What it fixes
Sound familiar?
“I can't tell if a 3 pm coffee will keep me up.”
With SipLog
With SipLog Pro, see how a drink would move the time you'll be sleep-ready before you log it.
“I've no idea how much caffeine I've had today.”
With SipLog
A live estimate of the caffeine in your system, worked out from its half-life, against your own daily guide.
“Logging every drink is a chore, so I stop.”
With SipLog
Tap a drink to log it, with Undo if you tap the wrong one, or log from a widget, Siri, Control Center or the Action button.
01
Check before that coffee
With Pro, pick a drink and see how much caffeine it would leave at bedtime before you log it.
- Your sleep-ready time, and how each drink changes it
- A free cut-off reminder before the last coffee that will wear off by bedtime
02
Count down to sleep
A Live Activity counts down to sleep-ready on your Lock Screen and in the Dynamic Island.
- Home Screen and Lock Screen widgets with caffeine now
- Log your usual drinks straight from the widget
03
See what's keeping you up
The sleep report uses sleep data from Apple Health to show how caffeine affects your sleep.
- Caffeine still active at bedtime
- When you usually have your last drink
- Sleep data is read only when you turn the report on, and never leaves your iPhone
Everything you drink, in one tap
A drink library
Coffees, teas, sodas and energy drinks, or enter any amount yourself.
Your usual order
Save your regular drink with its exact caffeine. (Pro)
Your own settings
Set your daily guide, bedtime, caffeine half-life and sleep-ready level.
Trends
Daily trends against your guide, plus month and year trends with Pro.
Apple Health and iCloud
Drinks are saved to Apple Health if you choose, and sync through iCloud.
Export
Export your history as a CSV file.
Free
- Log drinks in one tap
- Caffeine in your system now
- Your daily guide and cut-off reminder
- Widgets, daily trends and CSV export
SipLog Pro
A monthly or yearly subscription, with a free trial for new subscribers.
- Your sleep-ready time and the what-if preview
- The sleep report
- The Live Activity
- Month and year trends
- Save your own drinks
Private by design
Drinks go to Apple Health only if you choose, and sync with your own iCloud. Sleep data is read only for the sleep report, and never leaves your iPhone.
Read the privacy policyQuestions
How does SipLog estimate the caffeine in my system?
It adds up the drinks you log and reduces each one over time using caffeine's half-life. You can set your own half-life in the app.
What does “sleep-ready” mean?
The time when the caffeine left in your system falls below the sleep-ready level you choose. It's part of SipLog Pro.
Which drinks are included?
A library of coffees, teas, sodas and energy drinks. You can also enter any amount, and with Pro save your usual order with its exact caffeine.
Is SipLog free?
Logging, caffeine now, your daily guide, the cut-off reminder, widgets, daily trends and export are free. SipLog Pro is a monthly or yearly subscription, with a free trial for new subscribers.
Is this medical advice?
No. SipLog gives estimates for awareness. Talk to your doctor about caffeine and your health.
SipLog gives estimates for awareness. It isn't medical advice.
Have the coffee. Sleep anyway.
Know how much caffeine is still in you, and when it'll be gone.
iPhone · iOS 26 or later