| Core Identity |
| Developer | KANG LI | Sleep Tracker & Alarm Clock by Delightroom | 震 任 | Sleep Cycle AB | Sergey Astakhov | Appest Limited | SEEKRTECH CO., LTD. | InnerGrow | RV AppStudios LLC |
| Category | Utilities | Productivity | Utilities | Health & Fitness | Utilities | Productivity | Productivity | Productivity | Utilities |
| Platform | Android, iOS | Android, iOS | iOS, Android | iOS | iOS, Android | iOS, Android | Android, iOS | iOS, Android | iOS, Android |
| Store Metrics |
| Rating | 0.0 / 5 | 2.5 / 5 | 4.7 / 5 | 4.7 / 5 | 4.7 / 5 | 4.9 / 5 | 4.8 / 5 | 4.5 / 5 | 4.5 / 5 |
| Ratings Count | 0 | 17,643 | 243 | 22,456 | 15,359 | 42,467 | 48,115 | 362 | 3,279 |
| Price | USD0.99 | Free | $1.99 | Free | Free | Free | Free | Free | Free |
| Release Date | Dec 2, 2025 | Oct 25, 2021 | Jan 22, 2016 | Jul 23, 2009 | May 30, 2015 | Jun 19, 2013 | May 10, 2014 | Sep 15, 2025 | Jul 26, 2011 |
| Last Updated | Mar 9, 2026 | Dec 12, 2025 | Nov 10, 2022 | Apr 22, 2026 | Apr 20, 2026 | Mar 30, 2026 | Apr 29, 2026 | Apr 8, 2026 | Apr 2, 2026 |
| Sentiment & Reviews |
| Sentiment | negative | positive | mixed | negative | - | - | mixed | - | - |
| Score | 35/100 | 68/100 | 45/100 | 35/100 | - | - | 45/100 | - | - |
| Praises | - Core utility of the clock and timer functions provides reliable time management for daily tasks
| - Waking Effectiveness
- Mission-Based Challenges
| - Radio signal simulation provides reliable time synchronization for atomic watches in signal-dead zones
| | - | - | - Gamified focus mechanics provide effective motivation for students and professionals to reduce screen time
| - | - |
| Complaints | - Alarm reliability issues post-update cause missed wake-up times and silent notifications for critical alerts
- Increased interaction friction in the alarm setup flow frustrates users accustomed to simpler workflows
| - Intrusive Ads & Monetization
- Technical Reliability Issues
| - Alarm reliability issues post-update cause missed wake-up times and silent notifications for users
| - Aggressive Monetization & Ads
- Technical Bugs & Reliability
| - | - | - Subscription model implementation post-update alienates long-term users who previously purchased the app
| - | - |
| Requests | - Customizable alarm settings including the ability to disable snooze and select preferred alert sounds
| - | - Customizable alarm settings including jarring sound options and snooze control for better reliability
| - | - | - | - Granular control settings for pause functionality to accommodate different user attention spans
| - | - |
| Strategic Intel |
| Strengths | - Multi-device sync mechanism enables collaborative display use-cases
- Shareable web-URL architecture functions as a viral acquisition channel
| - Proprietary 'Prevent Turn Off' technology
- Diverse and high-friction dismissal missions
- Massive Android install base (2M+ ratings)
| - Audio-based signal transmission provides a hardware-agnostic solution for legacy timekeeping
- Wear OS integration increases switching costs for Android users
| - Established brand with 40M+ downloads
- Patented non-wearable tracking tech
- Advanced AI coaching (Luma/SleepGPT)
| - | - | - Gamified tree-planting creates a unique emotional brand connection
- Allow Lists provide functional utility for power users
| - | - |
| Weaknesses | - Alarm reliability failures post-update
- UI interaction complexity compared to legacy competitors
| - Poor iOS platform parity (2.5 star rating)
- Ad-delivery logic interfering with alarm functionality
- Reports of unauthorized subscription charges
| - Alarm reliability regressions post-update
- UI complexity increases friction for standard daily alarm tasks
| - Declining user sentiment
- Technical bugs (alarm/overheating)
- Aggressive monetization of paid users
| - | - | - Subscription model implementation post-update alienates legacy users
- Technical instability and login failures post-update
| - | - |
| Pricing | freemium | freemium | freemium | freemium | freemium | freemium | freemium | freemium | freemium |
| Momentum | Maintenance | Maintenance | Zombie | - | Intense | Intense | Active | Intense | Intense |
| Update Cadence | 5 versions, 1 majors/6mo, ~36d avg | 3 versions, ~56d avg | 5 versions, 1 majors/6mo, ~474d avg | - | 5 versions | 5 versions | 5 versions, 4 majors/6mo, ~4d avg | 5 versions | 5 versions |
