# Date and Time Calculator Pro — user reviews

> 153 indexed App Store user reviews of Date and Time Calculator Pro by 山 钟, rated 4.80/5 from 947 ratings.

- Source: https://appshunter.io/ios/app/date-and-time-calculator-pro/id582268389/reviews
- App overview in markdown: https://appshunter.io/ios/app/date-and-time-calculator-pro/id582268389.md
- Rating breakdown: 5★ 843 · 4★ 73 · 3★ 19 · 2★ 4 · 1★ 8

## What do users think of Date and Time Calculator Pro?

Overall sentiment: positive

**Pros**

- 👍 Extremely useful
- 👍 Great app
- 👍 Excellent tool
- 👍 Useful
- 👍 Perfect app
- 👍 Awesome!
- 👍 Does the job
- 👍 Highly recommended
- 👍 Easy to use
- 👍 Top Notch Utility
- 👍 Best app of its type
- 👍 Truckers essential tool
- 👍 Time saver

**Cons**

- 🐛 Ads even after buying
- 🐛 Paid for app but still has ads
- 🐛 Pro version has ads
- 🐛 Can't reinstall my purchased app

**Commonly reported bugs**

- Paid version has lost the ability to calculate future dates based on weeks
- Date selection uses a scroll wheel instead of keypad entry
- Unable to copy or share calculation results

**Most requested features**

- Add ability to change year for date time calculation
- Implement dark mode
- Add iPad version
- Add divide option in time calculator
- Add ability to calculate working days

## Newest reviews (17 of 153)

### 4/5 — 要望です。

*2025-09-02*

開始日を複数記憶する機能が欲しいです。

### 2/5 — Paid for app

*2025-03-25*

I paid for the pro app because I use the app daily for work.  It is important in my work to be able to calculate future days, weeks, months but in the pro version they have taken away the ability for me to calculate future dates based on weeks…but that feature is still available in the unpaid version….why is this?

### 5/5 — Perfect app

*2025-02-03*

Use it for work almost everyday. Easy to use and great options for time calculation. Highly recommended.

### 5/5 — 精确，不内耗，不焦虑

*2024-12-25*

我有的时候坐火车会很焦虑，懂了这个我就可以看到还有多长时间间隔精确治疗了我的内耗和焦虑

### 5/5 — Geologist

*2024-11-22, version 1.13.4*

Thanks for the time!

### 5/5 — Bought this to support the developer

*2024-11-19*

I've no idea how this differs from the free version, I bought this Pro version to support the developer. Thanks for making such a great app with a straightforward user interface. I use it to calculate the number of days between two dates.

### 5/5 — Extremely Useful

*2024-07-31*

If you’re constantly looking at the clock to figure out WHEN to do WHAT then look no further. This is the best app to help me organize my hectic lifestyle. Thank you.

### 5/5 — Extremely Useful

*2024-07-21*

If you’re constantly looking at the clock to figure out when to do what look no further. This is the best app to help me organize my hectic lifestyle. Thank you.

### 5/5 — 簡潔實用，值得付費支持

*2024-07-07, version 1.13.0*

非常好用，直接付錢不囉嗦，謝謝開發者！

### 5/5 — Good not perfect

*2024-05-07*

Please add ability to change year for date time calculation. As it is now you have to scroll through 12 months to get to the prior year.

### 5/5 — Awesome!

*2024-03-23, version 1.13.0*

Easily the best Time and / or Date calculator I’ve used and gone through a few.

### 5/5 — 常用しています

*2024-03-01*

常用しているので、製作者様への敬意を込めて購入しました。使用感はやってもらいたい範囲の事を問題なくこなして頂けていますので特に問題ないです。 配色の変更なんかできるとちょっぴり嬉しいですよね。

### 5/5 — A tool, a toy, a necessity for recovering OCDs!

*2024-02-29*

I use my “DateTime” all the time, sometimes just to determine a fun fact, but often as a valuable time, date and valuable deltas that I need! Kudos Shan Zhong for a very cool app!

No change! STILL a great tool

### 5/5 — Useful

*2024-02-16*

I use it for future/ Daily planning. It’s s super simple and I suggest implementing it into your daily planner or whatever works best for you.

### 5/5 — Excellent tool!

*2024-02-09, version 1.12.4*

Thank you very much!

### 4/5 — 要望

*2024-01-06*

素晴らしいアプリを作っていただき、ありがとうございます。
　終了日時を開始日時にコピーできれば嬉しいです。今は手作業でダイヤルを回して合わせています。

### 5/5 — Does the job

*2023-11-26*

This helps me to track when my current pack of medications will run out, so I know when I need to buy more. Before this I really struggled to buy them in time before they ran out, do this works really well!

## Most critical reviews (10 lowest-rated)

### 1/5 — Ads even after buying

*2026-02-08, version 1.14.0*

I paied for the app but im still getting Ads. Please fix.

### 1/5 — 買專業版有廣告

*2025-03-12*

如題，這不是坑用戶嗎，建議大家不用買專業版，專業版還是有廣告…

**Developer response:** 专业版和免费版是两个不同的应用，图标也不同，专业版没有广告。

### 1/5 — Big doubt with this app …

*2023-02-05*

Be very careful! Just after installing this Chinese app, all my cryptomoney was stolen in my Trust hot wallet. Fortunately, there was not too much but this has been immediately uninstalled.

### 1/5 — Why

*2020-05-20, version 1.8.4*

I paid for the app to have no adds and I am still having ads

### 1/5 — Can’t reinstall my purchased app

*2020-02-24, version 1.7.8*

Hello - I had to reinstall my phone after it crashed. Even tho I paid for this app, it is unwilling to restore my purchase. I didn’t want to post this issue here but cannot find the developer’s contact info w/o going thru Facebook & I don’t have a FB acct. 

Mr./Ms. Zhang, can you help? I love this app & will replace this review & star ratings after this issue has been resolved. Thank you.

### 1/5 — いい加減、直してくれよ…

*2020-01-27*

開発者はレビューを見ないのだろう。
アップデートの度に報告してきて、もう5回以上は無視されている。

有料版を購入たうえでアプリの不具合の報告をしてるのに何で無視し続けるんだ？
他のユーザーには出ない不具合なのか？
もしかしてiPhoneSEだけに起こる不具合なのか？

これから書く事を、是非、他のユーザーにも確認して欲しい。

［電卓］において【開始日を含む】ボタンが終了日に反映されない。
これ不思議な事に［日付］だと正常に機能してる。
同じ日付にして【開始日を含む】ボタンをONすると【日数】が1になり、OFFにすると0になる。
これが正常だと思うが、［電卓］ではONにしてもOFFにしても【終了日】が変化しないのはおかしい。

この事を何度報告しても無視されるんだけど、他のユーザーのスマホでは、この［電卓］での【開始日を含む】ボタンは正常に機能してるの？

［日付］［時間］［日時］で「開始」「終了」に関するボタンを押すと、選択した場所にグレーの帯が移動するが、これはドラムロールをスワイプしても項目の移動はできるのに、何故かこの方法で移動すると年月日を操作するまで帯が移動しないので、どちらを選択しているか分からない。
かなり前のバージョンでは、これが正常に機能していたが、【開始日を含む】ボタンの異常を報告し始めた頃のアップデート以降は、ずっとおかしなまま。

何度報告しても開発者に無視され続けてるんだけど、他のユーザーのiPhoneで私と同じ事をしても、同じ結果にはならないって事？

もしかしてiPhoneSEのiOS11.4.1でのみ起こる不具合って事なんか？
毎回のように報告しても、この開発者に無視され続けてるって事は、そういう事なんか？

**Developer response:** 【開始日を含む】データを表示するためだけに。計算に関与しない。

### 1/5 — Junky app, do not buy!

*2017-02-04, version 1.3.8*

Junky app, navigational boobytraps, do not bother with free version, do not buy!

### 1/5 — BUGがある

*2015-05-05*

本日、バージョンアップしたのでBUGが治ったのかなと思って使ってみたけど、全く治っていませんでした。ダメですね！

### 1/5 — WRONG!!!

*2014-11-23*

Gives a WRONG result when calculating years. For example, when calculating the time difference between 11th May 2012 to 23rd November 2014, the result shows 2 years. WRONG! The answer should be 2.5 years.

### 2/5 — Stopped in development

*2026-02-21*

Upd: Response to the developer.

We are all constantly getting older. Is it really that difficult to implement dark theme support in the app? I'm sure it's not.
─────────
Low rating for 1) The lack of a dark theme, which today is simply shameful and unacceptable; 2) For the lack of a version for macOS; 3) For updates, which for a long time do not bring anything and do not fix anything, as if just deception to imitate the activities of the developer.

## Most praised reviews (10 highest-rated)

### 5/5 — It works!

*2026-05-24*

A very simple app, but it works flawlessly every time I need it. Just be sure to check if it’s counting the first day or not using the toggle switch.

### 5/5 — 好

*2026-05-12*

好喜欢

### 5/5 — 软件计算准确

*2026-03-20*

这款软件计算准确好用，非常实用

### 5/5 — Ads even after buying

*2026-02-21*

I paied for the app but im still getting Ads. Please fix.

Edit: developer responded. Thank you, i've got the paid app.

### 5/5 — 毎日使います

*2025-11-07*

フリー版でも充分ですが、生活に役立つツールを提供してくれる作者へのリスペクト。

### 5/5 — Jumper Man ⛹🏽‍♂️

*2025-10-19, version 1.14.0*

This app is my go to gauge, for detailed, fine tuned, overview planning.

### 5/5 — Extremely Useful

*2025-10-18*

If you’re constantly looking at the clock to figure out WHEN to do WHAT then look no further. This is the best app to help me organize my hectic lifestyle. Thank you. Also I’d pay for a Dark Mode right now!!

### 5/5 — Great App

*2025-09-28, version 1.14.0*

Been a great and consistent app over the years of using it.

### 5/5 — Nice

*2025-08-13*

Please show decimal time (with
1 decimal place) in the time tab when calculating time differences

### 5/5 — You’re Doing Terrific! 2025

*2025-04-19, version 1.14.0*

How about an iPad version sometime in the future? No rush. ❤️

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*