Caffeine Curfew

Name: Caffeine Curfew
Rating: 4.8 (6 reviews)
Author: GARRETT MICHAEL WOODSIDE

Track Caffeine Decay for Sleep

Free · In‑App Purchases · Designed for iPad

6 Ratings
Ages

9+
Years
Category

Health & Fitness
Developer

GARRETT MICHAEL WOODSIDE
Language

EN
English
Size

3
MB

Stop guessing and start sleeping. Caffeine Curfew uses Apple Intelligence to predict exactly when your system is clear for deep, restorative rest tonight. Stop guessing if it’s too late for coffee. Know the answer. Most trackers just count cups. Caffeine Curfew models the biological half-life of every milligram you drink to predict exactly when your body will be ready for sleep. Caffeine doesn’t disappear when you finish your drink. It decays slowly over 5–8 hours. A 4 PM espresso can leave you chemically awake at midnight. Caffeine Curfew reveals this hidden "active caffeine" level so you can protect your sleep quality, avoid insomnia, and wake up rested. MEET LEO: YOUR AI SLEEP STRATEGIST Powered by Apple Intelligence (on supported devices), Leo is your witty, data driven sleep coach. He doesn't just show you numbers; he gives you the brutal truth about your habits. • "You're over budget." • "One more espresso will ruin your deep sleep." • "You're clear for takeoff." Leo analyzes your intake against your custom bedtime to give you a personalized "Safe" or "Critical" status instantly. SCIENCE BACKED FEATURES • Real-Time Half-Life Decay: Watch your active caffeine levels drop in real time. • Sleep Risk Analysis: Know your projected bedtime status before you take that first sip. • Custom Physiology: Adjust your personal metabolism rate (half-life) and sensitivity threshold. • Smart Pre Sets: Log generic drinks or scan barcodes with a tap. BUILT FOR THE APPLE ECOSYSTEM • Live Activities & Widgets: Monitor your decay right from your Lock Screen or Dynamic Island. • Apple Watch App: Log drinks and check your "Active Mg" from your wrist. • Siri & Shortcuts: "Hey Siri, log an espresso." • Apple Health Sync: Seamlessly reads your sleep data to fine tune your nightly curfew. WHY CAFFEINE CURFEW? Whether you are an athlete optimizing recovery, a student pulling all nighters, or just someone tired of staring at the ceiling, clarity is the cure. This isn’t just a timer; it’s a biological fuel gauge for your brain. Download Caffeine Curfew and master your energy today. Privacy Policy: https://garrettmichae1.github.io/CaffeineCurfew/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Data Sources: This app uses food product data from Open Food Facts, available under the Open Database License (ODbL). Source: https://world.openfoodfacts.org License: https://opendatacommons.org/licenses/odbl/1-0/

Ratings & Reviews

4.8

out of 5

6 Ratings

Amazing job, with a couple suggestions.
Feb 4

JM Soul
I want to start by praising you for creating a beautifully designed app. The UI is genuinely pleasant to look at, and the UX is straightforward, intuitive, and easy to navigate. Everything feels thoughtfully laid out, which makes the app enjoyable to use.I will be upfront in saying that I do not fully understand the physiology behind how the human body metabolizes caffeine, including factors like timing, dosage, sex, weight, height, and other variables. I am hoping that you do, and the app certainly gives that impression. However, as a user, I currently have no way to understand or verify how these calculations are being made.It would be extremely helpful to have some kind of learning or education section that explains how caffeine metabolism works in general, as well as how your algorithm determines the statistics it displays. This could also tie directly into the settings area, especially sections like Personal Physiology, Sleep Interference Threshold, and Daily Goals, by helping users understand what those options mean and how adjusting them affects outcomes.It may be best to assume that most users do not have a strong background in this topic. One idea could be a short onboarding questionnaire that users fill out, allowing the app to automatically configure these settings based on relevant physiological variables. This would reduce confusion and increase confidence in the accuracy of the results.Down the road, it could also be valuable to have the underlying calculations reviewed by an independent third party and to make the results of that review transparent to users. Even a high-level validation would go a long way in building trust and credibility around the algorithm.Overall, you are off to a wonderful start. I strongly encourage you to continue your great work. I can easily see this app becoming genuinely useful to a wide range of people.
Amazing job, with a couple suggestions.
Feb 4

JM Soul

I want to start by praising you for creating a beautifully designed app. The UI is genuinely pleasant to look at, and the UX is straightforward, intuitive, and easy to navigate. Everything feels thoughtfully laid out, which makes the app enjoyable to use.I will be upfront in saying that I do not fully understand the physiology behind how the human body metabolizes caffeine, including factors like timing, dosage, sex, weight, height, and other variables. I am hoping that you do, and the app certainly gives that impression. However, as a user, I currently have no way to understand or verify how these calculations are being made.It would be extremely helpful to have some kind of learning or education section that explains how caffeine metabolism works in general, as well as how your algorithm determines the statistics it displays. This could also tie directly into the settings area, especially sections like Personal Physiology, Sleep Interference Threshold, and Daily Goals, by helping users understand what those options mean and how adjusting them affects outcomes.It may be best to assume that most users do not have a strong background in this topic. One idea could be a short onboarding questionnaire that users fill out, allowing the app to automatically configure these settings based on relevant physiological variables. This would reduce confusion and increase confidence in the accuracy of the results.Down the road, it could also be valuable to have the underlying calculations reviewed by an independent third party and to make the results of that review transparent to users. Even a high-level validation would go a long way in building trust and credibility around the algorithm.Overall, you are off to a wonderful start. I strongly encourage you to continue your great work. I can easily see this app becoming genuinely useful to a wide range of people.
A must for coffee addiction
Jan 13

Ady
Love this app, now I can track my coffee intake and bot being worried about ruining my sleep! Love the Apple watch extension!

Developer Response
So glad it’s helping you find that balance! We really focused on making the Watch extension snappy so you could log and get back to your day, so it’s awesome to hear you’re getting use out of it. Sleep is everything, thanks for the support!
A must for coffee addiction
Jan 13

Ady

Love this app, now I can track my coffee intake and bot being worried about ruining my sleep! Love the Apple watch extension!
Developer Response Jan 15
So glad it’s helping you find that balance! We really focused on making the Watch extension snappy so you could log and get back to your day, so it’s awesome to hear you’re getting use out of it. Sleep is everything, thanks for the support!
Insightful information
Jan 8

TallDrink67
The app has provided insightful information about caffeine consumption and how it can impact your sleep.

Developer Response
Thanks for the feedback! Knowledge is half the battle when it comes to better sleep. If there are any other specific caffeine insights or data points you’d love to see in the future, definitely let us know.
Insightful information
Jan 8

TallDrink67

The app has provided insightful information about caffeine consumption and how it can impact your sleep.
Developer Response Jan 15
Thanks for the feedback! Knowledge is half the battle when it comes to better sleep. If there are any other specific caffeine insights or data points you’d love to see in the future, definitely let us know.

This update is all about streamlining your experience. • Focused Tracking: We have removed the water logging feature to simplify the interface and dedicate the app entirely to advanced caffeine decay modeling. • Tip Jar: Enjoying the app? We’ve added a way to support ongoing development directly in the Settings menu. Thanks for tracking with us!

Version 1.5

Jan 30

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

Information

Seller
Size
Category
Compatibility
Languages
Age Rating
In-App Purchases
Copyright

Developer Website

Privacy Policy

Supports

Family Sharing

Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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A Deterministic Logic Puzzle

Caffeine Curfew

Track Caffeine Decay for Sleep

Ratings & Reviews

Amazing job, with a couple suggestions.

A must for coffee addiction

Insightful information

What’s New

1.5

1.4

1.3

1.2

1.1

1.0

Version 1.5

App Privacy

Data Not Collected

Accessibility

Information

Supports

Family Sharing

More by GARRETT MICHAEL WOODSIDE

Find 9