Find your perfect caffeine cutoff for
better sleep, every night.
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See when to stop drinking caffeine to protect your sleep.
Cutoff Mode tells you if it’s still safe to have caffeine now, or if your ideal cutoff
time has already passed.
Planning Mode lets you schedule drinks and see if your full day's plan fits before
bedtime.
Tap the icon to switch modes.
Colors guide your outcome:
Tap Caffeine Chart to see your full curve. Tap the icon to reset the main form.
Everyone processes caffeine differently:
Enable Sleep Priority in Settings for extra protection.
Add drinks you've had or plan to have later:
Each drink affects your personalized cutoff.
LastSip helps you go beyond basic caffeine tracking:
Start using LastSip to sleep better tonight.
After you tap Start, you’ll see a quick personalization screen to improve accuracy.
You can always revisit this guide or change your preferences later in Settings.
Lowers your bedtime caffeine limit to 35mg for deeper, more protective sleep. Great if you're sensitive or optimizing recovery.
Set your own bedtime limit. Most people sleep best with 30–50mg of caffeine or less in their system at bedtime.
Sends a reminder 30 minutes before your cutoff time. Only triggers if you have a working future cutoff.
Adjusts your caffeine metabolism based on weight, lifestyle, and sensitivity for more accurate cutoffs.
Explore how LastSip calculates your results and what factors shape your caffeine cutoff time.
Have a suggestion, question, or bug to report? We'd love to hear from you.
Clears all saved data such as your custom drink list and metabolism profile, allowing you to start fresh.
Tip: Tap the ⚙️ gear icon in the corner to revisit these settings.
Clear your personalization settings?
This will reset your sleep profile and sensitivity.
Reset everything to default?
This will clear plans, preferences, and custom beverages.
You have a previously saved plan.
Would you like to load it now?
Delete your saved plan?
This cannot be undone.