Comparison

noovu vs Four Phases

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

noovu

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See what your cycle is actually doing. Built with perimenopause in mind, and useful long before it. noovu keeps your periods, symptoms and medication in one place, and shows how they change over months and years – whether your cycle is regular now or not. It is a clear, uncluttered app: you record what matters, see what is changing and get on with your day. Fertility features, unsolicited advice and social feeds are left out on purpose, so it stays that way. WHAT YOU SEE • Today: the day you are on, and what is due. One tap for a period, a symptom, a pill • Calendar: the whole month at once, your records and your schedule together. Missed a day? Fill it in, or correct an earlier one, at any time • Stats: how your cycles and periods are changing, at 1, 3, 6 or 12-month grain, with typical, shortest and longest at a glance • Symptoms are yours: name them, colour them, hide the ones you have finished with MEDICATION, THE WAY PRESCRIPTIONS ARE WRITTEN • By cycle day: type "16-25". The count follows your real periods • As a repeating course: a pill every morning, days 15–28 of a 28-day pack, twice a week – independent of your periods • Placed once: a coil, an implant, a ring – no doses, no reminders, just a band across the days it is in • Each medication remembers when you started it and when you stopped • One reminder at your time, one more an hour later, and then it leaves you alone. Answer from the lock screen or your Apple Watch. Marking is optional; the reminder is the point YOUR DATA Your records are stored on your iPhone. noovu has no account, no advertising and no analytics, and the developer does not receive your records. They are part of your normal iPhone backup, and you can save a copy yourself at any time: one file with everything, restored on a new phone with one tap. Bring your period history with you from Apple Health or a Clue export. Apple Health sync is optional and off until you turn it on. Export a CSV for yourself or your doctor. Start with what happened today.

About

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.

Highlights
  • Daily phase view
  • AI Coach daily brief
  • Coach chat and toolkit
  • Per-phase guides
  • Color-coded calendar
  • Phase transition reminders
  • Optional Live Sync
Features
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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

noovu4 screens
Four Phases4 screens

Verdict

The call

The clearest difference is in-app purchases: noovu at none against Four Phases's 2. Four Phases's advantage is update cadence (every 3 days vs fortnightly) and iOS requirement (15.0 vs 17.0). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Four Phases sells 2 in-app purchases, starting at $9.00 per month. noovu asks for nothing beyond the download.

UpkeepUpdate frequency

noovu ships an update fortnightly, Four Phases every 3 days. Both last shipped on October 31, 2026.

Scorecard3 real differences · 6 level
noovu versus Four Phases: the parameters behind the verdict, then further details
ParameternoovuFour Phases
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyFortnightlyEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhoneiPhone, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size2 MB17 MB
Age rating4+12+
DeveloperTatiana MazurenokVoreli AI LLC

In-app purchases

None

noovu

No in-app purchases

2 purchases

Four Phases

Subscriptions2
  • Four Phases Pro$9.001 Month
  • Four Phases Pro Annual$89.991 Year

Questions

Is noovu free?
noovu is free to download, with no in-app purchases.
Is Four Phases free?
Four Phases is free to download, with in-app purchases available.
Do noovu or Four Phases have ads?
Neither noovu nor Four Phases shows ads.
Which is updated more often, noovu or Four Phases?
noovu ships an update fortnightly, and Four Phases every 3 days. Most recently, noovu was updated on October 31, 2026 and Four Phases on October 31, 2026.

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