| What it does | Free calculators for sleep, mental wellbeing, recovery, fitness, nutrition and healthy living
| Free online digital clock with seconds, timer, stopwatch, and alarm
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
| All tools are free with no subscription or payment required.
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| Key features | - Sleep Cycle Calculator for planning bedtimes based on 90-minute cycles
- Bedtime Calculator to find sleep time based on wake-up time and duration
- Wake-Up Time Calculator based on bedtime and sleep cycles
- Sleep Debt Calculator to estimate missed sleep over a week
- Caffeine Half-Life Calculator to estimate caffeine remaining in body
- How Much Sleep Do I Need Calculator with age-based estimates
- 20 calculator hubs across Sleep, Mind, Body, Family and Lifestyle categories
- Transparent formulas showing the math behind each result
- Evidence-based references citing primary sources
- Editorial and clinical review for sensitive health tools
| - Digital clock with seconds and date display
- Multiple display styles: minimal, flip, analog, scenic
- Fullscreen mode for classroom or second screen
- Countdown timer
- Stopwatch with lap support
- Online alarm with custom sounds
- World clock for multiple time zones
- Meeting time planner comparing working hours
- Pomodoro timer
- Customizable display options and themes
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| What makes it different | - Private calculations in browser with no account required or personal data selling
- Transparent formulas and methodology for every calculator
- Evidence-based content citing primary sources not rewrites
- Regularly updated formulas with versioning and review dates
| - Completely free with no account required
- Works on all devices without installation
- No promise of alarm accuracy after closing browser
- Settings persist in browser with export option
- Accurate to device time with timezone customization
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 17 ● no change since last check | 23 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 7 |
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| Citation Flow (Majestic) | 10 | 25 |
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| Referring domains (Majestic) | 16 | 75 |
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WowSleepCalculator
Clockbeam