Comparison

MizuApp vs Waterday

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

Head to head
About

MizuApp

Features
Read full description

日本の生活に合わせた水分補給トラッカーです。 【主な機能】 ・麦茶・緑茶・烏龍茶・スポーツドリンクなど日本の飲み物に対応 ・500mlペットボトル・350ml缶など日本の一般的なサイズをデフォルト設定 ・水グラスのアニメーションで達成度を視覚的に表示 ・過去7日間のグラフで摂取量を確認 ・1日の目標量をカスタマイズ(1500〜3000ml) 【熱中症対策に】 夏の熱中症予防に、こまめな水分補給をサポートします。 すべてのデータは端末内に保存されます。

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

MizuApp4 screens
Waterday3 screens

Verdict

The call

The clearest difference is update cadence: Waterday at every 3 days against MizuApp's monthly. 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

MizuApp ships an update monthly, Waterday every 3 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 5 level
MizuApp versus Waterday: the parameters behind the verdict, then further details
ParameterMizuAppWaterday
PriceFreeFree
Update frequencyMonthlyEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better17.0
Further details — not scored
Size37 MB8 MB
Age rating4+4+
DevelopermaokoDaisuke Minami

In-app purchases

None

MizuApp

No in-app purchases

None

Waterday

No in-app purchases

Questions

Is MizuApp free?
MizuApp is free to download, with no in-app purchases.
Is Waterday free?
Waterday is free to download, with no in-app purchases.
Do MizuApp or Waterday have ads?
Neither MizuApp nor Waterday shows ads.
Which is updated more often, MizuApp or Waterday?
MizuApp ships an update monthly, and Waterday every 3 days. Most recently, MizuApp was updated on November 9, 2026 and Waterday on October 31, 2026.

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