Comparison

Caffeine Tracker vs Luid

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

Head to head
About

Caffeine Tracker

Track your caffeine intake and understand its impact on your sleep and health. Get personalized insights, set 'Last Call' reminders, and visualize your consumption trends with detailed charts and widgets.

Highlights
  • Log various caffeine sources
  • Predict caffeine elimination time
  • Set 'Last Call' caffeine reminders
  • Analyze caffeine's impact on sleep
  • Visualize caffeine decline over time
  • Customizable drinks with AI
  • Siri Shortcuts and widgets
Features
Read full description

Alyx is a silly way to track caffeine. Quickly log espresso, lattes or anything else and see how it affects your health, sleep or view other interesting stuff! It uses Apple Health to store your data privately, which means it also syncs with iCloud. Of course, you can log caffeine here. Aside from being a coffee, espresso, energy drink, or general caffeine tracker and journal, there are some interesting things it can do: - Figure out when your body will be caffeine free. - Discover how much caffeine will be in your body at bedtime. - Get your customized "Last Call" for caffeine every day, and set an alarm for it! - See how caffeine consumption impacts the amount of sleep you get. - View how caffeine will decline in your body over the next 12 hours. - See if your caffeine consumption has been trending up or down lately. - Tons of Siri Shortcuts. - Tons of widgets! - Create your own custom drinks, and have AI figure out the caffeine contents! - A Hall of Fame for...caffeine consumption? - Um, what else? Oh, tons of charts! So yeah, you can see how caffeine affects your sleep, overall health, see how much sleep you'll lose, and more. I don't know, it's just a fun app. Download it or don't. Love, Alyx -- SUBSCRIPTION & PREMIUM FEATURES -- Most of Alyx is completely free to use. There are premium features if you upgrade to The Caffeine Club, which includes every widget, adding your own custom drinks, several charts, and sleep forecast features. -- LEGAL -- · View our terms of service here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ · View our privacy policy here: https://alyxcaffeinetracker.com/privacy/ Subscriptions will be charged to your credit card through your iTunes account. Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. You will not be able to cancel the subscription once activated. Manage your subscriptions in Account Settings after purchase.

About

Luid

Features
Read full description

Luid is a clean and modern water and drink tracker designed to make daily fluid tracking simple, visual, and easy to maintain. Log water, coffee, tea, and supported drinks in seconds. Follow your daily progress, view your recent routine on a weekly chart, and review your drink history whenever you want. Luid helps you understand your everyday fluid habits without making tracking feel complicated. You can personalize your daily goal, preferred unit, quick-add amounts, reminders, and app appearance to match your routine. History tools make it easy to review, edit, filter, or remove entries when needed. Luid is designed with privacy in mind. Your drink entries, goals, reminders, settings, and local insights are stored on your device. Optional Apple Health support can save new water entries to Apple Health when you choose to enable it. Luid is built for everyday wellness tracking and habit awareness. It is not medical advice and is not intended to diagnose, treat, prevent, or cure any condition. Hydration needs vary from person to person, and excessive fluid intake can be risky. Some advanced features require a paid Luid Pro subscription. Luid Pro may unlock deeper insights, interactive charts, timing analysis, drink balance insights, reminder intelligence, calendar heatmaps, personal records, recap views, custom drinks, and additional reminder flexibility.

Screenshots

Caffeine Tracker4 screens
Luid4 screens

Verdict

The call

Caffeine Tracker and Luid are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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 Tracker sells 4 in-app purchases, starting at $1.99 per month and Luid sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Caffeine Tracker ships an update every 5 days, Luid weekly. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

ScorecardNo meaningful differences
Caffeine Tracker versus Luid: the parameters behind the verdict, then further details
ParameterCaffeine TrackerLuid
PriceFreeFree
Rating4.9 (40 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings40 — better—
Update frequencyEvery 5 days — betterWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS26.026.0
Further details — not scored
Size45 MB5 MB
Age rating4+12+
DeveloperDay Well Spent LLCAli Yigit

In-app purchases

4 purchases

Caffeine Tracker

Subscriptions3
  • Caffeine Club$1.991 Month
  • Caffeine Club Annual$9.991 Year
  • Caffeine Club Annual7 Days trial$9.991 Year
One-time1
  • Caffeine Club: Lifetime$24.99
2 purchases

Luid

Subscriptions2
  • Luid PRO Monthly$0.991 Month
  • Luid PRO Yearly$1.991 Year

Questions

Is Caffeine Tracker free?
Caffeine Tracker is free to download, with in-app purchases available.
Is Luid free?
Luid is free to download, with in-app purchases available.
Do Caffeine Tracker or Luid have ads?
Neither Caffeine Tracker nor Luid shows ads.
Which is updated more often, Caffeine Tracker or Luid?
Caffeine Tracker ships an update every 5 days, and Luid weekly. Most recently, Caffeine Tracker was updated on October 17, 2026 and Luid on October 10, 2026.

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