Saturn Calendar vs its rivals

Side-by-side comparison against Saturn Calendar's closest competitors — identity, store metrics, ratings & sentiment, and strategic intel.

Core Identity
DeveloperSaturn Technologies Inc.Googleunorderly GmbHCoziINTSIG Information Co., LtdMicrosoft CorporationNotion Labs, IncorporatedSCALEUP YAZILIM HIZMETLERI
CategoryProductivityProductivityProductivityProductivityProductivityProductivityProductivityProductivity
PlatformiOS, AndroidAndroid, iOSiOSiOS, AndroidiOSAndroid, iOSAndroid, iOSAndroid, iOS
Store Metrics
Rating4.7 / 54.5 / 54.8 / 54.8 / 54.9 / 54.7 / 54.8 / 54.7 / 5
Ratings Count67,607129,715157,510388,2361,790,1191,035,36182,804115,628
PriceFreeFreeFreeFreeFreeFreeFreeFree
Release DateMar 2, 2019Mar 10, 2015Apr 9, 2020Dec 21, 2010Aug 28, 2010Jan 18, 2011Sep 14, 2017Mar 6, 2023
Last UpdatedApr 13, 2026May 4, 2026Mar 15, 2026Apr 20, 2026Apr 10, 2026May 4, 2026May 5, 2026Apr 8, 2026
Sentiment & Reviews
Sentimentnegativemixed-mixedmixedterriblenegativemixed
Score35/10045/100-55/10045/10015/10035/10048/100
Praises
  • High utility for students tracking daily class schedules and lunch periods
  • Social connectivity features help students identify peers in shared classes
  • Reliable scheduling and task management features keep daily routines organized for long-term users
-
  • Shared family calendar and grocery lists provide essential coordination for busy households
  • Ease of Use
  • Scan Quality
  • Cross-device synchronization allows users to access notes across multiple platforms for daily productivity
  • Relational database structure provides powerful organization for personal and professional knowledge management
  • Educational & Research Utility
Complaints
  • Frequent schedule data loss and synchronization errors disrupt daily student usage
  • Forced OS requirements prevent students with older hardware from accessing schedules
  • Post-update UI regressions and missing features frustrate users who rely on specific widget customizations
-
  • Severe performance lag and freezing during list entry following the latest update
  • Aggressive Monetization
  • Data Loss & Support
  • Critical synchronization failures and data loss incidents render the application unreliable for daily use
  • Frequent app crashes and UI freezing during text editing sessions on mobile devices
  • Misleading Advertising
  • Restrictive Free Tier
Requests
  • Expanded support for middle school and diverse block schedule configurations
  • Dynamic app icon that updates to show the current date of the month
-
  • Search functionality within the lists menu to quickly locate specific items
-
  • Improved stylus and pen tool support for handwriting recognition and better brush customization
  • Toggle switch to disable or hide AI features from the primary interface
-
Strategic Intel
Strengths
  • School-specific schedule logic functions as a high-switching-cost barrier for students
  • Social-discovery network effects drive organic acquisition within school environments
  • Group-calendar integration centralizes club and sports communication
  • Native Android integration replaces default assistant triggers
  • Workspace ecosystem network effects drive high switching costs
  • Gmail event extraction automates scheduling friction
-
  • Brand positioning entrenched in 'Mom's Choice' demographic
  • Shared-state architecture creates high user switching costs
  • Cross-platform accessibility via web and mobile
  • Massive 300M+ user base
  • 41-language OCR support
  • Advanced multi-format conversion (Excel, Word, PPT)
  • System-level Microsoft 365 integration drives enterprise adoption
  • Free unlimited sync lowers switching costs
  • Infinite canvas supports complex project workflows
  • Relational database engine enables complex knowledge management systems
  • Template library lowers barrier to entry for new users
  • Multi-model aggregation (Gemini, Claude, DeepSeek)
  • Aggressive ASO capturing GPT-5/6 search volume
  • Cross-platform support (Watch, Web, iOS)
Weaknesses
  • Persistent schedule data loss requires manual re-entry
  • Authentication failures via mobile number block user access
  • Restrictive OS requirements alienate students on older hardware
  • Premium tier exceeds category median
  • 0.7★ Android-iOS rating gap indicates platform-specific instability
  • Static app icon fails to display current date
-
  • Severe input lag and freezing post-update
  • Data synchronization failures causing list duplication
  • Android-iOS feature parity gap
  • Aggressive paywalling of legacy free features
  • Mandatory watermarks on free tier
  • Reports of data loss and poor support responsiveness
  • Critical sync failures post-update
  • 0.7-star rating gap between iOS and Android
  • Frequent read-only mode locks
  • Mobile app crashes during long editing sessions
  • Forced AI elements disrupt core UI
  • Severe 3-message daily limit for free users
  • Lack of OCR/PDF processing features
  • Misalignment between marketing ads and app functionality
Pricingfreefreemiumsubscriptionfreemiumsubscriptionfreemiumfreemiumsubscription
MomentumIntenseIntenseIntenseActiveActiveActiveActiveMaintenance
Update Cadence5 versions5 versions, ~10d avg5 versions5 versions, ~5d avg5 versions, 1 majors/6mo, ~6d avg5 versions, ~9d avg5 versions, ~5d avg3 versions, ~27d avg

Compare Saturn Calendar 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 Saturn Calendar, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Data licensed under CC-BY-NC 4.0