Comparison

HydroRing vs Waterday

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

Head to head
About

HydroRing

Read full description

Tap once to log a drink and watch your ring fill up. See how much water you've had today at a glance. A simple hydration tracker that's easy to stick with, even on busy days. KEY FEATURES - One-tap logging: set your favorite amounts as buttons, or enter a custom amount - Progress ring: turns gold when you go past your goal - See how much is left to reach today's goal - Choose what you're drinking (water, tea and more) - Confetti and haptics when you hit your goal - Daily streaks and 13 badges to earn - Calendar view of your past days - Weekly chart, average intake, goal days and best streak - Reminder notifications at the times you choose - Daily goal from 500 ml to 5000 ml - Switch between ml and oz - Available in English and Japanese GREAT FOR - Anyone who gets busy and forgets to drink water - Building a daily water habit - Seeing how coffee and tea fit into your day - People who gave up on trackers that ask for too much input - Staying on top of your water intake in hot or dry weather PRIVACY - No account needed - Your logs are stored only on your iPhone or iPad and are never sent to a server - No tracking - To show our other apps, the app reads public App Store information (your logs are never sent) PLEASE NOTE HydroRing is a wellness app for logging everyday drinks. It is not a medical device or a medical app. Please talk to a doctor or other qualified professional about your health.

About

Waterday

Features
Read full description

Waterday is a simple water tracker. Log every drink with one tap and see how close you are to today's goal on a clear progress ring. One-tap logging Log a cup, mug, or bottle from the presets, or enter a custom amount. Your daily total updates instantly. Goal and progress at a glance A progress ring shows how much of today's goal you've reached, with a little celebration when you hit it. Stay motivated Look back on your hydration with a weekly chart, a monthly heatmap, your goal streak, and your average intake. Home-screen widgets Add a progress-ring widget, or a one-tap logging widget, right on your Home Screen. Reminders Get gentle reminders at a set interval through your waking hours so you never forget to drink. Private by design No account required. Your data stays on your device. Supports ml and fl oz, Dark Mode, and iPad.

Screenshots

HydroRing4 screens
Waterday3 screens

Verdict

The call

The clearest difference is in-app purchases: Waterday at none against HydroRing's 1. Waterday also leads on update cadence (every 3 days vs every 6 weeks). On price, ads, device support 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. HydroRing sells 1 one-off in-app purchase. Waterday asks for nothing beyond the download.

UpkeepUpdate frequency

HydroRing ships an update every 6 weeks, Waterday every 3 days. Both last shipped on October 25, 2026.

Scorecard2 real differences · 4 level
HydroRing versus Waterday: the parameters behind the verdict, then further details
ParameterHydroRingWaterday
PriceFreeFree
Update frequencyEvery 6 weeksEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better17.0
Further details — not scored
Size2 MB8 MB
Age rating4+4+
DevelopertorankiriteDaisuke Minami

In-app purchases

1 purchases

HydroRing

One-time1
  • HydroRing Premium$3.99
None

Waterday

No in-app purchases

Questions

Is HydroRing free?
HydroRing is free to download, with in-app purchases available.
Is Waterday free?
Waterday is free to download, with no in-app purchases.
Do HydroRing or Waterday have ads?
Neither HydroRing nor Waterday shows ads.
Which is updated more often, HydroRing or Waterday?
HydroRing ships an update every 6 weeks, and Waterday every 3 days. Most recently, HydroRing was updated on October 25, 2026 and Waterday on October 25, 2026.

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