Comparison

かんたんタスクカレンダー vs When Again?

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

Head to head
About

かんたんタスクカレンダー

Features
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かんたんタスクカレンダーは、カレンダーとタスク管理を一体化したシンプルな予定管理アプリです。 【カレンダー表示】 月表示・週表示の2つのカレンダービューで、タスクの締切日をビジュアルで確認できます。予定とやることを一画面で把握できます。 【自動セクション分け】 タスクを「期限超過」「今日」「今週」「今月」「それ以降」のセクションに自動で振り分けます。やることが一目でわかるので、毎日の管理がスムーズになります。 【グループ・カテゴリで整理】 仕事・プライベート・学業など用途別にグループを作成して色分け管理。カテゴリも設定でき、フィルターで絞り込み表示が可能です。 【優先度設定】 高・中・低の3段階で優先度を設定。重要なタスクを見逃しません。 【通知リマインダー】 締切の何分前に通知するかを設定できます。タスクごとに個別設定も可能です。 【一括削除】 タスクを長押しすると複数選択モードに入ります。期限切れ・完了済みのタスクをまとめて削除できます。 【ダークモード対応】 ライト・ダーク・システム連動の3つのテーマを切り替え可能。 【完全ローカル保存】 データはすべて端末内に保存。インターネット接続不要で、プライバシーも安心です。

About

When Again?

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"When did I last do that?" Bike oil changes, haircuts, salon visits, AC cleaning, doctor appointments, pet care — things you do again and again, but once enough time passes, you can't remember when you last did them. When Again? clears up that little everyday question with a single tap. Just log the date. The app automatically counts the days since you last did it, learns your average interval from your own records, and gives you a heads-up when it's about time. ■ Who it's for ・People who forget when their bike or car was last serviced ・Anyone managing regular salon, hair, or nail appointments ・People tracking doctor visits, medication, or health habits ・Anyone who wants to stop thinking "wow, it's already been a while" ・People who want to start right away — no account needed ■ Key features ◎ See the days at a glance Your items line up on the home screen, each with a badge showing how many days since you last did it. What needs doing now is obvious. ◎ "About time" reminders, automatically The app learns your average interval from your records, gathers the items coming due at the top of the home screen, and reminds you with notifications too. ◎ Track anything Use the preset categories or add your own with custom icons and colors. From bike maintenance to beauty to health — manage it all in one app. ◎ Photos, tags, amounts, and notes It's more than a date log. Add up to 5 photos, tags, the amount you spent, and notes to each record — so you can look back on what state it was in last time and how much it cost. ◎ Detailed history and stats The detail screen shows stats like "since last time," "average interval," and totals, plus a month-by-month timeline. ◎ Search Search across notes, tags, and item names to find past records instantly. ◎ Easy backup Save and restore all your records to a file (photos included). CSV export is also supported. ◎ Dark mode Choose system, light, or dark. ■ Privacy first All your records are stored only on your device. No account, no login. We never send your records to a server — so you can start with peace of mind. ■ Pricing The core features are free. Some premium features are available via a one-time in-app purchase. Leave your everyday "when was that again?" to When Again?

Screenshots

かんたんタスクカレンダー4 screens
When Again?4 screens

Verdict

The call

The clearest difference is in-app purchases: かんたんタスクカレンダー at none against When Again?'s 1. かんたんタスクカレンダー also leads on ads (none vs shown) and device support (3 vs 1). When Again?'s advantage is update cadence (daily vs every 10 days). On price 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. When Again? sells 1 one-off in-app purchase. かんたんタスクカレンダー asks for nothing beyond the download.

UpkeepUpdate frequency

かんたんタスクカレンダー ships an update every 10 days, When Again? daily. The most recent releases landed on September 14, 2026 and September 22, 2026 respectively.

Scorecard4 real differences · 2 level
かんたんタスクカレンダー versus When Again?: the parameters behind the verdict, then further details
ParameterかんたんタスクカレンダーWhen Again?
PriceFreeFree
Update frequencyEvery 10 daysDaily — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better16.4
Further details — not scored
Size38 MB59 MB
Age rating4+4+
DeveloperYu OtsukaMasamune Hiroiwa

In-app purchases

None

かんたんタスクカレンダー

No in-app purchases

1 purchases

When Again?

One-time1
  • プレミアム(買い切り)$4.99

Questions

Is かんたんタスクカレンダー free?
かんたんタスクカレンダー is free to download, with no in-app purchases.
Is When Again? free?
When Again? is free to download, with in-app purchases available.
Do かんたんタスクカレンダー or When Again? have ads?
When Again? shows ads; かんたんタスクカレンダー does not.
Which is updated more often, かんたんタスクカレンダー or When Again??
かんたんタスクカレンダー ships an update every 10 days, and When Again? daily. Most recently, かんたんタスクカレンダー was updated on September 14, 2026 and When Again? on September 22, 2026.

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