Comparison

Caffeine Clock vs Milksy

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

Head to head
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 sleep better. See exactly when today's coffee wears off. 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. Tuned to you A quick setup captures your habits and sensitivity, and you can adjust your personal caffeine half-life at any time in Settings, so the curve matches how your body actually clears caffeine. 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 limit that fits your routine, whether that is the commonly cited 400 mg for adults or the 200 mg guideline many people follow during pregnancy. Get timely reminders before you overdo it. Apple Health Send every logged drink to Apple Health so your caffeine sits next to your sleep and the rest of your health data. 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.

About

Milksy

Features
Read full description

Milksy is a calm, simple baby tracker for the first months. Log in seconds • Bottle feeds with amount and time • Breastfeeding with a left/right timer that keeps running when you close the app • Diapers: wet, dirty or dry in one tap • Sleep, pumping, and medication or vitamins See the pattern • One clear timeline for every day • Trends for feeds, volume, diapers and sleep • Rhythm cards show how far apart feeds usually are: a look back, never a prediction Share with your partner • Invite a partner with iCloud and keep one shared timeline • Feed reminders and Live Activities Yours to keep • Export and restore backups • Milestones along the way Milksy is a logging tool, not medical advice. Talk to your pediatrician about your baby’s health.

Screenshots

Caffeine Clock4 screens
Milksy4 screens

Verdict

The call

The clearest difference is in-app purchases: Milksy at none against Caffeine Clock's 2. Milksy also leads on device support (3 vs 1). Caffeine Clock's advantage is update cadence (weekly vs fortnightly) and iOS requirement (16.4 vs 18.0). On price and ads 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. Caffeine Clock sells 2 one-off in-app purchases. Milksy asks for nothing beyond the download.

UpkeepUpdate frequency

Caffeine Clock ships an update weekly, Milksy fortnightly. The most recent releases landed on November 4, 2026 and November 6, 2026 respectively.

Scorecard4 real differences · 6 level
Caffeine Clock versus Milksy: the parameters behind the verdict, then further details
ParameterCaffeine ClockMilksy
PriceFreeFree
Rating4.7 (28 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings28 — better—
Update frequencyWeekly — betterFortnightly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS16.4 — better18.0
Further details — not scored
Size121 MB10 MB
Age rating4+4+
DeveloperANTONIN WINGENDERDAVOR BABIC

In-app purchases

2 purchases

Caffeine Clock

One-time2
  • Remove ads$4.99
  • Remove Ads$9.99
None

Milksy

No in-app purchases

Questions

Is Caffeine Clock free?
Caffeine Clock is free to download, with in-app purchases available.
Is Milksy free?
Milksy is free to download, with no in-app purchases.
Do Caffeine Clock or Milksy have ads?
Neither Caffeine Clock nor Milksy shows ads.
Which is updated more often, Caffeine Clock or Milksy?
Caffeine Clock ships an update weekly, and Milksy fortnightly. Most recently, Caffeine Clock was updated on November 4, 2026 and Milksy on November 6, 2026.

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