Comparison

Waltermelon vs Hydro Hero

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

Head to head
About

Waltermelon

This app helps you build a consistent hydration habit with smart reminders and AI-powered drink logging. Connect with friends for shared challenges and mutual encouragement to reach your daily water goals.

Highlights
  • AI drink recognition
  • Smart hydration reminders
  • Track all beverages
  • Caffeine and alcohol tracking
  • Daily challenges and rewards
  • Shared challenges with friends
  • Home screen widget
Features
Read full description

Water tracker and drink reminder with friends: the water app that actually sticks. Log any drink with AI, keep each other on track, and hit your daily water goal. Free to start. Drink more water. Feel better. Most people forget to drink enough water, and it shows in their energy, focus, skin, and mood. Waltermelon is a water tracker, water reminder, and drink log in one app, with a hydration buddy who keeps you accountable. Meet Walter, your hydration buddy He's friendly, fun, and makes sure you never forget your next sip. Walter turns drinking water into a habit with playful design, smart water reminders, and streaks that keep you going. Smart Water Reminders Your drink water reminder shouldn't feel like spam. Walter sends reminders based on your wake time, sleep schedule, and daily hydration goal, so you get a nudge when you actually need one. AI Drink Recognition Can't find your drink on the list? Just type it. Our AI identifies hydration value, caffeine, sugar, alcohol, and more. Craft cocktail, oat milk latte, or homemade smoothie, AI handles it in seconds. Trying something once? Log it without adding it to your beverage list. Caffeine and Alcohol Tracker Coffee, tea, energy drinks, beer, wine: every beverage counts toward your hydration with its real hydration efficiency. See your caffeine and alcohol alongside your water intake. Daily Challenges and Rewards Small tasks, new every day: log your drinks, hydrate before a set time, hit your goal. Each challenge earns 10 to 25 Drops, and finishing them all opens a chest of rewards. Rescue Shield Life gets busy. Spend your Drops on a Rescue Shield and one missed day won't break your streak. You decide when to use it, and your calendar shows the days it saved. Shared Challenges with Friends Pick friends, a challenge type, and a length. Everyone works toward their own daily goal and scores for the team. If the group makes it, everyone gets Drops, and the reward grows with every person and every day. Keep Each Other on Track See how your friends' day is going, send a cheer or a nudge in one tap, and check their week and streak on their profile. Invite a friend and earn Drops once they log their first drink. Build Your Streak Every day you hit your water goal, your streak grows. Hit a milestone? Earn a badge, and Walter will be your biggest cheerleader. Your full history and calendar are one tap away. Home Screen Widget and Apple Health Log water from your home screen widget without opening the app, and sync your water intake with Apple Health. Smart Hydration Features - Personalized daily water intake goal based on weight, activity, and lifestyle. - Smart water reminders that adapt to your schedule. - Track all beverages: water, coffee, tea, juice, milk, alcohol, and more, with hydration efficiency. - AI drink recognition for any beverage. - Caffeine tracker and alcohol tracker built into your hydration log. - Daily challenges, Drops, and a Rescue Shield for missed days. - Shared challenges with friends, with cheers and nudges. - Hydration log with full history, calendar, and streak stats. - Home screen widget to log water in one tap. - Apple Health sync for complete wellness tracking. - Premium perks: AI drinks, custom beverages, personalized reminders, full beverages list, drink history editing, and more shared challenge types and lengths. Made for real goals People use Waltermelon to: - Support weight loss with consistent hydration. - Follow a doctor's advice to drink more water. - Boost skin health, energy, and focus. - Build a daily drink water habit that lasts. - Stay hydrated during pregnancy, workouts, or hot days. Download Waltermelon and invite your friends. Keep each other on track, build your streak together, and feel better every day. Your body deserves it. Privacy Policy: https://waltermelon.app/privacy-policy Terms and Conditions: https://waltermelon.app/terms-and-conditions

About

Hydro Hero

This app makes staying hydrated enjoyable by turning each drink into a rewarding challenge. Log your intake, visualize your progress, and celebrate reaching your daily hydration goals with fun animations and sound effects.

Highlights
  • Log drinks with animated reveals
  • Customizable sound packs
  • Streaks and achievement badges
  • Detailed stats and trends
  • Track various beverage types
  • Sync with Apple Health
  • Reminders and widgets
  • Apple Watch integration
Features
Read full description

Staying hydrated has never been this fun. Hydro Hero turns every glass of water into a rewarding daily challenge — log your drinks, watch your tank fill up, and celebrate the moment you reach your daily hydration goal. WHY YOU'LL LOVE HYDRO HERO Satisfying Drink Logging Every drink fills your tank with a fun, animated reveal. Log your intake, watch your progress rise, and celebrate when you hit your goal. Sound Packs Make hydration genuinely satisfying with upgraded sound effects and haptics as you log — or record your own custom sounds to play each time you drink (PRO). Streaks & Achievements Build daily streaks and unlock 20+ badges as you stay consistent — from First Drop to Perfect Week. Stats & Trends Track your weekly summary, beverage breakdown, and progress charts at a glance. Track Any Drink Water, coffee, tea, soda, juice, sports drinks and more — each with smart hydration efficiency. Add custom amounts in oz or ml. Hydrate With Your Squad Add friends, share your progress, and cheer each other on to stay motivated together. Apple Health Sync: Read and write your water intake to Apple Health, keeping your hydration alongside the rest of your health data. Reminders & Widgets: Get gentle nudges to drink up, and check your progress right from your Home Screen. On Your Apple Watch Log any drink straight from your wrist — pick a beverage, tap a preset or dial in a custom amount with the Digital Crown, and see your progress, goal, and streak sync instantly with your iPhone. Siri on iPhone and Apple Watch — "Hey Siri, log preset [name] in Hydro Hero" — log any of your saved presets from your Phone or Watch, hands-free. Hero Missions: Turn your daily goal into a quest. Four evergreen Mission chains — The Hero's Journey, Tea Time, Hourly Hydration, and Dry Spell — let you earn Hero Sigils, miss-day Shields, and unlock new powers as you complete Bronze, Silver, and Gold tiers. Live Activity: Keep your tank on your Lock Screen and Dynamic Island so you can check your hydration at a glance. Opt in anytime — off by default. Family Mode: One phone, the whole household. Each family member gets their own profile with their own goal, streak, history, and emoji avatar — and you can see everyone's progress on the Squad tab. Free for 2 profiles, Pro unlocks up to 5. Everything stays local — no cloud, no accounts. Make every sip count. Download Hydro Hero and make hydration the best part of your day! ———————— Hydro Hero PRO is available as an auto-renewing monthly subscription or a one-time lifetime purchase. • Payment is charged to your Apple ID account at confirmation of purchase. • Your subscription automatically renews unless auto-renew is turned off 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, at the price shown in the app. • You can manage or cancel your subscription in your App Store account settings after purchase. Privacy Policy: https://wimsby.github.io/Hydro-Hero/privacy-policy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Waltermelon4 screens
Hydro Hero4 screens

Verdict

The call

The clearest difference is rating: Hydro Hero at 5.0 against Waltermelon's 4.8. Waltermelon's advantage is ratings volume (29 vs 7). On price, review sentiment, update cadence 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. Waltermelon sells 9 in-app purchases, starting at $2.99 per month and Hydro Hero sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Hydro Hero holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 29 and 7 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Waltermelon ships an update weekly, Hydro Hero every 4 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Waltermelon versus Hydro Hero: the parameters behind the verdict, then further details
ParameterWaltermelonHydro Hero
PriceFreeFree
Rating4.8 (29 ratings)5.0 (7 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings29 — better7
Update frequencyWeeklyEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS15.615.1 — better
Further details — not scored
Size96 MB67 MB
Age rating4+12+
DeveloperPawel LawinskiDylan Matuschka

Customer experience

Waltermelon

All ratings27 ratings
Positive92.6%
Neutral7.4%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Hydro Hero

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

9 purchases

Waltermelon

Subscriptions6
  • Waltermelon Premium Monthly$2.991 Month
  • Waltermelon Premium Weekly$4.997 Days
  • Waltermelon Premium Yearly7 Days trial$14.991 Year
Show 3 more
  • Waltermelon Premium Yearly1 Year trial2 variants$29.991 Year
  • Waltermelon Premium Yearly7 Days trial$29.991 Year
  • Waltermelon Premium Yearly$29.991 Year
One-time3
  • Waltermelon Premium: Sale$19.99
  • Waltermelon Premium Lifetime$34.99
  • Waltermelon Lifetime Plus$79.99
2 purchases

Hydro Hero

Subscriptions1
  • Pro Access - Monthly$0.991 Month
One-time1
  • Pro Access - One Time$9.99

Questions

Is Waltermelon free?
Waltermelon is free to download, with in-app purchases available.
Is Hydro Hero free?
Hydro Hero is free to download, with in-app purchases available.
Which has better reviews, Waltermelon or Hydro Hero?
Hydro Hero is rated higher. Waltermelon averages 4.8 out of 5 from 29 ratings, while Hydro Hero averages 5.0 from 7 ratings.
Do Waltermelon or Hydro Hero have ads?
Neither Waltermelon nor Hydro Hero shows ads.
Which is updated more often, Waltermelon or Hydro Hero?
Waltermelon ships an update weekly, and Hydro Hero every 4 days. Most recently, Waltermelon was updated on November 8, 2026 and Hydro Hero on October 31, 2026.

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