Comparison

Matrix ToDo vs 日付計算

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

Head to head
About

Matrix ToDo

Features
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Matrix ToDo is a simple 4-quadrant task management app for people who struggle with prioritizing tasks and staying focused. Just sort your tasks into four simple categories: “Do Now,” “Schedule,” “Clear Soon,” and “Eliminate.” By organizing tasks by importance and urgency, you can see what you should do today and focus on what truly matters. Perfect for: • People who struggle to prioritize tasks • People who often procrastinate • People who feel overwhelmed by too many things to do • People who have ADHD tendencies and find task management difficult • People who cannot stick with regular ToDo apps • People looking for a simple and focused task management app Main Features: • Organize tasks with the importance × urgency matrix • Simple and intuitive task creation and editing • Clean and minimal design • Works offline • Dark mode support Organize your tasks, reduce procrastination, and focus on what matters now. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

日付計算

Features
Read full description

100日後は、何月何日? 旅行まで、あと何日? 日付計算は、日付にまつわる6つの計算をひとつにまとめたアプリです。大きな結果表示と、アイコン付きの機能メニューで、知りたい答えをすぐ確認できます。 ■ 何日後・何日前を調べる 基準日と日数から日付を計算。よく使う日数を選ぶほか、目盛りを動かしたり、数字を直接入力したりできます。 ■ 予定まで、あと何日? 旅行、記念日、締め切りまでの日数を確認。名前を付けて保存すると、近い予定から順に見返せます。 ■ 2つの日付の差を数える 開始日と終了日から日数差と週・日の内訳を表示。つまみを動かして日付を変更でき、開始日を含める設定や日付の入れ替えにも対応します。 ■ 営業日を数える 土日を除く計算と、土日・日本の祝日を除く計算を切り替えられます。振替休日・国民の休日にも対応します。 ■ 年齢・誕生日を確認 生年月日から満年齢、生後日数、次の誕生日までの日数を計算します。 ■ 西暦と和暦を見比べる 元号、曜日、年内の日数をまとめて表示します。 計算結果はコピーでき、日付は数字でもカレンダーでも入力できます。アカウント登録は不要。計算履歴と予定は端末内に保存します。 【追加購入なしで使える機能】 6つの基本計算、結果のコピー、10件までの保存。 【買い切りの全機能アンロック】 保存件数の上限解除、タグ・メモ、Appleカレンダー連携。保存したカウントダウンを標準カレンダーの予定編集画面へ渡せます。通知時刻や保存先カレンダーは、iOS標準の編集画面で設定します。 営業日は、選択した休日設定に基づく計算です。勤務先独自の休業日や個別の営業日程は反映しません。

Screenshots

Matrix ToDo3 screens
日付計算4 screens

Verdict

The call

The clearest difference is price: Matrix ToDo at Free against 日付計算's $0.99. Matrix ToDo also leads on update cadence (fortnightly vs every 4 months). 日付計算's advantage is ads (none vs shown). On in-app purchases, 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

Matrix ToDo is free to download; 日付計算 costs $0.99 up front. Matrix ToDo sells 3 in-app purchases, starting at $1.99 per month and 日付計算 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Matrix ToDo ships an update fortnightly, 日付計算 every 4 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 3 level
Matrix ToDo versus 日付計算: the parameters behind the verdict, then further details
ParameterMatrix ToDo日付計算
PriceFree — better$0.99
Update frequencyFortnightly — betterEvery 4 months
AdsYesNo — better
In-app purchasesYesYes
DevicesiPhoneiPhone
Requires iOS16.4 — better17.0
Further details — not scored
Size60 MB10 MB
Age rating4+4+
DeveloperTSUBASA SATOSMART BIT, K.K.

In-app purchases

3 purchases

Matrix ToDo

Subscriptions2
  • Pro Monthly$1.991 Month
  • Pro Yearly$9.991 Year
One-time1
  • Remove Ads$17.99
1 purchases

日付計算

One-time1
  • 全機能アンロック$2.99

Questions

Is Matrix ToDo free?
Matrix ToDo is free to download, with in-app purchases available.
Is 日付計算 free?
日付計算 costs $0.99, and also offers in-app purchases.
Do Matrix ToDo or 日付計算 have ads?
Matrix ToDo shows ads; 日付計算 does not.
Which is updated more often, Matrix ToDo or 日付計算?
Matrix ToDo ships an update fortnightly, and 日付計算 every 4 months. Most recently, Matrix ToDo was updated on October 25, 2026 and 日付計算 on October 24, 2026.

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