Life & fun · alternatives · 2026
24 alternatives to I'm 15 and made a bedtime calculator with React JavaScript
A bedtime calculator built with React that helps users determine when to go to sleep based on sleep cycle science. The tool is designed for anyone looking to optimize their sleep schedule, though it was created by a… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. I'm 15 and made a bedtime calculator with React JavaScript launched in 2020; newer entries below may have overtaken it.
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Calculates optimal bed times based on sleep cycles
2015 · sleepopolis.com · its alternatives →
- 4WP
2011 · waketimes.com · its alternatives →
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Calculate when you should go to sleep based on REM cycles.
2020 · sleepsources.com · its alternatives →
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Sleep Formula▲139App to improve your sleep using CBT & sleep tracking
2021 · apps.apple.com · its alternatives →
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Fall asleep by watching JavaScript load. Contribute to sarusso/bedtime development by creating an account on GitHub.
Jan 2026 · github.com · its alternatives →
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JS/ReactJS simulation of A Million Times
2017 · clocks.80limit.com · its alternatives →
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I built Sleep Calculator to help people improve sleep quality by aligning with natural 90-minute sleep cycles. You can either: Enter your desired wake-up time to get ideal times to fall asleep, or Enter your bedtime to find optimal wake-up times.
2025 · openmagic-data.com · its alternatives →
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Stop Guessing, Start Resting
Jun 2026 · sleepytime.cc · its alternatives →
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Find your perfect bedtime & wake time
2025 · navi-resources.com · its alternatives →
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CalPal▲105I built this using React/Next.js. The parsing logic uses [library/custom regex]. Added Gemini API support so users can generate budget templates dynamically. No ads, just a tool.
Jan 2026 · trycalpal.app · its alternatives →
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Free sleep calculator and sleep cycle calculator to find your optimal bedtime and wake-up time. Calculate your REM sleep cycles for better rest and energy
2025 · sleepcalculators.org · its alternatives →
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Secrets of time: know your age instantly
2023 · play.google.com · its alternatives →
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Time, money, and CO2 you saved since you went remote
2022 · realworkfromanywhere.com · its alternatives →
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Best Time to Go to Bed and Wake Up
2022 · shuteye.ai · its alternatives →
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Free sleep tools to help you wake up refreshed
2025 · sleepcalculators.net · its alternatives →
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Plan better sleep, wake times and daily wellness
Jul 2026 · wowsleepcalculator.com · its alternatives →
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Would you like to wake up feeling more energetic? Sleep Calculator will show you the best time to sleep or wake up for a refreshed start to your day.
2025 · sleepcalculators.com · its alternatives →
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Slumber Bear▲99A tool for finding your perfect sleep cycle.
2019 · slumberbear.netlify.com · its alternatives →
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Wake up refreshed with science-backed sleep cycles timing
Apr 2026 · sleepcalculator.vip · its alternatives →
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Free, responsive tool to calculate your perfect sleep cycle.
Jul 2026 · io-sleep-calculator.blogspot.com · its alternatives →
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Your Personal Sleep Calculator
Jul 2026 · sleeptimeoptimizer.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →