Caffeine Curfew: Sleep Coach

Name: Caffeine Curfew: Sleep Coach
Rating: 4.6 (14 reviews)
Author: GARRETT MICHAEL WOODSIDE

Track Caffeine. Protect Sleep.

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

14 Ratings
Age Rating

9+
Years
Category

Health & Fitness
Developer

GARRETT MICHAEL WOODSIDE
Language

EN
English
Size

8
MB

Meet the new Caffeine Curfew: faster, smoother, and smarter, with personalized sleep protection, clearer insights, and seamless iPhone and Apple Watch tracking. 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

4.6

out of 5

14 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.

Developer Response
Thank you so much for the incredibly thoughtful review and the five star rating! I am absolutely thrilled to hear that you are loving the design and finding the app so easy to navigate.You have brought up some truly fantastic ideas regarding transparency and education. I completely agree that adding a learning section to explain caffeine metabolism and how the app calculates your personal statistics would be a huge benefit. Tying those explanations directly into the settings and adding an onboarding questionnaire are brilliant suggestions that would definitely help users feel more confident in their results.Building trust is incredibly important to me, and having the calculations reviewed in the future is a wonderful goal to strive for. Thank you again for taking the time to share such detailed and constructive feedback. It is users like you who will help make this app the best it can possibly be!
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.
Developer Response Apr 7
Thank you so much for the incredibly thoughtful review and the five star rating! I am absolutely thrilled to hear that you are loving the design and finding the app so easy to navigate.You have brought up some truly fantastic ideas regarding transparency and education. I completely agree that adding a learning section to explain caffeine metabolism and how the app calculates your personal statistics would be a huge benefit. Tying those explanations directly into the settings and adding an onboarding questionnaire are brilliant suggestions that would definitely help users feel more confident in their results.Building trust is incredibly important to me, and having the calculations reviewed in the future is a wonderful goal to strive for. Thank you again for taking the time to share such detailed and constructive feedback. It is users like you who will help make this app the best it can possibly be!
Nice app, responsive Dev
Mar 21
chris22138954g
The Dev was very responsive i came across the app inside of Reddit. The dev very kind and took the time to help me with my individual questions regarding fast metabolization of caffeine and how to tweak the app to get a better result on your own individual profile. This is definitely one of those apps that you keep on your phone, let it run in the background, it will remind you to track your caffeine intake, while Providing some tips and tricks you can use to lower the amount of circulating caffeine in your body. It’s really great for those who want to bio hack their sleep.

Developer Response
Thank you so much for the wonderful five star review! It was an absolute pleasure chatting with you on Reddit and helping you get the settings perfectly dialed in for your fast metabolization profile.Hearing that the app has become a daily tool for you to track your caffeine intake and biohack your sleep is exactly why I built it. I really appreciate your support and your incredibly kind words. Please feel free to reach out anytime if you have more questions or ideas!
Nice app, responsive Dev
Mar 21
chris22138954g

The Dev was very responsive i came across the app inside of Reddit. The dev very kind and took the time to help me with my individual questions regarding fast metabolization of caffeine and how to tweak the app to get a better result on your own individual profile. This is definitely one of those apps that you keep on your phone, let it run in the background, it will remind you to track your caffeine intake, while Providing some tips and tricks you can use to lower the amount of circulating caffeine in your body. It’s really great for those who want to bio hack their sleep.
Developer Response Apr 7
Thank you so much for the wonderful five star review! It was an absolute pleasure chatting with you on Reddit and helping you get the settings perfectly dialed in for your fast metabolization profile.Hearing that the app has become a daily tool for you to track your caffeine intake and biohack your sleep is exactly why I built it. I really appreciate your support and your incredibly kind words. Please feel free to reach out anytime if you have more questions or ideas!
Pretty Slick!
Apr 8
Simp4Jesus
Cool little app. I use it to regularly track caffeine intake daily as having coffee at the wrong time severely messes with my sleep. Mental illness makes this more of a problem for me than most, so it’s been a real godsend to be able to reliably know when I should quit drinking caffeine for the day. Big thanks to the dev ☺️

Developer Response
Big thank you to you! Cheers!
Pretty Slick!
Apr 8
Simp4Jesus

Cool little app. I use it to regularly track caffeine intake daily as having coffee at the wrong time severely messes with my sleep. Mental illness makes this more of a problem for me than most, so it’s been a real godsend to be able to reliably know when I should quit drinking caffeine for the day. Big thanks to the dev ☺️
Developer Response Jun 10
Big thank you to you! Cheers!
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!

What’s New in Version 1.9 - New and improved Sleep Calendar - Smoother, faster Sleep Score experience - More responsive physiology controls - Improved scrolling and overall performance - Enhanced stability across iPhone, Apple Watch, and widgets - General refinements and bug fixes

Version 1.9 Jun 11

Data Not Collected

The developer does not collect any data from this app.

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Accessibility

Information

Seller: GARRETT MICHAEL WOODSIDE
Size: 8 MB
Category: Health & Fitness
Compatibility: Requires iOS 17.6 or later.

iPhone
Requires iOS 17.6 or later.

iPad
Requires iPadOS 17.6 or later.

Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.

Apple Vision
Requires visionOS 1.3 or later.

Apple Watch
Requires watchOS 26.0 or later.
Languages: English
Age Rating: 9+

9+

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Contains
Health or Wellness Topics
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