Comparison

AwakeSync vs Caffeine Clock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AwakeSync

This smart alarm app uses your Apple Watch to monitor sleep stages and wake you during light sleep. It offers personalized wake-up times, recurring alarms, and smart home integration for a more pleasant morning experience.

Highlights
  • Personalized wake-up during light sleep
  • Multiple and recurring alarms
  • Smart home device integration
  • Sleep stage monitoring
  • Siri Shortcuts integration
  • Companion iPhone app
Features
Read full description

AwakeSync – The Smart Alarm for a Better Wake-Up AwakeSync is the ultimate smart alarm for Apple Watch, designed to wake you up gently during light sleep, making your mornings more pleasant and energized. Simply set your desired wake-up time and a flexible wake window, and AwakeSync will intelligently choose the optimal moment to wake you, ensuring you feel refreshed. Key Features: • Personalized Wake-Up: AwakeSync monitors your sleep stages and wakes you during light sleep for a smoother start to your day. • Multiple and Recurring Alarms: Set up alarms for different occasions and routines, with full support for custom repeat schedules. • Smart Home Integration: Automate your morning by connecting AwakeSync to your smart home devices, creating a more relaxing wake-up environment. Powered by a highly efficient, custom AI model, AwakeSync tracks your sleep without draining your battery. Simply wear your Apple Watch overnight, and let AwakeSync do the rest. The companion iPhone app allows you to manage your alarms, customize smart home automations, and even integrate with Siri Shortcuts to create your own personalized routines. With AwakeSync, you’re not just setting an alarm—you’re transforming your mornings.

About

Caffeine Clock

This app helps you track your caffeine intake and understand its impact on your sleep. It models caffeine absorption and half-life to provide a clear view of your current and projected levels, allowing you to plan your consumption for better rest.

Highlights
  • Caffeine absorption and half-life modeling
  • Real-time caffeine level tracking
  • Interactive home screen widgets
  • Sleep-aware insights and bedtime planning
  • Extensive drink database with custom options
  • Daily caffeine threshold alerts
Features
Read full description

Track your caffeine and improve your sleep. Caffeine Clock is a caffeine tracker that models absorption and half-life to estimate how much caffeine is in your system throughout the day. Log what you drink or eat, see how levels rise and fall, and plan your last cup so you can sleep with confidence. Accurate tracking with absorption rate Not just totals. Caffeine Clock models how quickly you absorb caffeine and how it declines (half-life), then estimates your level now and later. If you note how long you sipped that cappuccino, the curve updates accordingly. A clear, actionable dashboard An attractive graph shows your current level, projected decline, and how much caffeine you’ll have at any time. Long-press to scrub the timeline and reveal exact values. At a glance, know whether you’re in the clear - or whether another cup will push you past your comfort zone. Interactive Home Screen Widgets Monitor your stats without even opening the app. View your live caffeine curve and current mg count directly on your Home Screen. Need to log a refill? Use the quick-add widget to track your favorites with a single tap - keeping your data accurate with zero friction. Sleep-aware insights Set a target bedtime. If your projected level looks high by then, Caffeine Clock lets you know early—often before you even add a drink—so you can adjust your cut-off and protect tonight’s sleep. Thoughtful onboarding Start strong with a quick setup that captures your preferences and sensitivity. You can fine-tune everything at any time. 200+ drinks, plus your own Choose from a built-in database of coffees, teas, and energy drinks, or create custom drinks with your own sizes and mg. Fast logging means better tracking. Thresholds and gentle alerts Pick a daily caffeine threshold that fits your routine. Get timely reminders before you overdo it and suggestions that keep you on track. Private and fully offline No account, no signup. Your data stays on your device, with an option to transfer locally. Caffeine Clock works fully offline. Anytime, anywhere. Made for everyday routines Whether it’s espresso at 8, tea at 2, or an energy drink before a workout, Caffeine Clock shows how today’s choices affect tonight’s sleep—so you can enjoy what you love without second-guessing it. How it works - Log a drink from the 200+ library or use the quick-add widget. - The app models absorption and half-life to estimate your level over time. - Watch the live caffeine curve and countdown on the dashboard or Home Screen. - Set a bedtime and get informed if you may still be “too caffeinated” by then. Why a dedicated caffeine tracker? Caffeine affects everyone differently. A general health app won’t tell you when a 3 PM latte will still be in your system at 10 PM. Caffeine Clock focuses on one job: timing your intake for better days and better nights. Get started in minutes Install, finish the onboarding, log your first drink, and watch your caffeine curve come to life. Disclaimer Caffeine Clock provides estimates based on published half-life ranges and your inputs. It’s for informational purposes only and is not a medical device or a substitute for professional advice.

Screenshots

AwakeSync4 screens
Caffeine Clock4 screens

Verdict

The call

The clearest difference is review sentiment: Caffeine Clock at 80% against AwakeSync's 33%. Caffeine Clock also leads on rating (4.7 vs 3.4) and ratings volume (24 vs 5). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. AwakeSync sells 2 one-off in-app purchases and Caffeine Clock sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Caffeine Clock holds the better App Store score, 4.7 against 3.4. Both are backed by a comparable volume of ratings — 5 and 24 respectively. Written reviews point the same way: 33% of AwakeSync's written reviews are positive against 80% of Caffeine Clock's.

UpkeepUpdate frequency

AwakeSync ships an update every 2 weeks, Caffeine Clock weekly. The most recent releases landed on September 5, 2026 and September 16, 2026 respectively.

Scorecard3 real differences · 7 level
AwakeSync versus Caffeine Clock: the parameters behind the verdict, then further details
ParameterAwakeSyncCaffeine Clock
PriceFreeFree
Rating3.4 (5 ratings)4.7 (24 ratings) — better
Positive reviews33.3% of reviews80.0% of reviews — better
Number of ratings524 — better
Update frequencyEvery 2 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreeFree
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS17.016.4 — better
Further details — not scored
Size33 MB122 MB
Age rating4+4+
DeveloperCubeon Solutions UGANTONIN WINGENDER

Customer experience

AwakeSync

All ratings5 ratings
Positive40.0%
Neutral40.0%
Negative20.0%
Written reviews3 reviews
Positive33.3%
Neutral33.3%
Negative33.3%

Caffeine Clock

All ratings24 ratings
Positive91.7%
Neutral4.2%
Negative4.2%
Written reviews5 reviews
Positive80.0%
Neutral20.0%
Negative0.0%

In-app purchases

2 purchases

AwakeSync

One-time2
  • Buy me a coffee$1.99
  • Pro$8.99
2 purchases

Caffeine Clock

One-time2
  • Remove ads$4.99
  • Remove Ads$9.99

Questions

Is AwakeSync free?
AwakeSync is free to download, with in-app purchases available.
Is Caffeine Clock free?
Caffeine Clock is free to download, with in-app purchases available.
Which has better reviews, AwakeSync or Caffeine Clock?
Caffeine Clock is rated higher. AwakeSync averages 3.4 out of 5 from 5 ratings, while Caffeine Clock averages 4.7 from 24 ratings.
Do AwakeSync or Caffeine Clock have ads?
Neither AwakeSync nor Caffeine Clock shows ads.
Which is updated more often, AwakeSync or Caffeine Clock?
AwakeSync ships an update every 2 weeks, and Caffeine Clock weekly. Most recently, AwakeSync was updated on September 5, 2026 and Caffeine Clock on September 16, 2026.

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