Comparison

MumuFit 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

MumuFit

Features
Read full description

MumuFit is your intelligent companion for period tracking, hormonal health, and cycle-based wellness. Backed by AI, MumuFit helps you understand and predict your cycle patterns, track symptoms, moods, and lifestyle habits, and receive insights tailored to your body. Free Features: - Onboarding experience to understand the app’s benefits - Privacy-focused — your data stays yours Premium Features (Subscription Required): - Smart Period Calendar & Symptom Logging - Mood & Activity Tracking - AI Chat Assistant for personalized health insights - Cycle Insights & Trend Analysis - Meal Planning based on your menstrual phase Subscription required after onboarding to unlock full access to cycle tracking, health insights, and personalized features. Built for people who menstruate, MumuFit empowers you to tune in to your body’s rhythms and take control of your reproductive health journey. Terms of Use: 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

MumuFit4 screens
Red Diary4 screens

Verdict

The call

MumuFit and Red Diary are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. MumuFit sells 1 in-app purchase, starting at $3.99 per month 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

MumuFit ships an update daily, Red Diary every 3 days. Both last shipped on October 16, 2026.

ScorecardNo meaningful differences
MumuFit versus Red Diary: the parameters behind the verdict, then further details
ParameterMumuFitRed Diary
PriceFreeFree
Rating—5.0 (9 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—9 — better
Update frequencyDaily — betterEvery 3 days
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS16.6 — better17.6
Further details — not scored
Size45 MB8 MB
Age rating4+12+
DeveloperBen PolleyRUBINS DORMEUS

In-app purchases

1 purchases

MumuFit

Subscriptions1
  • MumuFit Monthly Membership$3.991 Month
2 purchases

Red Diary

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

Questions

Is MumuFit free?
MumuFit 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 MumuFit or Red Diary have ads?
Neither MumuFit nor Red Diary shows ads.
Which is updated more often, MumuFit or Red Diary?
MumuFit ships an update daily, and Red Diary every 3 days. Most recently, MumuFit was updated on October 16, 2026 and Red Diary on October 16, 2026.

Other comparisons