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Secret Diary : with lock vs its rivals

Side-by-side comparison against Secret Diary : with lock's closest competitors: identity, store metrics, ratings & sentiment, and strategic intel.

Secret Diary : with lock
This App
Unicorn Diary (with password)
Nemesis
MiiBook Journal: Private Diary
Contender
Halo: Daily Journaling App
Contender
DayGram - One Line a Day Diary
Contender
MOODA
Contender
My Journal: Gratitude Diary
Peer
Question Diary
Peer
Diary Journal - With Lock
Peer
DrawMyToday - AI Picture Diary
Peer
Core Identity
DeveloperNawal AmallouZipoAppsnosukePerigeeEUIHYUNG JUNGAnalog Lab Corp.BlueLeaf TechPIONEHeyou Co., Ltd.CHANHO LEE
CategoryLifestyleUtilitiesLifestyleLifestyleLifestyleLifestyleLifestyleLifestyleLifestyleLifestyle
PlatformiOSAndroid, iOSAndroid, iOSiOSiOS, AndroidiOS, AndroidAndroidiOSiOSiOS
Store Metrics
Rating4.8 / 54.4 / 54.7 / 54.8 / 54.5 / 54.6 / 54.3 / 54.4 / 54.7 / 54.3 / 5
Ratings Count1121393241,1092305281961843676
PriceFreeFreeFreeFreeFreeFreeFreeFreeFreeFree
Release DateApr 10, 2020Nov 16, 2020Jul 18, 2023May 20, 2021Jun 12, 2015Jul 10, 2023Oct 29, 2025Jul 22, 2017Jun 16, 2021Aug 16, 2023
Last UpdatedAug 30, 2024Dec 29, 2024Mar 28, 2026May 7, 2026May 5, 2026Feb 9, 2026May 11, 2026Jan 19, 2026Jan 26, 2026Jun 7, 2026
Sentiment & Reviews
Sentimentexcellent---positive----terrible
Score85/100---82/100----10/100
Praises
  • Secure password protection provides peace of mind for users documenting private daily thoughts
  • Simple and clean interface design makes daily journaling feel accessible for new users
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  • Minimalist design and clean interface foster a calming experience for daily journaling habits
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Complaints
  • Paywall restrictions on essential security features like biometric authentication frustrate long-term users
  • Technical glitches in the passcode entry system occasionally prevent users from accessing their journals
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  • Inconsistent PDF export quality makes archived entries difficult to read or print
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  • Aggressive advertisement frequency prevents users from accessing the core daily journaling and illustration features
  • Lack of creative drawing tools forces reliance on automated illustration features for daily entries
Requests
  • Expanded free access to customization tools and biometric security options for all users
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  • Expanded media support including color photos and multiple image attachments per entry
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Strategic Intel
Strengths
  • Local encryption provides a high-trust environment for private data
  • Minimalist UI lowers the barrier to entry for new users
  • Unicorn-themed comic collection functions as a unique engagement hook
  • Biometric security provides a baseline trust mechanism
  • High-frequency push notifications sustain daily habit formation
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  • E-Ink aesthetic reduces cognitive load for daily writing
  • One-time purchase model builds long-term user trust
  • Privacy-first design via biometric and passcode locks
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  • Annual reflection mechanism creates a unique emotional hook for long-term retention
  • Cloud-sync architecture enables multi-device access
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  • Generative AI visual output provides a personalized creative record
Weaknesses
  • Biometric security gated behind a paywall drives negative sentiment
  • Passcode keypad glitches occasionally prevent user access
  • Premium tier at $4.99/week sits above the category median
  • Lack of PDF export limits long-term memory preservation
  • 0.16 rating gap between iOS and Android platforms
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  • PDF export legibility issues reported by users
  • Limited font scaling hinders accessibility for power users
  • Application instability during export tasks
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  • Manual daily input requirement creates high friction
  • Lack of monetization limits development resources
  • No AI-driven synthesis of historical entries
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  • Aggressive ad frequency blocks core utility
  • Lack of manual drawing tools limits creative expression
Pricingsubscriptionfreemiumfreefreefreemiumfreefreefreefreefree
MomentumZombieZombieActive-MaintenanceActive-Zombie-Maintenance
Update Cadence1 versions2 versions, ~305d avg5 versions-2 versions, 1 majors/6mo, ~3d avg5 versions-5 versions, ~383d avg-1 versions

Compare Secret Diary : with lock head-to-head

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with editorial review, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Secret Diary : with lock, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

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