Comparison

Diary.Chat vs My Luna Flow

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

Head to head
About

Diary.Chat

This app helps you track your mood and thoughts with AI-powered insights and tailored prompts. Build a journaling habit with fun features and review daily summaries to understand your emotional patterns and improve mental well-being.

Highlights
  • Tailored journaling prompts
  • AI-driven mood and thought analysis
  • Daily summaries of emotional patterns
  • Gamified habit building (reminders, streaks, achievements)
  • Secure and private data storage
  • Voice recording and image support
Features
Read full description

TAILORED PROMPTS With tailored prompts, DiaryChat guides you to explore your feelings, making it more than just a daily journal, it's your personal mood tracker. AI INSIGHTS Get actionable insights from your AI journal that reveal patterns in your mood and thoughts, helping you improve your mental health. DAILY SUMMARIES Track your progress with DiaryChat daily summaries, which analyze your mood, emotions, and recurring themes in your daily journal. JOURNALING MADE FUN Build a daily journal habit with DiaryChat, where reminders, streaks, and achievements turn journaling into a rewarding experience. RESPECT PRIVACY Your reflections are private. Your journal entries, voice recordings, and images are stored securely. You can delete your data anytime.

About

My Luna Flow

Features
Read full description

Most cycle apps hand you a calendar. My Luna Flow gives you Luna: a companion who actually understands where you are in your cycle, and a promise that your data is never for sale. Not a dashboard. Someone who pays attention. ASK LUNA A confidant for the questions you'd be embarrassed to type into a search bar. She answers knowing what day of your cycle you're on, what you logged this week, and what you told her last month. Not generic advice. YOUR CYCLE, IN PLAIN LANGUAGE Where you are today and what's coming. Your phase, your energy, the days ahead. No jargon, no charts that need a manual. TRACK WHAT ACTUALLY SHOWS UP Mood, energy, cramps, sleep, skin, appetite. Log it in seconds. Luna ties it back to your cycle so the patterns surface on their own. A JOURNAL THAT LISTENS Write freely. Luna remembers, and brings your own words back to you when they matter again. MOVEMENT AND FOOD THAT FOLLOW YOUR ENERGY Workouts and meals matched to your phase instead of fighting it. Rest isn't something you have to earn. YOUR DATA IS YOURS ALONE This is the part cycle apps get wrong most often. - We never sell your data. Not to advertisers, not to insurers, not to data brokers. - No third-party trackers and no ad SDKs in this app. - Export everything you've logged, anytime, as a file you keep. - Delete your account and every entry with one tap. No questions, no retention. My Luna Flow is funded by subscriptions, not by your data. That's what makes the promises above possible. LUNA PRO - Unlimited conversations with Luna - Echoes, where she surfaces what you told her weeks ago, right when it matters again - Your Luna Score and full wellness breakdown - Mood patterns and symptom clusters across cycles - Every insight, every phase unlocked Coming to Pro: partner sharing, deeper pattern intelligence, and phase-specific rituals. SUBSCRIPTION Luna Pro is available as a monthly subscription, a yearly subscription, or a one-time lifetime purchase. Payment is charged to your Apple account at confirmation of purchase. Subscriptions renew automatically at the same price unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the end of the current period. Manage your subscription or turn off auto-renew in your Apple account settings after purchase. Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use (EULA): https://mylunaflow.app/terms Privacy Policy: https://mylunaflow.app/privacy My Luna Flow supports your wellbeing. It is not a medical device, and it does not diagnose or treat any condition. It is not a contraceptive. For medical decisions, please talk to a clinician.

Screenshots

Diary.Chat4 screens
My Luna Flow4 screens

Verdict

The call

The clearest difference is in-app purchases: Diary.Chat at none against My Luna Flow's 3. My Luna Flow's advantage is device support (3 vs 1). On price, update cadence, ads and iOS requirement 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. My Luna Flow sells 3 in-app purchases, starting at $9.99 per month. Diary.Chat asks for nothing beyond the download.

UpkeepUpdate frequency

Diary.Chat ships an update every 8 days, My Luna Flow fortnightly. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 7 level
Diary.Chat versus My Luna Flow: the parameters behind the verdict, then further details
ParameterDiary.ChatMy Luna Flow
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 8 days — betterFortnightly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.015.1 — better
Further details — not scored
Size4 MB68 MB
Age rating17+17+
DeveloperUnderscore LLCKevork Wakimian

In-app purchases

None

Diary.Chat

No in-app purchases

3 purchases

My Luna Flow

Subscriptions2
  • Luna Pro Monthly$9.991 Month
  • Luna Pro Annual$59.991 Year
One-time1
  • Luna Pro Lifetime$99.99

Questions

Is Diary.Chat free?
Diary.Chat is free to download, with no in-app purchases.
Is My Luna Flow free?
My Luna Flow is free to download, with in-app purchases available.
Do Diary.Chat or My Luna Flow have ads?
Neither Diary.Chat nor My Luna Flow shows ads.
Which is updated more often, Diary.Chat or My Luna Flow?
Diary.Chat ships an update every 8 days, and My Luna Flow fortnightly. Most recently, Diary.Chat was updated on October 30, 2026 and My Luna Flow on October 28, 2026.

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