Bedtime Reminder blog

Guides & comparisons

Honest comparisons, alternatives and how-tos from the Bedtime Reminder team.

Free Bedtime Reminder tools

• Best Nap Length CalculatorPlan the best nap length for your available window. Get a suggested nap start, alarm time and a warning if the window is too short.→
• Calories Burned Sleeping CalculatorEstimate calories burned during sleep, calories per hour and the share of a full day's resting burn. Add age, sex and height for a BMR comparison.→
• Melatonin Timing PlannerWondering how much melatonin should I take? Choose a target bedtime and reason to see the clock window used in studies and their published dose range, presented as reference rather than advice.→
• Night Shift Sleep Schedule PlannerPlan a repeatable sleep, nap and wake schedule around night shifts. The planner keeps your requested total sleep duration while showing the timing it used.→
• REM Sleep CalculatorEstimate where REM-heavy late-night sleep may fit in your schedule. Enter time asleep, sleep onset and wake-up time for a range, not a precise measurement.→
• Sleep Cycle CalculatorUse this sleep calculator to plan bedtimes or wake-up times around 4, 5 or 6 sleep cycles. Add the minutes you usually need to fall asleep.→
• Sleep Debt CalculatorCompare your usual sleep need with actual sleep from recent nights. See total sleep debt or surplus, a nightly breakdown and an optional gradual recovery target.→
• Sleep Efficiency CalculatorEnter time in bed and estimated time asleep to calculate sleep efficiency as a percentage and see the awake-time gap.→
• Sleep Needs CalculatorFind how many hours of sleep you need by age, see the recommended nightly range, and work back to a bedtime from your wake-up time.→
• Sleep TimerSet a sleep timer for 15 to 90 minutes or choose a custom duration. The low-glare countdown stays in your browser and can end with a gentle chime.→
• White Noise GeneratorGenerate continuous white, pink or brown noise in your browser. Play it while you sleep, adjust the volume and optionally set a timer with a gentle fade-out.→

• How long should a nap be? 20 or 90 minutes, not 30

  How long should a nap be? Take 10-20 minutes for alertness or 90 for a full cycle, skip the 30-minute nap, and learn the best time to nap.

  Sep 16, 2026 →

• How to wake up early: the 15-minute shift method

  How to wake up early by moving bedtime and wake time 15 minutes every few days, plus the morning light habit that locks each step into place.

  Sep 13, 2026 →

• Delayed sleep phase syndrome vs being a night owl

  Delayed sleep phase syndrome isn't the same as being a night owl. Here are the markers that separate them and what actually shifts a late body clock.

  Sep 10, 2026 →

• Revenge bedtime procrastination: why it happens and how to stop

  Revenge bedtime procrastination is delaying sleep to reclaim time your day took. How it differs from insomnia, and what actually stops the 11pm drift.

  Sep 7, 2026 →

• Sleep debt: how to calculate it and pay it back

  Sleep debt is a rolling two-week balance. Learn how to calculate yours, what a weekend lie-in really repays, and the multi-night plan that clears it.

  Sep 4, 2026 →

• Is 6 hours of sleep enough? What the evidence says

  Is 6 hours of sleep enough? For nearly every adult, no. What happens at 5, 6, 7 and 8 hours, the symptoms to watch for, and how to audit your own sleep.

  Sep 1, 2026 →

• What time should I go to bed? Work backward from wake time

  What time should I go to bed? Subtract your age-band sleep need and a 15-20 minute latency buffer from a fixed wake time, with worked examples.

  Aug 29, 2026 →

• How much deep sleep do you need, and how much REM sleep?

  How much deep sleep do you need? Roughly 13-23% of the night, plus 20-25% REM — here's what that works out to in hours for 6, 7 and 8-hour nights.

  Aug 26, 2026 →

• Stages of sleep: N1, N2, N3 and REM explained

  A guide to the stages of sleep: what N1, N2, N3 and REM each do, how long a sleep cycle really runs, and why the last hour of the night is mostly REM.

  Aug 23, 2026 →

• Circadian rhythm: how the body clock actually works

  Circadian rhythm explained: the ~24.2-hour body clock, the sleep pressure that runs alongside it, and the light cues that keep the two on time.

  Aug 20, 2026 →

• Sleep hygiene rules that actually work, ranked

  Which sleep hygiene rules hold up in research and which are folk advice, plus a 60-minute wind-down timeline and a printable checklist for tonight.

  Aug 17, 2026 →

• How to fix sleep schedule problems without an all-nighter

  How to fix sleep schedule problems the way the clock actually works: anchor your wake time, use morning light, and shift bedtime 15 minutes a night.

  Aug 14, 2026 →

• How much sleep do I need? Hours by age, newborn to 65+

  How much sleep do I need? The full age-banded table, newborn to 65+, with recommended, borderline and not-recommended hours, plus how to find your own.

  Aug 11, 2026 →

• Sleep schedule: how to set one and actually keep it

  A sleep schedule is a fixed wake time, a fixed bedtime, and the hours between. Here's how to pick yours, hold it within 30 minutes, and why regularity matters.

  Aug 8, 2026 →

• Best 9 One Sec Alternatives in 2026: Break Bad Habits Fast

  Compare 9 top one sec alternatives for iOS and Android. We evaluate app blocking methods, delay timers, Apple Watch support, and customization to reduce screen time.

  Jul 8, 2026 →

• Best 9 Monk Alternatives in 2026: Focus Without the Fuss

  Searching for monk alternatives? We compare 9 apps across platform availability, wearable support, and interruption logic to help you pick the right focus tool.

  Jul 8, 2026 →

• Best 8 Freedom Alternatives in 2026: Break Bad Habits Now

  Compare 8 freedom alternatives covering iOS, Android, Mac, and Apple Watch support. We evaluate blocking strictness, scheduling rules, and cross-device sync.

  Jul 8, 2026 →

• Best 9 Minimalist Phone Alternatives in 2026: Simplify Your

  Compare 9 minimalist phone alternatives across platform availability, wearable support, and customization depth to find the right focus tool for your needs.

  Jul 8, 2026 →

• Best 9 Forest Alternatives in 2026: Stay Focused, Not Just

  Compare 9 forest alternatives for iOS and Android, evaluating platform support, watch compatibility, and scoring rules to find the best focus timer for your workflow.

  Jul 8, 2026 →

• Best 9 Screenzen Alternatives in 2026: Tame Your Screen Time

  Compare 9 screenzen alternatives with details on platform support, blocking strictness, gamification, and wearable compatibility to find the right fit.

  Jul 8, 2026 →

• Best 8 Opal Alternatives in 2026: Cut Screen Time Smarter

  Compare 8 opal alternatives covering iOS, Android, and cross-platform support. We evaluate blocking strictness, scheduling flexibility, and Apple Watch integration.

  Jul 8, 2026 →

• Best 8 Jomo Alternatives in 2026: Reclaim Your Screen Time

  Discover the best jomo alternatives in 2026. We compare 8 screen time blockers across iOS, Android, and Apple Watch, evaluating blocking strictness, gamification, and scheduling flexibility.

  Jul 8, 2026 →

• Best 8 Appblock Alternatives in 2026: Focus Without the Lockdown

  Compare 8 appblock alternatives covering Android, iOS, and Wear OS support, scheduling rules, and strict vs. flexible blocking modes to find your ideal focus tool.

  Jul 8, 2026 →

• Best 9 Stayfree Alternatives in 2026: Break Your Phone Habit

  Compare 9 stayfree alternatives for Android and iOS in 2026. We evaluate screen time limits, app blocking rules, cross-device sync, and Wear OS support.

  Jul 8, 2026 →

• Best 9 Scrollguard Alternatives in 2026: Break Your

  Discover the best scrollguard alternatives with this detailed comparison of 9 apps. We compare platform support, Apple Watch compatibility, blocking rules, and streak features.

  Jul 8, 2026 →

• Best 9 Sleep Pact Alternatives in 2026: Better Bedtime

  Searching for sleep pact alternatives? We compare 9 apps across platform availability, watch support, accountability rules, and social features to find your fit.

  Jul 8, 2026 →

• Best 8 Screenbuddy Alternatives in 2026: Smarter Screen Time

  Compare 8 screenbuddy alternatives with cross-platform support, Apple Watch sync, and flexible scoring rules. Find the best fit for your screen time goals.

  Jul 8, 2026 →

• Best 9 No Scroll Alternatives in 2026: Break Your Doomscrolling

  Discover the best no scroll alternatives that replace infinite feeds with intentional tools. Compares platform support, watch compatibility, and blocking rules.

  Jul 8, 2026 →

• Best 8 Spool Alternatives in 2026: Apps That Actually Work

  Discover the best spool alternatives in 2026. We compare 8 apps across platform availability, Apple Watch support, reminder rules, and customization depth.

  Jul 8, 2026 →