Rest & Rise

Fast, privacy-friendly tools for better sleep and focus

🔒 Local-only • No sign-in

Sleep Cycle Calculator

Calculate ideal bedtimes or wake times using 90-minute sleep cycles. Default sleep latency is 14 minutes.

I want to

Time

Sleep latency (minutes)

Average time it takes you to fall asleep.

Show cycles

Tip: Aim for 5–6 cycles (7.5–9 hours) when possible.

Nap Timer

Pick a preset or set a custom nap length. Includes optional sound + vibration on finish.

Custom length (minutes)

Finish sound

Vibrate (mobile)

⏱️ —:—

Caffeine Cutoff Calculator

Pick your target bedtime and we’ll suggest a last-caffeine time. Default window is 9 hours before bed. Adjust if you’re more/less sensitive.

Planned bedtime

Cutoff window (hours before bed)

Note: Caffeine half-life varies (~3–7h). If you’re sensitive or sleep is crucial, choose 10–12 hours.

Pomodoro Timer

Stay focused with work/break intervals. Default: 25/5 with a long break every 4 sessions.

Work (minutes)

Short break (minutes)

Long break (minutes)

Long break every (sessions)

📌 Idle • Session 0

⏳ —:—

🎯 Completed: 0

Privacy Policy

Last updated: August 11, 2025

We care about your privacy. This site is designed to be fast and privacy‑friendly:

No account required. All calculations (sleep cycles, timers, etc.) run locally in your browser.
Local storage only. Tool preferences (like sleep latency) may be saved to your device using localStorage so your settings persist. You can clear this anytime from your browser settings.
Email signup. If you enter your email to subscribe, it will be sent to our email provider solely for delivering newsletters and product updates. You can unsubscribe at any time via the link in each email.
Links to other sites. We sometimes link to third‑party sites. Their privacy practices are their own; please review their policies.
Analytics. If enabled, we use lightweight, privacy‑respecting analytics to understand overall usage. We honor your browser’s Do Not Track setting.

If you have questions or requests (including data access/deletion related to the newsletter), contact us via the site’s contact method.

Affiliate Disclosure

Some links on this site are affiliate links. If you click and make a purchase, we may earn a commission at no additional cost to you. We only recommend products or services we believe are genuinely useful (e.g., books, sleep tools, productivity apps). These commissions help keep the site free.

General Disclaimer & Liability Notice

Informational/entertainment purposes only. The tools and content on this site are provided “as is” for general information and entertainment. They are not medical advice and do not replace professional guidance from a physician or qualified expert.

No warranties. We make no guarantees about accuracy, reliability, or availability. Calculators and timers may be affected by your device, browser, background restrictions, muted tabs, Doze/low‑power modes, or system clocks.
Not for critical uses. Do not rely on these tools where failure could cause harm (e.g., medical needs, safety‑critical alarms, legal or financial decisions).
Use at your own risk. By using this site, you accept full responsibility for any actions taken and agree we are not liable for any damages, losses, or consequences arising from use or inability to use the site.
Test first. If timing matters, test alarms/timers on your device before relying on them. Keep the tab active and your device awake if needed.

By continuing to use this site, you agree to these terms.