Comparison

TimeCalcX vs Date Countdown Assistant

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

Head to head
About

TimeCalcX

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このアプリは、「年、月、日、時間、分、秒」のいずかの入力に対して、対応する「年、月、日、時間、分、秒」を一括計算し、一括表示する時間計算専用電卓です。 電気回路や機械を扱っていると、「この部品の寿命は、平均60,000時間です」などと説明されますが、「60,000時間って、何日?、何年?」となることがあります。この時間計算用電卓を使うと、一発で「年、月、日、時間、分、秒」に変換表示されるので便利です。(60,000時間は、2500日、6.85年です) 入力した2つの日時の差分を計算する機能を追加しました。業務時間の計算の際などに利用できます。 表示する「年、月、日、時間、分、秒」は、小数点以下2桁までです。 入力する「年、月、日、時間、分、秒」は、この限りではありません。 尚、起動時直後は、1年に対する「年、月、日、時間、分、秒」が表示されています。 また、1ヶ月は30.41666667日、1年は365日として計算しており、うるう年は加味していませんので、その点はご考慮ください。 誤って、ソフトキーボード を立ち上げてしまった場合は、「Enterキー」又は、「改行キー」を押してください。

About

Date Countdown Assistant

Features
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Add your big days—wedding, exam, birthday, anniversary—and see at a glance how many days are left or how long ago it was. Date Countdown Assistant is a simple countdown app with no account required. Your data stays on your device. What you can do • Add any important date with a title and date. Create as many countdowns as you like. • See each date as “X days left” for future dates, “X days ago” for past dates, or “Today” when the day arrives. Colors help you tell past, today, and future apart at a glance. • Edit or remove any countdown anytime. Your list stays clear and under your control. • Use it offline. No sign-in, no sync, no account. Everything is stored locally. Who it’s for Whether you’re counting down to a wedding or an exam, or looking back at a milestone, Date Countdown Assistant keeps it simple. No clutter, no ads in the way—just your dates and the count. Ideal for students, couples, parents, or anyone who wants a straightforward way to track important days. Terms of Use: https://date-countdown-f655d.web.app/#/eula

Screenshots

TimeCalcX4 screens
Date Countdown Assistant4 screens

Verdict

The call

The clearest difference is in-app purchases: TimeCalcX at none against Date Countdown Assistant's 2. Date Countdown Assistant's advantage is ads (none vs shown) and update cadence (every 8 days vs every 6 months). On price, 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

Both are free to download. Date Countdown Assistant sells 2 in-app purchases, starting at $0.99 per month. TimeCalcX asks for nothing beyond the download.

UpkeepUpdate frequency

TimeCalcX ships an update every 6 months, Date Countdown Assistant every 8 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 3 level
TimeCalcX versus Date Countdown Assistant: the parameters behind the verdict, then further details
ParameterTimeCalcXDate Countdown Assistant
PriceFreeFree
Update frequencyEvery 6 monthsEvery 8 days — better
AdsYesNo — better
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size6 MB37 MB
Age rating17+4+
Developerkoji kamogawa玉辉 黄

In-app purchases

None

TimeCalcX

No in-app purchases

2 purchases

Date Countdown Assistant

Subscriptions2
  • Monthly Subscription$0.991 Month
  • Yearly Subscription$5.991 Year

Questions

Is TimeCalcX free?
TimeCalcX is free to download, with no in-app purchases.
Is Date Countdown Assistant free?
Date Countdown Assistant is free to download, with in-app purchases available.
Do TimeCalcX or Date Countdown Assistant have ads?
TimeCalcX shows ads; Date Countdown Assistant does not.
Which is updated more often, TimeCalcX or Date Countdown Assistant?
TimeCalcX ships an update every 6 months, and Date Countdown Assistant every 8 days. Most recently, TimeCalcX was updated on November 3, 2026 and Date Countdown Assistant on October 31, 2026.

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