Comparison

Red Diary vs Sleepcoach.ai

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

Head to head
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

About

Sleepcoach.ai

Features
Read full description

Sleepcoach uses the science of sleep to help you sleep better. Most people know sleep matters. Few know what to actually do about it. Sleepcoach closes that gap with personalized, science-backed coaching built around your unique sleep biology. NEW: APPLE WATCH APP • Smart wake-up alarm: gentle haptics on your wrist, with a smart window that wakes you in light sleep • Sleep score, sleep stages (deep / REM / core) and sleep battery at a glance • Your next circadian step, bedtime countdown and daytime stress (from HRV) • Watch face complications: alarm, score + stages, sleep battery, stress, next step • Guided 4-7-8 and box breathing with haptic cues • Evening taps for wind-down and bedtime — no phone needed YOUR PERSONAL SLEEP SCHEDULE Tell Sleepcoach when you want to wake up, and it builds a full daily schedule around that: when to get morning sunlight, when to have your last coffee, when to start winding down, and when to be in bed — all timed to your chronotype and body clock. SMART DAILY NOTIFICATIONS Six personalized reminders at exactly the right moments: morning light, caffeine cutoff, wind-down start, and lights out. Not generic push notifications — yours, based on your wake time. MORNING LIGHT ADVICE The single most effective way to sleep better tonight is morning light exposure. Sleepcoach checks today's weather and tells you exactly how many minutes to spend outside. SLEEP DATA FROM APPLE HEALTH Connects to Apple Health to automatically import your sleep sessions, HRV, heart rate, blood oxygen, and more. Understand your trends without wearing extra devices. CHRONOTYPE QUIZ Discover whether you're a Lion, Bear, Wolf, or Dolphin — and learn what that means for your energy, focus, and ideal sleep window. ESPECIALLY USEFUL IF: - You wake up tired even after 8 hours - You're going through perimenopause or menopause and sleep has gotten harder - You want to understand your sleep patterns without complicated devices - You've tried sleep apps before but found them too generic SUBSCRIPTION Try Sleepcoach free for 7 days. After the trial, a subscription of $49.99/year is required to continue using premium features, billed via Apple In-App Purchase. Subscriptions automatically renew unless cancelled at least 24 hours before the renewal date. Manage or cancel in your Apple ID account settings. DISCLAIMER Sleepcoach is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. Always consult a qualified healthcare professional before making health or medical decisions. TERMS OF USE https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Red Diary4 screens
Sleepcoach.ai4 screens

Verdict

The call

The clearest difference is update cadence: Red Diary at every 3 days against Sleepcoach.ai's every 4 weeks. Sleepcoach.ai's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.6). On price, ads and in-app purchases 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. Red Diary sells 2 in-app purchases, starting at $0.99 per month and Sleepcoach.ai sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Red Diary ships an update every 3 days, Sleepcoach.ai every 4 weeks. Both last shipped on November 5, 2026.

Scorecard3 real differences · 7 level
Red Diary versus Sleepcoach.ai: the parameters behind the verdict, then further details
ParameterRed DiarySleepcoach.ai
PriceFreeFree
Rating5.0 (9 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings9 — better—
Update frequencyEvery 3 days — betterEvery 4 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, Apple WatchiPhone, iPad, iPod, Apple Watch — better
Requires iOS17.615.0 — better
Further details — not scored
Size8 MB21 MB
Age rating12+4+
DeveloperRUBINS DORMEUSUCI

In-app purchases

2 purchases

Red Diary

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

Sleepcoach.ai

Subscriptions2
  • sleepcoach.ai Pro7 Days trial$8.991 Month
  • sleepcoach.ai Pro7 Days trial$49.991 Year

Questions

Is Red Diary free?
Red Diary is free to download, with in-app purchases available.
Is Sleepcoach.ai free?
Sleepcoach.ai is free to download, with in-app purchases available.
Do Red Diary or Sleepcoach.ai have ads?
Neither Red Diary nor Sleepcoach.ai shows ads.
Which is updated more often, Red Diary or Sleepcoach.ai?
Red Diary ships an update every 3 days, and Sleepcoach.ai every 4 weeks. Most recently, Red Diary was updated on November 5, 2026 and Sleepcoach.ai on November 5, 2026.

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