Comparison

The Calorie Tracker vs Hydrabit

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

Head to head
About

The Calorie Tracker

This app helps you track your calorie intake, manage intermittent fasting schedules, and monitor your daily habits. It calculates macros, syncs with health data, and offers a community for support. Personalized plans and progress tracking are also included.

Highlights
  • Calorie and macro tracking
  • Intermittent fasting timer
  • Automatic step and activity syncing
  • Weight and progress photo logging
  • Daily to-do list
  • Community feed
  • Personalized calorie plans
Features
Read full description

OnTrack is a calorie counter, fasting timer, and habit tracker built into one app. Here's everything inside. CALORIE COUNTER Log meals by photo*, barcode*, or search. Calories and macros (protein, carbs, fat) are calculated for you, so logging takes seconds. FASTING TIMER Pick a fasting window (16:8, 18:6, OMAD, or set your own) and start your fast. The timer keeps running in the background and we'll send a notification when your eating window opens. STEP TRACKER Your steps sync from Apple Health automatically. See your daily count and how it stacks against your goal without typing anything. CALORIES BURNED Active calories from your workouts and daily movement pull in from Apple Health. Subtract them from what you ate to see your real net for the day. WEIGHT LOG Track your weight over time and watch the trend. A single morning number doesn't tell you much, but the trend does. PROGRESS PHOTOS Take a weekly photo and watch the change month by month. Each photo is paired with the weight you logged that day so the comparison stays honest. DAILY TO-DOS A short list every morning: log today's weight, start your fast, take this week's progress photo. Small actions, every day, that compound. COMMUNITY Post an update, ask a question, share a recipe, or just lurk. The feed is people working on the same things you are. PERSONALIZED PLAN Answer a few questions about your goals, height, weight, and activity, and we'll set your calorie target and macro split. Adjust any number any time. APPLE HEALTH Steps, weight, workouts, and active calories sync from Apple Health automatically. NOTIFICATIONS Optional reminders to log your meals, end your fast, or check in for the day. Turn any of them off in settings. NOTE: OnTrack is not a medical device and we do not provide medical advice. Recommendations are suggestions only. Talk to a professional and do your own research before making changes to your diet, fasting routine, or training plan. *Photo and barcode food scanning require a subscription. Everything else is free. TERMS: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Hydrabit

Features
Read full description

Drinking enough water should feel good, not like homework. Hydrabit makes it quick to log, a little bit fun to keep up, and kind when you miss a day. LOG IN A TAP Tap once to add a glass, or log any amount and any drink: water, tea, coffee, juice. Undo the last drink with a shake. Use millilitres or ounces, and set your own daily goal. WATCH IT GROW • Sipling, a little plant that grows on Today as you drink, from a seed to a full tree. It has a different look every day, or pin your favourite of 31. • Pals, 84 friendly characters that fill with colour as you drink: animals, fish and sea creatures, and cartoon heroes from a ninja to a wizard. • Or see the organ your body is working to keep hydrated, with every organ shown in 3D. STAY ON TRACK • Gentle reminders that follow your day, with Snooze when you are busy. • Streaks, a daily recap, reports, trends and your full history. • Challenges you can share with friends, and short tips on hydration. WHEREVER YOU ARE • Home Screen and Lock Screen widgets, a Live Activity on the Dynamic Island and Apple Watch app. • Quick logging with Siri and Shortcuts. • Optional Apple Health sync and iCloud backup. • 27 languages. PRIVATE BY DESIGN No account, no analytics, no ads. Your drinks, goal and history stay on your device. Purchases are handled through RevenueCat; nothing you drink is shared. FREE, WITH AN OPTIONAL UPGRADE Hydrabit is free to use. Logging, your goal, reminders, your full history, widgets, the Apple Watch app and Siri are all free, along with the heart and brain. Hydrabit Essential adds every organ, all challenges, editing and undoing logged drinks, and the full collection of plants and pals. Hydrabit is free to use. Essential is $2.99 a year with a 3-day free trial for new subscribers, or $9.99 once for life. Prices vary by country. Payment is charged to your Apple Account. The yearly plan renews unless cancelled at least 24 hours before the period ends; manage it in Settings, Subscriptions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.hydrabit.app/privacy Hydrabit gives general wellness information, not medical advice.

Screenshots

The Calorie Tracker4 screens
Hydrabit4 screens

Verdict

The call

The clearest difference is ads: Hydrabit at none against The Calorie Tracker's shown. Hydrabit also leads on device support (3 vs 1). On price, update cadence, in-app purchases and iOS requirement 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. The Calorie Tracker sells 4 in-app purchases, starting at $9.99 per month and Hydrabit sells 3 in-app purchases, starting at $2.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

The Calorie Tracker ships an update every 2 days, Hydrabit every 3 days. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 7 level
The Calorie Tracker versus Hydrabit: the parameters behind the verdict, then further details
ParameterThe Calorie TrackerHydrabit
PriceFreeFree
Rating4.6 (66 ratings) — better—
Number of ratings66 — better—
Update frequencyEvery 2 days — betterEvery 3 days
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS17.0 — better18.0
Further details — not scored
Size39 MB71 MB
Age rating4+4+
DeveloperImplicit Marketing INCGunal M

In-app purchases

4 purchases

The Calorie Tracker

Subscriptions4
  • Monthly Trial3 Days trial$9.991 Month
  • Monthly$9.991 Month
  • Annual Trial3 Days trial$49.991 Year
Show 1 more
  • Annual$49.991 Year
3 purchases

Hydrabit

Subscriptions1
  • Hydrabit Essential (Yearly)3 Days trial$2.991 Year
One-time2
  • Hydrabit Essential Lifetime Offer$4.99
  • Hydrabit Essential (Lifetime)$9.99

Questions

Is The Calorie Tracker free?
The Calorie Tracker is free to download, with in-app purchases available.
Is Hydrabit free?
Hydrabit is free to download, with in-app purchases available.
Do The Calorie Tracker or Hydrabit have ads?
The Calorie Tracker shows ads; Hydrabit does not.
Which is updated more often, The Calorie Tracker or Hydrabit?
The Calorie Tracker ships an update every 2 days, and Hydrabit every 3 days. Most recently, The Calorie Tracker was updated on October 24, 2026 and Hydrabit on October 29, 2026.

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