Bloomy vs Clue for Teens
Short answer: Clue is a respected, science-based cycle tracker, but in the US it can't be used under 13 and needs parent permission under 16. Bloomy needs no account, starts before the first period and turns into a full period tracker after it — the only app she'll need. For girls 9–15, Bloomy is usually the easier choice; for older teens on Android who want deep cycle science, Clue is great.
Bloomy vs Clue at a glance
| Feature | Bloomy | Clue |
|---|---|---|
| Made for | Teens & tweens only | Menarche to menopause, all ages |
| Under 13 in the US | Designed for ages ~9+ | Not allowed (US child protection law) |
| Ages 13–15 | No extra steps | Must get parent permission + help with privacy settings |
| Works before first period | Yes — first period predictor | Focused on tracking periods |
| Account | Not needed | Check in app |
| Data location | On your phone by default | Clue's servers (Berlin, GDPR) |
| Paid features | Optional upgrade | Clue Plus — 18+ only |
| Devices | iPhone only | iPhone & Android |
| Tone | Teen-friendly, simple words | Science-led, gender-neutral |
| One app from before your first period through every cycle after | Yes — becomes a full period tracker automatically | Starts only after periods begin |
Clue facts checked October 2026 from Clue's support center and Terms of Service.
One app for the whole journey
Other apps start once periods have started. Bloomy starts earlier and never needs replacing — it's the only period app she'll ever need.
- 1
Before your first period
Bloomy estimates your first-period window from your age and body signs, explains every change in simple words, and helps you pack a school kit so you feel ready.
- 2
The day it starts
Log it in one tap. Bloomy switches itself into a full period tracker — same app, same data, nothing new to download or set up.
- 3
Every cycle after
Period dates, cycle length, next-period prediction, ovulation window, symptoms, cramps, moods and reminders — a complete period and cycle tracker for life.
Clue's age rules, explained simply
Clue is honest about its limits. When you first open it you confirm whether you're 16. Under 16, you're asked to get a parent's permission and help with privacy settings. In the US, under 13 isn't allowed at all because of COPPA, the US children's privacy law. And Clue's paid features require you to be 18.
That makes sense for a company storing health data on its servers. Bloomy avoids most of this by keeping logs on the phone and not asking for an account, so a 10-year-old can open it and start learning right away.
Before the first period
Clue's strength is understanding cycles you already have. Bloomy's main purpose is the time before: it estimates when your first period is likely, using your age and signs like breast development and discharge, then explains each sign in normal words. ACOG says most girls start 2–3 years after breasts begin to develop, usually between 12 and 13.
What Clue does better
- Android support and a long scientific track record.
- Very detailed tracking categories and research-backed articles.
- Great for older teens and adults who want to understand patterns deeply.
What Bloomy does better
- First period prediction and a step-by-step "what's happening to my body" guide.
- No age gate, no account, nothing for parents to set up.
- Language written for a 9–15 year old, not a medical textbook.
For parents
If your daughter is 13–15 and wants Clue, you'll need to give permission and help set it up. If she's younger, or you'd rather she use something with no account and no stored profile, Bloomy is the simpler start. And she never has to switch later — Bloomy becomes her full period and cycle tracker once her period starts.
Switching from Clue?
- ✓ Set up in about 2 minutes — just enter your last period dates
- ✓ No account, no email, no age gate or parent sign-up step
- ✓ Full period, cycle, ovulation, symptom and mood tracking from day one
Sources & further reading
- → Clue Support — How old do I have to be to use Clue?
- → Clue — Terms of Service (paid services 18+)
- → ACOG — Menstruation in girls and adolescents
This page is for education only and doesn't replace advice from a doctor.
The Clue alternative made for tweens
Free on iPhone. No account, no parent sign-up maze, data stays on her phone.