, Bloomy is a full period and cycle tracker — period dates, cycle length, predictions, ovulation window, symptoms and moods. It's the only period app she'll need.