Comparison

DayTimer vs RedoCalc

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

Head to head
About

DayTimer

Features
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ToDoタスクをデザインする! 人生タイマーで、人生の現在地を常に意識できる! このアプリで毎日のうっかりや、流されることがなくなります。 期限のあるイベントまでのカウントダウンは勿論、記念日など毎年リピートするものをメモと色で設定できます。 そして、通知も多く設定できるので忘れることはありません。 稀にしかやらない、胃カメラ、オイル交換など前回いつやったのかを管理するのにも便利です。 数が多くなっても、ソート機能が充実。同じタブをもう1度押すと並び順が上下逆になります。 さらに、営業日カウント(平日のみで残日数表示)や通知も複数設定可。祝日は具体的に何の日なのかも表示。 あと1つしか設定できませんが、人生タイマーを使うことができます。 平均寿命から設定もできますが、ご自分で持病や体質を考慮して自分の寿命を設定すると残りの人生の日数、消化率を表示します。 我々人間は、目の前のことに反応し、流されてしまう意志の弱い人が私を含めて多いと思います。 人生を俯瞰的に常に見続けることにより、今の生き方、取り組む姿勢は変わります。 機種変更した時に設定内容を引き継げる機能も用意しています。 この機能は、複数のデバイスで設定内容を共有する機能としても便利です。 このアプリで皆さまの生活がより良いものになるように今後もアップデイトしていきます。

About

RedoCalc

Features
Read full description

This is a calculator for people who only use it for simple calculations, such as adding up receipts or calculating the cost of a meal split between several people, but who are always worried about whether the input was correct. As it is a simple calculator, the only operations it can perform are - Four arithmetic operations (addition, subtraction, multiplication, division) - Percentage calculations (including calculations such as consumption tax using percentages) . The results are displayed as numbers with a digit symbol. There is no complicated exponential display. The calculation proceeds in the order of the keys you enter. There is no priority for multiplication or division. The formulas you enter are displayed in order in the upper area as a history. If you tap the white part, it will turn yellow and you will be able to modify that part. (You can modify not only numbers, but also arithmetic symbols such as + and ×.) If you tap “=”, the expressions from the first line to the last line will be recalculated. The result will be automatically copied, so you can switch to other apps and paste the value there.

Screenshots

DayTimer4 screens
RedoCalc3 screens

Verdict

The call

The clearest difference is update cadence: RedoCalc at every 3 days against DayTimer's every 3 weeks. DayTimer's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, ads and in-app purchases 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

DayTimer ships an update every 3 weeks, RedoCalc every 3 days. The most recent releases landed on September 11, 2026 and September 8, 2026 respectively.

Scorecard3 real differences · 3 level
DayTimer versus RedoCalc: the parameters behind the verdict, then further details
ParameterDayTimerRedoCalc
PriceFreeFree
Update frequencyEvery 3 weeksEvery 3 days — better
AdsYesYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better18.0
Further details — not scored
Size216 MB3 MB
Age rating4+4+
DeveloperZOOMO Inc.Toshiyuki Kuwabara

In-app purchases

None

DayTimer

No in-app purchases

None

RedoCalc

No in-app purchases

Questions

Is DayTimer free?
DayTimer is free to download, with no in-app purchases.
Is RedoCalc free?
RedoCalc is free to download, with no in-app purchases.
Do DayTimer or RedoCalc have ads?
Both DayTimer and RedoCalc show ads.
Which is updated more often, DayTimer or RedoCalc?
DayTimer ships an update every 3 weeks, and RedoCalc every 3 days. Most recently, DayTimer was updated on September 11, 2026 and RedoCalc on September 8, 2026.

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