Comparison

onTrack vs Hydra

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

Head to head
About

onTrack

Effortlessly monitor your daily active and resting calorie burn, and track your food intake against personalized targets. Stay motivated with customizable home screen widgets that display your progress at a glance.

Highlights
  • Automatic activity and calorie syncing
  • Monitor burned calories with progress bars
  • Track consumed calories and meal targets
  • Home screen widgets for instant data view
  • Customizable graph and widget colors
Features
Read full description

OnTrack is a calorie tracking app that works best with Apple Watch and Apple Health. It automatically syncs your activity and calorie data to help you stay on top of your fitness goals. Whether you’re training for performance or just staying active, OnTrack provides intuitive insights that keep you motivated and informed every step of the way. Daily Activity Effortlessly monitor your daily activity, calorie burn, and more through dynamic progress bars and weekly charts. See how your current totals compare against your goals with real-time updates and personalized visuals. Apple Watch users will benefit from the most accurate tracking, making OnTrack a powerful tool for understanding your energy expenditure. Meal Logging Track your daily intake and see how your meals stack up against your targets. Weekly consumption graphs help visualize trends, while simple summaries highlight how close you are to reaching your calorie goals each day. Widgets Stay motivated with powerful widgets that bring your data to your Home Screen and Lock Screen. Instantly view daily activity stats all without opening the app. Widgets are color-coded and customizable (with upgrade), keeping your progress front and center throughout the day. Customization Make your experience your own by purchasing color customization for graphs and widgets for $6.99. Personalize metric colors, heatmap themes, and widget backgrounds across the app and your widgets. Match your style and stay motivated.

About

Hydra

Features
Read full description

Hydra is a hydration tracker built around a single gesture: drag up anywhere on the home screen and watch the water rise to where you logged. Most water apps use a generic 2L target. Hydra calculates yours from your weight, sex, activity level, and climate — then bumps it up automatically when you take creatine. Because creatine pulls water into your muscle cells, you actually need more. DESIGNED AROUND THE WAY YOU DRINK • Drag to pour — pan up anywhere on the home screen • Quick-add presets for a glass (250ml), bottle (500ml), or shaker (700ml) • Custom amounts for anything in between • A live water-level background that fills as you progress CREATINE-AWARE TARGETS • One-tap daily creatine pill • Target adjusts automatically: +500ml per 5g dose • Personalized baseline from weight, sex, activity, and climate STREAKS THAT FORGIVE A BAD DAY • Daily streak counter • Personal best tracking • One streak freeze per week • Milestone glow effects every 7 days PRIVATE BY DEFAULT • No account, no login, no email • No analytics, no trackers, no ads • Everything stays on your device Drag to pour. Hit your goal. Build the streak. --- SUBSCRIPTION DETAILS Hydra Pro is available as an auto-renewing subscription: • Hydra Pro Monthly — £4.99 / month • Hydra Pro Annual — £29.99 / year (save 50%) Prices may vary by region. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. Payment is charged to your Apple ID at confirmation of purchase. Manage or cancel any time in your Apple ID account settings. Privacy Policy: https://polar-blanket-f7a.notion.site/Hydra-Privacy-Policy-34f767e65704814b89b5fc807bb09a3d Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

onTrack3 screens
Hydra4 screens

Verdict

The call

The clearest difference is iOS requirement: Hydra at 15.1 against onTrack's 17.0. On price, ads, in-app purchases and device support 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. onTrack sells 1 one-off in-app purchase and Hydra sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 8 level
onTrack versus Hydra: the parameters behind the verdict, then further details
ParameteronTrackHydra
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 7 months—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size3 MB41 MB
Age rating17+12+
DeveloperAnuj ShelatRyan Creary

In-app purchases

1 purchases

onTrack

One-time1
  • Customization Feature$6.99
2 purchases

Hydra

Subscriptions2
  • Hydra Pro Monthly3 Days trial$6.991 Month
  • Hydra Pro Annual3 Days trial$39.991 Year

Questions

Is onTrack free?
onTrack is free to download, with in-app purchases available.
Is Hydra free?
Hydra is free to download, with in-app purchases available.
Do onTrack or Hydra have ads?
Neither onTrack nor Hydra shows ads.

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