Comparison

Hydria vs Caffeine Tracker

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

Head to head
About

Hydria

Features
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Drink enough water β€” finally. Hydria turns hydration into a habit you actually keep, wrapped in water we render ourselves: a Metal fragment shader that catches the light, refracts through the glass, and answers every log with a satisfying "sploosh." Most water apps nag you, then make you feel guilty. Hydria does the opposite β€” a calm coach that meets you on your iPhone, your Lock Screen, your Mac and your wrist, with a goal built around YOUR body and a tap-to-log so fast it never gets in your way. And one off day won't ruin your streak. WATER THAT IS RENDERED, NOT ANIMATED β€’ The liquid is computed on the GPU every frame by a shader we wrote β€” there is no video, no GIF and no animation file anywhere in the app. β€’ Tap the bottle: a ripple runs out across the surface and decays over about a second. β€’ It takes its colour from the drink you logged, and it degrades honestly β€” Reduce Motion gives you a still, correctly lit frame, and Low Power Mode switches to a lighter renderer to spare your battery. WHY HYDRIA β€’ A goal that's actually yours β€” calculated from your weight, activity, climate and schedule. β€’ Log in one tap β€” quick-add chips, custom amounts, or "Hey Siri, log water in Hydria." β€’ Streak Freeze (Premium) β€” a budget of forgiven days, so one off day doesn't reset your streak. β€’ Reminders that respect you β€” paced to your day, and quiet when you're already ahead. β€’ One app across iPhone, iPad, Apple Watch, Mac and Apple Vision Pro. On Mac it puts a drop and today's percentage right in the menu bar, with a click-to-log menu. β€’ No ads. Ever. No account, no sign-up β€” your data stays on your device and in your own iCloud. ALCOHOL COUNTS AGAINST YOU β€’ Not all drinks count the same: water 1.0, tea 0.95, coffee 0.80. β€’ Beer, wine and spirits count NEGATIVE β€” log a beer and today's total goes DOWN, just like real life. β€’ Calories and caffeine come from the same table, automatically. HEALTH CHALLENGES (PREMIUM) β€’ Take on a challenge with a friendly buddy cheering you on β€” Sober Streak with Barley the Bear, Ditch the Soda with Sunny the Sloth, Caffeine Curfew with Koa the Koala, Water Purist with Otis the Otter. β€’ They're abstinence goals scored against your real drink log, not just a counter. β€’ Finish a challenge and share a beautiful card to your Story β€” bragging rights included. START FREE Log water, coffee and tea, hit a personalized goal, set a daily reminder, see your week, sync to Apple Health and use the Apple Watch app β€” free, forever. No account needed. GO PREMIUM Health Challenges, Streak Freeze, every drink type with calories & caffeine, month and 90-day trends with your hydration score, smart adaptive reminders, all widgets, complications and Live Activity, achievements, and iCloud backup. Hydria Premium is an auto-renewable subscription, with a one-time Lifetime option if you'd rather pay once. The plans and the exact price for your country are shown in the app before you buy. Payment is charged to your Apple ID account at confirmation of purchase. A subscription renews automatically at the end of each period unless auto-renew is turned off at least 24 hours before the end of the current period; your account is charged within 24 hours prior to renewal. You can manage or cancel your subscription, and turn off auto-renew, in your App Store account settings after purchase. Lifetime is a one-time purchase, not a subscription. Terms of Use (EULA): https://lastoneparis.github.io/hydria/terms.html Privacy Policy: https://lastoneparis.github.io/hydria/privacy.html Stay hydrated. Feel the difference. Download Hydria.

About

Caffeine Tracker

Features
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How much caffeine is actually in your body right now? Coffy answers that with a live half-life curve β€” not a list of cups you drank and forgot about. WATCH IT LEAVE YOUR SYSTEM Every drink you log is plotted on a real metabolic curve. Coffy shows the milligrams still active in your body at this moment, and tunes the half-life to your own sensitivity: 4, 5 or 7 hours. YOUR CUT-OFF TIME Set your bedtime and Coffy works out the last safe cup of the day β€” the point after which you would still be above the 50 mg sleep threshold when your head hits the pillow. It also projects how many mg you will have left at bedtime, before you pour the next one. TAPER INSTEAD OF QUITTING COLD TURKEY Pick a starting point and a goal, and Coffy builds a weekly taper plan β€” around 50 mg less each week β€” then tracks you against this week's target. Cut back without the headaches. Pause or adjust the pace whenever life gets in the way. NUMBERS YOU CAN ACTUALLY TRUST Caffeine values come from USDA FoodData Central, the FDA and peer-reviewed studies, and every drink shows you its source. Espresso, americano, latte, cappuccino, cortado, macchiato, mocha, matcha, tea, cola and energy drinks are built in β€” add your own for anything else. WATER TOO Track glasses of water alongside your caffeine, with gentle reminders through the day. HISTORY THAT MEANS SOMETHING Week, month and year views, your daily average, how it compares with the period before, and how many days you went over your limit. Day streaks and badges for days under your limit and nights with no late cup. REMINDERS THAT RESPECT YOUR SLEEP A cut-off alert, water reminders and an evening check-in β€” each one switchable. APPLE HEALTH & CSV Sync your caffeine intake to Apple Health, and export everything to CSV whenever you want it. Coffy is not trying to make you quit. It is here so you can time it right: full energy when you need it, clean sleep when you want it. Payment & Subscription Information: - Payment is charged to your Apple Account at confirmation of purchase. - Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. - Your account is charged for renewal within 24 hours prior to the end of the current period. - You can manage your subscriptions and turn off auto-renewal in your account settings after purchase. - No refund is provided for the unused portion of a subscription. Privacy Policy: https://desing304.github.io/caffeine-tracker-legal/privacy.html Terms of Use: https://desing304.github.io/caffeine-tracker-legal/termsofuse.html

Screenshots

Hydria4 screens
Caffeine Tracker4 screens

Verdict

The call

The clearest difference is device support: Hydria at 5 against Caffeine Tracker's 2. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Hydria sells 4 in-app purchases, starting at $4.99 per 7 days and Caffeine Tracker sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 12, 2026 and September 30, 2026 respectively.

Scorecard1 real difference Β· 5 level
Hydria versus Caffeine Tracker: the parameters behind the verdict, then further details
ParameterHydriaCaffeine Tracker
PriceFreeFree
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, Mac, Apple Watch, Vision Pro β€” betteriPhone, iPad
Requires iOS17.016.4 β€” better
Further details β€” not scored
Size15 MB79 MB
Age rating4+4+
DeveloperHUGO ANATOLE PAUL MORICEAUEMIR YAVCIN

In-app purchases

4 purchases

Hydria

Subscriptions3
  • Weekly$4.997 Days
  • Monthly$9.991 Month
  • Yearly7 Days trial$29.991 Year
One-time1
  • Hydria Lifetime$49.99
3 purchases

Caffeine Tracker

Subscriptions2
  • Premium Weekly$3.997 Days
  • Premium Yearly3 Days trial$24.991 Year
One-time1
  • Lifetime Premium$39.99

Questions

Is Hydria free?
Hydria is free to download, with in-app purchases available.
Is Caffeine Tracker free?
Caffeine Tracker is free to download, with in-app purchases available.
Do Hydria or Caffeine Tracker have ads?
Neither Hydria nor Caffeine Tracker shows ads.
Which is updated more often, Hydria or Caffeine Tracker?
Hydria ships an update weekly, and Caffeine Tracker weekly. Most recently, Hydria was updated on October 12, 2026 and Caffeine Tracker on September 30, 2026.

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