Calla vs First 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.
First Period & Tracker
This app helps young individuals understand and prepare for their first period with personalized estimates and countdowns. After the first period, it transforms into a private tracker for subsequent cycles, logging moods and symptoms.
- First period estimation
- Body change tracking
- Period cycle tracking
- Mood and symptom logging
- Private data storage
- Preparation reminders
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Waiting for your first period? Bloomy helps you understand the signs, estimate when it may arrive, and feel prepared before it starts. Then, once your period begins, Bloomy becomes your private period tracker. BEFORE YOUR FIRST PERIOD Answer a few simple questions about the body changes you're noticing. Bloomy uses your answers to create a personalized first-period estimate and countdown. • See your personalized first-period estimate • Understand the signs your first period may be getting closer • Follow your countdown as your body changes • Get private reminders so you can be prepared at school • Learn what to expect before your first period AFTER YOUR FIRST PERIOD Tell Bloomy when it arrives and the app automatically becomes your period tracker. • Track your periods and cycle history • See your next estimated period • Log moods and symptoms • Use a simple period calendar • Get helpful reminders PRIVATE BY DESIGN Your sensitive tracking information stays on your device. Bloomy does not share your personal health data. FIRST PERIOD PASS Unlock Bloomy's complete pre-first-period experience with a one-time purchase. Your First Period Pass gives you continued access to your estimate, body-change tracking, countdown, guidance, check-ins, and reminders throughout your first-period journey. No recurring subscription is required for the First Period Pass. IMPORTANT TO KNOW First-period predictions are estimates based on the information you provide and patterns associated with body development. Bloomy cannot determine the exact day your first period will begin. Bloomy is designed to make growing up feel a little less uncertain — from the changes before your first period to every period that follows. Terms of Use (EULA) - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy - https://app.notion.com/p/sippa/Privacy-Policy-36c979ab50ab80e1bac8ce1538b2c6c3
Screenshots
Verdict
The clearest difference is in-app purchases: Calla at none against First Period & Tracker's 4. Calla also leads on iOS requirement (15.1 vs 18.0). First Period & Tracker's advantage is ratings volume (55 vs 5). 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. First Period & Tracker sells 4 in-app purchases, starting at $2.99 per 7 days. Calla asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.4 for Calla against 4.3 for First Period & Tracker. That said, the two scores are not equally well evidenced: First Period & Tracker has 55 ratings behind it against 5, so its average is the more settled of the two.
| Parameter | Calla | First Period & Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (5 ratings) — better | 4.3 (55 ratings) |
| Positive reviews | — | 37.5% of reviews |
| Number of ratings | 5 | 55 — better |
| Update frequency | — | Every 6 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 33 MB | 15 MB |
| Age rating | 12+ | 4+ |
| Developer | Roxana Heitz | Rajesh Yadav |
In-app purchases
Calla
No in-app purchases
First Period & Tracker
- Weekly Premium3 Days trial$2.997 Days
- Monthly Premium3 Days trial$9.991 Month
- Yearly Premium3 Days trial$39.991 Year
- First Period Pass$3.99









