Period Tracker ` vs Four Phases
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Period Tracker `
This app helps you track your menstrual cycle, ovulation, and fertility windows with personalized predictions and reminders. Log symptoms, moods, and wellness details in a beautifully designed, intuitive interface. It offers unlimited logging and a focus on user privacy with no signup required.
- Smart period and ovulation tracking
- Live calendar with predictions
- Personalized reminders
- Fertility window insights
- Daily wellness logging
- Beautiful and intuitive design
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Take Control of Your Cycle – Naturally and Confidently! Meet your new go-to app for tracking your period, ovulation, and everything in between. Whether you're trying to conceive or simply stay in tune with your body, our app empowers you with clear insights and easy tracking—all in a beautifully designed, easy-to-use experience! NO SIGNUP and NO LOGIN is required, so you start tracking your period immediately with your privacy 100% secure! Our app has NO ADS and you can create an UNLIMITED number of period cycle logs! --- Why You'll Love It: • Smart Period & Ovulation Tracking - Log your flow, symptoms, moods, and more to receive accurate cycle predictions tailored to you • Live Calendar Feature - Our smart calendar helps you visualize your previous period dates, and also highlights your predicted future period dates and ovulation dates – all in a visually pleasing way! • Personalized Reminders - Never be caught off guard again with helpful nudges for your next period or ovulation • Fertility Window Insights - Plan ahead with intuitive ovulation forecasts and fertile days, backed by data • Daily Wellness Logging - Track everything from cravings and cramps to sleep and energy levels • Beautiful Design, Built for You - Enjoy a calming, intuitive interface designed to make tracking your cycle feel natural and empowering Whether you're just starting your period journey or have been tracking for years, our app supports you every step of the way—with clarity, confidence, and care! Download now and start feeling in sync with your body. Your cycle, your rhythm! --- Please note that the predictions provided by this app—including estimates for your next period and ovulation dates—are based on general patterns and the information you input. These are only estimates and should not be considered medical advice or used as a substitute for professional healthcare guidance. Individual cycles may vary, and many factors can influence accuracy. For any medical concerns, fertility planning, or health decisions, please consult with a qualified medical professional. The app and its developers are not liable for any outcomes or decisions made based on the information provided. Please refer to the terms of service for more information. --- Privacy Policy: https://www.spkstudios.com/privacy-period-tracker Terms of Service: https://www.spkstudios.com/period-tracker-terms-of-service
Four Phases
This app helps partners understand and support individuals through their monthly cycle. It provides daily insights into hormonal phases, actionable advice from an AI coach, and resources for better communication and care.
- Daily phase view
- AI Coach daily brief
- Coach chat and toolkit
- Per-phase guides
- Color-coded calendar
- Phase transition reminders
- Optional Live Sync
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Four Phases is the cycle tracker built for the other half of the relationship. Every month, her body cycles through four distinct phases, menstrual, follicular, ovulation, and luteal. Each one feels different. Each one needs something different from you. Most guys never learn this. Four Phases changes that. Set up her cycle once, just her last period and average cycle length. Four Phases predicts the rest. Open the app any day to see exactly where she is, what's probably going on for her, and what you can do today to show up for her. WHAT YOU GET Everything below is free for your first 7 days, then requires a Four Phases Pro subscription. • Daily phase view showing exactly where she is today and how far through • Daily Brief from the AI Coach: one concrete move, why it matters, what to say, what to skip, and a food tip, with a message you can copy and send • Coach chat and a toolkit (gift ideas, date plans, grocery runs, what-to-say scripts) for in-the-moment situations • Per-phase guides covering her energy, mood, what she needs, what to avoid, conversation starters, and date ideas • Calendar color-coded by phase, with her most fertile day marked • Reminders before phase transitions ("Luteal starts tomorrow") so you're never caught off guard • Optional Live Sync so her real dates flow to your app automatically • Built dark, designed for guys, no pink, no flowers, no clinical jargon • Your account keeps your setup on every device and links you to her WHY FOUR PHASES EXISTS Period-tracking apps were built for the person bleeding. Four Phases is the other half, built for the partner who wants to understand what's going on without making it weird. The information already exists. Most guys just don't have it organized in a way they'll actually use. Four Phases organizes it. The AI Coach turns it into a daily action. Being a good partner is mostly about showing up at the right time. Four Phases tells you when, and how. PRIVACY Four Phases runs on an account, because the point of it is to link two people: what she logs reaches your app, and what you set up follows you to a new phone. That means your cycle data, logged symptoms, notes and Coach history are stored in your private account, protected by row-level security so only you and the partner you link can ever read them. No ads, no data brokers, no cross-app tracking, no third-party analytics SDK. Her name is never sent to the AI, the app strips it on your device before any Coach request leaves. Usage analytics are a random install ID and an event name, never cycle data or anything you or Coach wrote. Delete any of it whenever you like, from inside the app: "Wipe it" clears your data and keeps the account, "Delete my account" erases the account and everything in it from our servers for good. NOT MEDICAL ADVICE Four Phases is educational software designed to help partners understand the menstrual cycle. It is not a medical device, not a diagnostic tool, not contraception, not fertility planning. If something seems off about your partner's health, talk to a real clinician. SUBSCRIPTION Four Phases is free to download, and every feature is free for your first 7 days. After that, a Four Phases Pro subscription is required to keep using the app, including the daily phase view, Daily Brief, Coach chat, toolkit, phase guides, calendar, reminders and Live Sync. Four Phases Pro is $9.00 per month or $89.99 per year. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://fourphases.io/privacy Built by a small team in Tampa Bay.
Screenshots
Verdict
The clearest difference is rating: Four Phases at 5.0 against Period Tracker `'s 4.0. Four Phases also leads on update cadence (every 3 days vs every 3 months). Period Tracker `'s advantage is ratings volume (4 vs 1) and iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and monetization model 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 Tracker ` sells 2 in-app purchases, starting at $4.99 per month and Four Phases sells 2 in-app purchases, starting at $9.00 per month. Whichever you choose, the download price is not the number that matters.
Four Phases holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
Period Tracker ` ships an update every 3 months, Four Phases every 3 days. The most recent releases landed on September 29, 2026 and October 13, 2026 respectively.
| Parameter | Period Tracker ` | Four Phases |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 3 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 55 MB | 17 MB |
| Age rating | 12+ | 12+ |
| Developer | SPK Studios LLC | Voreli AI LLC |
Customer experience
Period Tracker `
Four Phases
In-app purchases
Period Tracker `
- Period Tracker3 Days trial$4.991 Month
- Ovulation Cycle Tracker3 Days trial$39.991 Year
Four Phases
- Four Phases Pro$9.001 Month
- Four Phases Pro Annual$89.991 Year
Questions
Is Period Tracker ` free?
Is Four Phases free?
Which has better reviews, Period Tracker ` or Four Phases?
Do Period Tracker ` or Four Phases have ads?
Which is updated more often, Period Tracker ` or Four Phases?
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