| Core Identity |
| Developer | Jatisari Inovasi Studio | Gunia UG (haftungsbeschränkt) | YunaSoft Inc. | Saturn Technologies Inc. | TinyWork Apps | Fit Tech | Kakao Corp. | Andrew Sampson | SACHIN SABU | UWV |
| Category | Productivity | Productivity | Productivity | Productivity | Productivity | Productivity | Social Networking | Productivity | Productivity | Productivity |
| Platform | Android | iOS, Android | iOS | Android, iOS | Android | Android | iOS, Android | iOS, Android | iOS, Android | Android, iOS |
| Store Metrics |
| Rating | 4.5 / 5 | 4.9 / 5 | 3.6 / 5 | 4.7 / 5 | 4.1 / 5 | 4.5 / 5 | 2.1 / 5 | 0.0 / 5 | 4.8 / 5 | 4.9 / 5 |
| Ratings Count | 12,351 | 1,515,291 | 1,437 | 67,607 | 8,882 | 10,490 | 20 | 0 | 32 | 28 |
| Price | Free | Free | Free | Free | Free | Free | Free | Free | $0.99 | Free |
| Release Date | Dec 21, 2012 | May 26, 2016 | Nov 5, 2014 | Mar 2, 2019 | May 26, 2016 | Jun 20, 2020 | May 12, 2015 | Sep 25, 2023 | Dec 10, 2016 | Aug 23, 2020 |
| Last Updated | Apr 5, 2026 | Dec 12, 2025 | Apr 11, 2026 | Apr 13, 2026 | May 6, 2026 | Jan 20, 2026 | Apr 27, 2026 | Jan 14, 2024 | Jul 15, 2022 | May 7, 2026 |
| Sentiment & Reviews |
| Sentiment | positive | mixed | negative | negative | - | - | mixed | positive | - | - |
| Score | 85/100 | 45/100 | 25/100 | 35/100 | - | - | 55/100 | 65/100 | - | - |
| Praises | - Localized holiday tracking
| - Deeply granular configuration options allow users to tailor every aspect of their calendar experience
| - Visual calendar widget design provides a clear overview of daily schedules for long-term users
| - High utility for students tracking daily class schedules and lunch periods
- Social connectivity features help students identify peers in shared classes
| - | - | - Consolidated business management tools
| - The online room feature provides a simple and effective way to conduct remote backlog refinement sessions
- Customization options for numbering conventions allow teams to tailor the estimation process to their specific needs
| - | - |
| Complaints | | - Critical data loss and disappearing events reported by users following the latest platform updates
| - Aggressive full-screen advertisements interrupt core scheduling workflows and frustrate long-term paying users
- Critical data loss events erase years of saved calendar entries without user intervention
| - Frequent schedule data loss and synchronization errors disrupt daily student usage
- Forced OS requirements prevent students with older hardware from accessing schedules
| - | - | - UI regressions and notification failures
| - Inconsistent feature parity between mobile platforms prevents teams from using private rooms across mixed device environments
- Excessive mobile data consumption during background activity leads to unexpected usage spikes for some users
| - | - |
| Requests | - Cross-device synchronization
| - Granular font scaling and layout options to improve readability in month-at-a-glance views
| - One-time purchase option to remove advertisements instead of recurring subscription models
| - Expanded support for middle school and diverse block schedule configurations
| - | - | - | - Dark mode support is requested to improve visual comfort during extended use in low light environments
| - | - |
| Strategic Intel |
| Strengths | - Localized French holiday library functions as a regional distribution barrier
- Simple UI design reduces the learning curve for casual users
| - Direct sync engine provides granular control over event metadata
- Local database search offers faster historical access than cloud-only rivals
| - High-density widget layouts provide faster glanceable access than full-featured competitors
- Regional lunar calendar support secures niche user segments
| - 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
| - | - | - Kakao ecosystem integration provides a distribution barrier against generalist CRM tools.
- AI-assisted messaging reduces manual labor for store owners.
- Centralized revenue tracking via Kakao Pay increases platform stickiness.
| - Gamified interaction triggers (Shake to Reveal) increase repeat usage
- Persistent historical data library (Scrum Baseline) creates switching costs
| - | - |
| Weaknesses | - No cloud-sync functionality forces manual data management
- Ad-supported model lacks premium utility for power users
| - Critical data loss post-update erodes user trust
- Notification failures cause missed appointments
- Settings interface is overly complex for new users
| - Unskippable full-screen ads interrupt core scheduling workflows
- Critical data loss events after OS updates
- Widget rendering failures on modern operating systems
| - Persistent schedule data loss requires manual re-entry
- Authentication failures via mobile number block user access
- Restrictive OS requirements alienate students on older hardware
| - | - | - 2.15 iOS rating indicates severe post-update friction.
- UI regressions in the latest release disrupt core operational workflows.
- Notification failures erode the daily active habit.
| - Missing private rooms on iOS creates a 0.7★ platform rating gap
- Excessive background data usage triggers uninstalls
- Dated UI animations contribute to perceived sluggishness
| - | - |
| Pricing | free | paid | subscription | free | free | free | freemium | freemium | free | free |
| Momentum | Maintenance | Maintenance | Intense | Intense | - | - | - | Zombie | Steady | Intense |
| Update Cadence | 1 versions, 1 majors/6mo | 2 versions, 1 majors/6mo, ~88d avg | 5 versions | 5 versions | - | - | - | 2 versions, ~469d avg | 5 versions | 5 versions |
