Period and Ovulation Tracker vs Calla
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Period and Ovulation Tracker
This app helps women track their menstrual cycles, predict ovulation, and manage fertility. It provides notifications for upcoming periods and contraceptive pills, along with a notepad for recording symptoms and early pregnancy signs.
- Track menstrual cycles
- Predict ovulation and fertility windows
- Receive period and pill reminders
- Log symptoms and notes
- View cycle history and forecasts
- Manage health records
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Period and Ovulation Tracker is an application for tracking women’s health. It is an app to monitor a woman’s cycle and her fertility time. Never miss the calculations on your periods again. Discover the pattern of your cycle with this tracker, and always get yourself prepared when you see signs of ovulation. Select days on the period calendar, track the next menstrual cycle phases, and begin to receive notifications from the menstrual cycle calculator. With the app, you also get access to reminders for your contraceptive pills. Make cycle adjustments where necessary and see detailed information about your cycle, including the number of days left and the ovulation time. With the in-built notepad, you can note symptoms, such as cramps, and other things in the phases of your cycle. Increase the chance of pregnancy by knowing when your fertility rate chances are high from the ovulation calendar. When you see the early signs of pregnancy, you can input these pregnancy symptoms in the notes. Easily manage your cycles with this cycle tracker on your mobile phone. Premium Features Effectively track menstrual cycle Track and manage health record Get your menstruation forecasts Get notifications for the next cycle Reminders for contraceptives pills Important! There is no free content inside! You must be signed in to access the app Payment is due upon confirmation of subscription purchase. Subscription will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. The cost of renewal depends on the subscription plan. Our Standard Subscription Plans: A 1 week subscription costs $4.99. For other currencies, the price corresponds to the price level in the App Store price matrix. A subscription with a free trial will automatically renew to a paid subscription. Through your account settings, you will be able to cancel or manage the auto-renewal of your free trial immediately after purchase. Please note: Any unused portion of a three-day free trial (if offered) will be forfeited when you purchase a premium subscription during the free trial. If you still have questions, then read our privacy policy and terms of use. Privacy Policy: https://docs.google.com/document/d/1FnwKjAlIm2ltyCMKR9Qc0iwrNSOwxpPQfECo3B81hoc/edit?usp=share_link Terms of Use: https://docs.google.com/document/d/1PeBry89O7sZXXKVLknQZxs0mAE-rhXtFo1rGKWzioOU/edit?usp=share_link
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.
Screenshots
Verdict
The clearest difference is in-app purchases: Calla at none against Period and Ovulation Tracker's 1. Calla also leads on rating (4.3 vs 4.0). On price, ratings volume, 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. Period and Ovulation Tracker sells 1 in-app purchase, starting at $9.99 per 7 days. Calla asks for nothing beyond the download.
Calla holds the better App Store score, 4.3 against 4.0. Both are backed by a comparable volume of ratings — 4 and 6 respectively.
| Parameter | Period and Ovulation Tracker | Calla |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) | 4.3 (6 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 | 6 — better |
| Update frequency | Monthly | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 93 MB | 33 MB |
| Age rating | 12+ | 12+ |
| Developer | Dmytro Melnichenko | Roxana Heitz |
In-app purchases
Period and Ovulation Tracker
- Women's calendar3 Days trial$9.997 Days
Calla
No in-app purchases
Questions
Is Period and Ovulation Tracker free?
Is Calla free?
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