Comparison

ウミミル海況シミュレーション vs ChartDay

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

Head to head
About

ウミミル海況シミュレーション

Features
Read full description

■概要 海況(水温、潮流)のシミュレーションアプリです。 4日先までの海況情報をアニメ—ション表示、コマ送り、任意時間の情報閲覧ができます。 海洋環境閲覧アプリ「ウミミル」の登録情報をもとに、ICTブイ設置エリア近海の情報を表示します。 ウミミルの設定画面から、当アプリへ簡易ログインできます。 また、ICTブイが計測している直近の水温情報が併記されます。 情報の粒度は1kmメッシュ、1時間毎となります。 毎日10:30に当日10時より120時間分の予測情報を更新します。 予測情報は「株式会社 フォーキャスト・オーシャン・プラス」が提供しています。 http://www.forecastocean.com/j/index.html ・株式会社NTTドコモ ウミミル問合せ先 suisan@nttdocomo.com ・アンデックス株式会社 水産ITチーム suisanit@and-ex.co.jp

About

ChartDay

Track daily habits, health, and fitness with interactive charts. Offers instant statistics, goal setting, and data export. Syncs across devices and provides home screen widgets for quick access.

Highlights
  • Daily tracking with interactive charts
  • Instant statistical calculations
  • Goal setting with target lines
  • Tagging and filtering for organization
  • Home screen widgets
  • iCloud sync across devices
  • Data export to CSV
Features
Read full description

Track your daily habits, health, fitness, and more — visualized in beautiful, interactive charts. ◉ Key Features ・Daily Tracking Made Simple  Enter a number each day and watch your progress unfold as a chart.  View trends by week or month at a glance. ・Instant Stats  Automatic calculations for sum, count, min, max, mean, and median — always up to date. ・Set Goals & Stay Motivated  Add a target line or range directly on your chart to keep your objectives in sight. ・Tags & Filtering  Organize entries with custom tags and filter your chart by any combination. ・Home Screen Widgets  Check your latest data without opening the app.  Tap the widget to jump straight to data entry. ・iCloud Sync  Your charts stay safe and in sync across all your devices. ・Multi-Entry Mode  Record multiple data points per day with timestamps on a single chart.  Ideal for tracking walks, meals, workouts, or anything that happens more than once a day. ・Data Export  Export any chart as a CSV file whenever you need it. ・Private & Ad-Free  No ads, no tracking, no data collection. Your data belongs to you. ◉ ChartDay Unlimited (In-App Purchase) Unlock unlimited chart creation with a one-time purchase. Try it free first — add up to 100 data points before deciding.

Screenshots

ウミミル海況シミュレーション3 screens
ChartDay4 screens

Verdict

The call

The clearest difference is in-app purchases: ウミミル海況シミュレーション at none against ChartDay's 1. ウミミル海況シミュレーション also leads on iOS requirement (10.0 vs 16.2). ChartDay's advantage is update cadence (every 3 weeks vs every 8 months). On price, ads 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. ChartDay sells 1 one-off in-app purchase. ウミミル海況シミュレーション asks for nothing beyond the download.

UpkeepUpdate frequency

ウミミル海況シミュレーション ships an update every 8 months, ChartDay every 3 weeks. The most recent releases landed on October 29, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
ウミミル海況シミュレーション versus ChartDay: the parameters behind the verdict, then further details
Parameterウミミル海況シミュレーションChartDay
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 8 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPodiPhone, iPad
Requires iOS10.0 — better16.2
Further details — not scored
Size8 MB2 MB
Age rating4+4+
DeveloperANDEXFu Ni

In-app purchases

None

ウミミル海況シミュレーション

No in-app purchases

1 purchases

ChartDay

One-time1
  • ChartDay Unlimited$1.99

Questions

Is ウミミル海況シミュレーション free?
ウミミル海況シミュレーション is free to download, with no in-app purchases.
Is ChartDay free?
ChartDay is free to download, with in-app purchases available.
Do ウミミル海況シミュレーション or ChartDay have ads?
Neither ウミミル海況シミュレーション nor ChartDay shows ads.
Which is updated more often, ウミミル海況シミュレーション or ChartDay?
ウミミル海況シミュレーション ships an update every 8 months, and ChartDay every 3 weeks. Most recently, ウミミル海況シミュレーション was updated on October 29, 2026 and ChartDay on October 6, 2026.

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