Comparison

EviMoon 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

EviMoon

Features
Read full description

EviMoon is a private-by-design menstrual cycle tracker that respects your data. No account required, no cloud storage, and absolutely no ads. Your health data belongs to you. That's why EviMoon works entirely offline. All your sensitive information—cycle dates, symptoms, and notes—is stored locally on your device and encrypted. We cannot see your data, and we never sell it. Key Features: Private & Secure No login needed. Your data never leaves your phone unless you choose to export it. Lock the app with FaceID/TouchID for extra protection. Visual Cycle Tracking Beautiful, breathing gradient interface that changes with your cycle phases (Menstruation, Follicular, Ovulation, Luteal). Know your body at a glance. Smart Reminders Set discreet notifications for your period start, ovulation window, or contraceptive pills. Symptom & Mood Log Track how you feel daily. Monitor changes in mood, symptoms, and flow to better understand your body's rhythm. Zero Ads, Zero Spyware Enjoy a clean, calm experience without annoying pop-ups or hidden trackers. Download EviMoon today and take control of your cycle with complete peace of mind.

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

EviMoon4 screens
Red Diary4 screens

Verdict

The call

The clearest difference is update cadence: Red Diary at every 3 days against EviMoon's every 2 weeks. EviMoon's advantage is iOS requirement (13.0 vs 17.6). 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. EviMoon sells 2 in-app purchases, starting at $11.99 per 6 months 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

EviMoon ships an update every 2 weeks, Red Diary every 3 days. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

Scorecard2 real differences · 8 level
EviMoon versus Red Diary: the parameters behind the verdict, then further details
ParameterEviMoonRed Diary
PriceFreeFree
Rating—5.0 (9 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—9 — better
Update frequencyEvery 2 weeksEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS13.0 — better17.6
Further details — not scored
Size45 MB8 MB
Age rating17+12+
DeveloperIslambek Abdykarim UuluRUBINS DORMEUS

In-app purchases

2 purchases

EviMoon

Subscriptions2
  • EviMoon 6-Month Premium$11.996 Months
  • EviMoon Premium Yearly$22.991 Year
2 purchases

Red Diary

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

Questions

Is EviMoon free?
EviMoon 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 EviMoon or Red Diary have ads?
Neither EviMoon nor Red Diary shows ads.
Which is updated more often, EviMoon or Red Diary?
EviMoon ships an update every 2 weeks, and Red Diary every 3 days. Most recently, EviMoon was updated on October 9, 2026 and Red Diary on October 1, 2026.

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