Comparison

日付計算 vs Days Counter

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

Head to head
About

日付計算

Features
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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。

About

Days Counter

Track important dates with visually appealing widgets that count down to future events or count up from past ones. Customize with photos or preset backgrounds and receive timely notifications. Organize events with categories and sync across devices.

Highlights
  • Reliable widget updates
  • Count down to future dates
  • Count up from past dates
  • Photo-first design
  • Repeating event support
  • Customizable notifications
  • iCloud sync
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See "how many days" at a glance — and make every day a little more exciting. Trips, concerts, exams, weddings. Or the day you met, the day they were born, the day you quit smoking. DaysCounter shows both "days until" and "days since," beautifully layered over your favorite photos. ■ WIDGETS THAT UPDATE RELIABLY DaysCounter pre-renders 14 days of widget timelines in advance, so your numbers tick over reliably at midnight — every night. Full support for Home Screen widgets (small, medium, large) and Lock Screen widgets (circular, rectangular, inline). ■ COUNT DOWN AND COUNT UP Future dates count down, past dates count up — detected automatically, switchable manually. And when there's less than a day left, YOU decide whether it switches to hours or stays in days. ■ PHOTO-FIRST DESIGN Your photos, full screen. One big beautiful number on top. No photo? Choose from 5 free preset backgrounds or 50 premium designs. ■ REPEATING EVENTS Birthdays repeat yearly, payday monthly, trash day weekly. Set once and the date rolls forward automatically. ■ AND MORE - Organize events with 12 categories - Notifications: on the day, 1 day before, 1 week before, or custom - iCloud sync — switch phones without losing anything - JSON backup & restore - Share your countdown as an image on social media ■ FREE vs PRO Everything essential is free: unlimited events, all widget types (with ads). Upgrade to Pro — a one-time purchase, not a subscription: - Remove all ads forever - Unlock all 50 premium backgrounds - Create custom categories - Business-day counting and repeat-every-X-days No subscriptions. Pay once, keep it forever. Keep the days that matter where you can always see them. Start counting today.

Screenshots

日付計算4 screens
Days Counter4 screens

Verdict

The call

The clearest difference is price: Days Counter at Free against 日付計算's $0.99. Days Counter also leads on update cadence (every 2 weeks 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

Days Counter is free to download; 日付計算 costs $0.99 up front. 日付計算 sells 1 one-off in-app purchase and Days Counter sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

日付計算 ships an update every 4 months, Days Counter every 2 weeks. The most recent releases landed on November 10, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 5 level
日付計算 versus Days Counter: the parameters behind the verdict, then further details
Parameter日付計算Days Counter
Price$0.99Free — better
Positive reviews—100.0% of reviews
Update frequencyEvery 4 monthsEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone
Requires iOS17.017.0
Further details — not scored
Size10 MB14 MB
Age rating4+4+
DeveloperSMART BIT K.KKe Tong

In-app purchases

1 purchases

日付計算

One-time1
  • 全機能アンロック$2.99
1 purchases

Days Counter

One-time1
  • DaysCounter Pro$2.99

Questions

Is 日付計算 free?
日付計算 costs $0.99, and also offers in-app purchases.
Is Days Counter free?
Days Counter is free to download, with in-app purchases available.
Do 日付計算 or Days Counter have ads?
Days Counter shows ads; 日付計算 does not.
Which is updated more often, 日付計算 or Days Counter?
日付計算 ships an update every 4 months, and Days Counter every 2 weeks. Most recently, 日付計算 was updated on November 10, 2026 and Days Counter on November 5, 2026.

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