Calla vs Teen Period Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calla
This app helps teens understand their menstrual cycles with privacy-focused tracking. It learns individual patterns for accurate predictions and allows logging of various symptoms to connect with cycle phases. Optional parent sharing provides a simple wellness update without revealing sensitive data.
- Personalized cycle predictions
- Symptom and mood logging
- Age-appropriate cycle insights
- Prep-day period reminders
- Optional parent wellness sharing
- Privacy-first data storage
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Most period apps were built for adults trying to get pregnant. Calla wasn't. It's built for teens who just want to understand what's happening in their body - without the noise, the upsells, or the ovulation countdowns. Your data lives on your phone. No accounts required. No ads. No third parties, no data brokers, no advertisers. Optional parent share, if you want it. Privacy-first. Always. All your data stays on your phone. No accounts. No cloud. No ads. No data selling. Period. Built for how your body actually works Irregular cycles? That's normal, especially when you're starting out. Calla doesn't just assume a 28-day cycle - it learns your patterns and gives you predictions that actually make sense for your body. Track what matters to you Log your period, flow level, mood, energy, cramps, sleep, skin, focus, appetite, and activity. See how your cycle connects to how you feel day to day. Understand your cycle Get gentle, age-appropriate insights about each phase of your cycle - what's happening in your body and what to expect. Prep-day reminders Get a heads-up before your period is predicted to start so you're never caught off guard. Parent Mode Share a simple wellness signal with a parent or guardian - "all good" or "heads up" - without revealing any cycle details. Communication on your terms. Calla is not a medical app. It does not diagnose, treat, or prevent any medical condition. If you have health concerns, talk to a doctor.
Teen Period Tracker
This app helps teens track their menstrual cycles and moods privately. It offers daily check-ins, educational content on puberty and wellbeing, and basic insights into symptoms. An optional subscription unlocks advanced tracking, deeper insights, and an ad-free experience.
- Period and cycle tracking
- Daily mood and symptom logging
- Puberty and wellbeing education
- Basic symptom insights
- Private, device-stored data
- Optional Pro subscription for advanced features
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The private period tracker made for teens. No ads. No account. No parent sign-in. Your logs stay on your phone. Get ready for your first period, know when the next one is coming, and understand how you feel — in a calm space made for your first years. No adult content. FREE — a complete period tracker Period & calendar • Log your period in one tap — light, medium, heavy or spotting • "Period in X days" countdown, shown as a likely date range • Predictions that learn from your own cycles and get better every month • Your full calendar history, with logged days and predictions clearly marked • Predictions are never saved as logs — you're always in control • Late? See how many days late it is, then tap "It started" when it begins • Gentle notes when your cycle is irregular — totally normal in your first years • See which phase of your cycle you're in, with a simple tip for today Not had your first period yet? • A calm "getting ready" home screen • Guides on the early signs and what to pack for school, in Learn • Tap "My first period started" and the tracker begins Daily check-in • Three quick steps: your cycle today, how you feel, how your body feels • 10 moods to choose from • 12 common symptoms like cramps, bloating, headache, backache, acne and stress, plus a note • A heads-up 2 days before your period, and a daily reminder to log Learn — every guide is free • 21 short, friendly guides: first period, pads vs tampons, what blood colour means, cramps, PMS, cycle phases, periods at school, sleep, stress and more • Daily tips on your home screen • No reading limits, ever Insights • 7-day and 30-day symptom charts • Your most frequent symptoms at a glance Try it first • A 30-second hands-on tour with sample data when you open the app Private by design • No ads, no account, no email, no parent sign-in • Your period, mood and symptom logs are stored only on your phone and are never sent to our servers • Dark mode and 20 languages PRO — go deeper • 90-day, 1-year and all-time charts • Tap any symptom to see every day you logged it and how strong it was • Extra symptoms and moods, and your own labels • Up to 3 daily reminders • Privacy lock with a PIN — nobody can peek • A tidy PDF report with your cycle history chart and symptom patterns — or copy it as text — to share with a parent or doctor Privacy Policy: https://sight35.com/privacy-policy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ This app is for information and personal tracking only. It does not provide medical advice, diagnosis or treatment. Always talk to a qualified healthcare professional about any health concern.
Screenshots
Verdict
The clearest difference is in-app purchases: Calla at none against Teen Period Tracker's 2. Teen Period Tracker's advantage is ratings volume (14 vs 4). On price, rating, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Teen Period Tracker sells 2 in-app purchases, starting at $3.99 per month. Calla asks for nothing beyond the download.
Teen Period Tracker holds the better App Store score, 4.9 against 4.8. Both are backed by a comparable volume of ratings — 4 and 14 respectively.
| Parameter | Calla | Teen Period Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4 ratings) | 4.9 (14 ratings) — better |
| Number of ratings | 4 | 14 — better |
| Update frequency | — | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 33 MB | 34 MB |
| Age rating | 12+ | 12+ |
| Developer | Roxana Heitz | Erdem Kara |
In-app purchases
Calla
No in-app purchases
Teen Period Tracker
- Premium - Monthly Subscription$3.991 Month
- Premium - Yearly Subscription$9.991 Year









