Comparison

Period Tracker vs Red Diary

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

Head to head
About

Period Tracker

Features
Read full description

Meet Neva, a private period tracker with an illustrated companion. Log your period in one tap, see your predicted period, fertile window and ovulation, and get a daily tip for your cycle phase. Your cycle data stays on your iPhone. TRACK YOUR CYCLE • Log your period in one tap • A calendar with your predicted period, fertile window and ovulation • Predictions based on your last cycles • PCOS or irregular cycles mode: Neva shows a range instead of a single date LOG YOUR DAY • Flow, symptoms, mood, sex, ovulation test, basal temperature and notes, all in one day sheet REMINDERS • Period coming, fertile window and daily log reminders • Pill reminder with Taken and Snooze buttons YOUR COMPANION • Neva is an illustrated companion with 6 looks to choose from. Her expression follows your cycle phase • A daily tip for your phase INCLUDED • Period logging, calendar and predictions • Day log, reminders and daily tip • Neva, your companion • Small Home Screen widget • Face ID or passcode lock • Export your data (JSON, CSV) or delete everything • 15 languages PREMIUM • Insights: average cycle and period length, variation, charts, and symptoms and moods by phase • Tips personalized to your symptoms • Medium and Lock Screen widgets PRIVATE BY DESIGN No account. Your cycle data stays on your iPhone, not on our servers. Neva only uses anonymous app analytics, never your cycle data. Premium is a weekly or annual subscription (the annual plan starts with a free trial) or a one-time lifetime purchase. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel them in your Account Settings. Prices may vary by country. Neva shows estimates. Not a method of contraception. Not medical advice. Privacy Policy: https://www.enduranceapptitude.com/somama/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Red Diary

This app analyzes your symptoms, mood, energy, sleep, and activity to provide personalized insights and daily guidance tailored to your cycle phases. It offers a body weather forecast and smart recommendations for exercise, nutrition, and self-care.

Highlights
  • Personalized cycle insights
  • Smart daily guidance
  • Body weather forecast
  • Cycle tracking modes (fertility, pregnancy, birth control)
  • Symptom and mood logging
  • HealthKit integration
  • Apple Watch companion app
Features
Read full description

A period and cycle tracker that keeps your data on your phone. No account. No cloud. No tracking. No ads. Most period apps send your most private information to their servers. Red Diary doesn't have servers. Free to track your cycle, log symptoms, and get predictions — no trial, no card, no expiry. Premium unlocks the fertility, pregnancy, and insight modes. PRIVATE BY DESIGN Your cycle history, symptoms, and intimate details never leave your device. There is no account to create, no server to breach, and no company reading your data. Export anytime for a doctor's visit or your own backup — it's your information. BUILT FOR REAL CYCLES, NOT AVERAGE ONES Most trackers assume a textbook 28 days and get confused when yours doesn't cooperate. Red Diary reads each cycle on its own terms, so irregular, long, short, and changing cycles are understood instead of flagged as wrong. BODY WEATHER Your own forecast, built from your own logs. Red Diary looks for patterns across your history and tells you what today has tended to look like for you — sunny, clear, mixed, overcast, or stormy. If it doesn't have enough history to say something true, it tells you that instead of guessing. WHAT SHOULD I DO TODAY? Every time you open the app, you get an answer. Phase-aware guidance for movement, food, and rest that shifts as your body does. FOUR MODES Track My Cycle — phase-by-phase analytics and predictions Trying to Conceive — fertile window, peak day, cycle health, and support through the two-week wait Avoid Pregnancy — honest fertility status, including the days it can't be certain about I'm Pregnant — 40 weeks of content, kick counter, appointments, and trimester insights Switch whenever life changes. The app changes with you. A CALENDAR THAT ACTUALLY WORKS Start and end your period with one tap, right from the calendar. Backdate cycles you missed. Log intercourse. See period, predicted, fertile, and logged days at a glance — with moon phases, if you like tracking alongside them. WHY YOU FEEL LIKE THIS Log symptoms, mood, sleep, temperature, and more. Red Diary finds what repeats across your cycles and explains what's behind it, instead of just recording it. SHARE HOW YOU FEEL Send a phase-aware note to a partner, a friend, or your birth control buddy through iMessage, WhatsApp, or anywhere else. No accounts, on either end. ON YOUR WRIST Cycle day, phase, and progress ring on your watch face in phase-matched colors. Start or end your period, log your mood, and get guidance without reaching for your phone. APPLE HEALTH Steps, calories, exercise, and sleep flow in automatically. See how your energy and activity really shift across your cycle — no extra logging. BIRTH CONTROL REMINDERS Pill, patch, ring, shot, IUD, or implant. On-time reminders, streak tracking, and insights that adapt to your method. WHAT'S PREMIUM Trying to Conceive, Avoid Pregnancy, and Pregnancy modes, Body Weather, full cycle insights, fertility analytics, and mood sharing. Cycle tracking, logging, predictions, calendar, and birth control reminders are free and stay free. Privacy Policy: https://dormeusapps.com/reddiary-privacy.html Terms of Use: https://dormeusapps.com/reddiary-terms.html

Screenshots

Period Tracker4 screens
Red Diary4 screens

Verdict

The call

The clearest difference is update cadence: Red Diary at every 3 days against Period Tracker's every 3 weeks. On price, ads, in-app purchases 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. Period Tracker sells 5 in-app purchases, starting at $4.99 per 7 days and Red Diary sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Period Tracker ships an update every 3 weeks, Red Diary every 3 days. The most recent releases landed on November 12, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 9 level
Period Tracker versus Red Diary: the parameters behind the verdict, then further details
ParameterPeriod TrackerRed Diary
PriceFreeFree
Rating—5.0 (9 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—9 — better
Update frequencyEvery 3 weeksEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS18.017.6 — better
Further details — not scored
Size21 MB8 MB
Age rating12+12+
DeveloperLucas DiazRUBINS DORMEUS

In-app purchases

5 purchases

Period Tracker

Subscriptions3
  • Weekly$4.997 Days
  • Premium Monthly1 Month trial$9.991 Month
  • Annual7 Days trial$39.991 Year
One-time2
  • Unlimited access$2.99
  • Lifetime$59.99
2 purchases

Red Diary

Subscriptions2
  • Premium Monthly7 Days trial$0.991 Month
  • Premium Annual$4.991 Year

Questions

Is Period Tracker free?
Period Tracker is free to download, with in-app purchases available.
Is Red Diary free?
Red Diary is free to download, with in-app purchases available.
Do Period Tracker or Red Diary have ads?
Neither Period Tracker nor Red Diary shows ads.
Which is updated more often, Period Tracker or Red Diary?
Period Tracker ships an update every 3 weeks, and Red Diary every 3 days. Most recently, Period Tracker was updated on November 12, 2026 and Red Diary on November 5, 2026.

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