Life & fun · alternatives · 2026
24 alternatives to Sleep Debt Calculator
Free sleep tools: 34 instant calculators covering sleep debt, cycles, caffeine, naps, and jet lag — all free, no signup required.
Sleep Debt Calculator is a free online tool with 34 calculators designed to help users understand their sleep patterns. It tracks sleep debt by comparing actual sleep to target sleep over seven nights, showing… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Sleep Debt Calculator launched in 2013; newer entries below may have overtaken it.
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2020 · sleepsources.com · its alternatives →
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Sleepagotchi▲342Gameify sleep to improve millions of lives
2022 · sleepagotchi.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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Sleep Tracking App to Monitor Your Sleep Cycle
2024 · shuteye.ai · its alternatives →
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User-friendly online calculator for an initial screening
2024 · sleepalora.com · 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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DebtMeltPro▲107Compare debt payoff strategies and become debt-free faster
Apr 2026 · debtmeltpro.com · 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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Free sleep tools to help you wake up refreshed
2025 · sleepcalculators.net · its alternatives →
- 12WP
2011 · waketimes.com · its alternatives →
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Track sleep debt and optimize daily recovery offline.
Aug 2026 · play.google.com · its alternatives →
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Stimly▲60Real-time caffeine metabolism curve and bedtime estimate
27d ago · stimly.app · its alternatives →
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Hi guys! I would love to show you Caffeine Clock 2.0, a tracker I made that shows you your caffeine levels now and in the future, helping you have undisrupted sleep by timing your caffeine better. A bit of context - as a guy who drinks a lot of caffeine, I wanted to make a good caffeine tracking app for a long time, since nothing I found at the time was sufficient. I wanted to make an app that would be easy to use, show you exactly when you’d have enough caffeine to not have your sleep disrupted, and could add all the drinks I usually drink, for free. After several iterations, I am now…
2025 · caffeineclock.app · its alternatives →
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Your Personal Sleep Calculator
Jul 2026 · sleeptimeoptimizer.com · its alternatives →
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A comprehensive, science based sleep optimization platform.
Jan 2026 · 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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Hi HN, I just launched Intermittent Fasting Calculator, a free, no‑signup web tool to plan your next meal and fasting window. Pick from popular methods (16:8, 14:10, 18:6, 20:4, OMAD) or set a custom fasting window (1–23 hrs), enter your last meal or desired next‑meal time, and get an instant, color‑coded 24‑hour timeline. Export results as text, image, or PDF. Works on mobile and desktop, with built‑in guidance on fasting methods and safety. I built this to simplify my own fasting schedule planning—no more mental math or clunky apps. I’d love to hear your thoughts on the UI, features, or…
2025 · intermittentfastingcalculator.org · its alternatives →
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Free sleep score, HRV & recovery calculators
Apr 2026 · sleepscorely.com · its alternatives →
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Find your perfect bedtime & wake time
2025 · navi-resources.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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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 →