# Time Calculator: Add, Subtract — user reviews

> 18 indexed App Store user reviews of Time Calculator by Phan Nhat Đang, rated 4.60/5 from 167 ratings.

- Source: https://appshunter.io/ios/app/time-calculator-add-subtract/id1583726955/reviews
- App overview in markdown: https://appshunter.io/ios/app/time-calculator-add-subtract/id1583726955.md
- Rating breakdown: 5★ 139 · 4★ 10 · 3★ 7 · 2★ 5 · 1★ 6

## Most critical reviews (10 lowest-rated)

### 1/5 — Pravin P

*2025-08-07*

Too many adds while using the application

### 1/5 — Can subtract time for free

*2025-08-06*

You can’t even subtract a time period from a set time unless you buy the pro version. 

I knew the free version would have ads and probably some features would be locked. But I still expected the free version to have all of the BASIC functionality of a “time calculator” (i.e., add AND subtract time).

### 1/5 — Not what it seems

*2024-06-12*

I downloaded this app for work to determine length of wait times. It initially worked great. However; when I opened the app to use it again it took me to a "Scanning" app and won't let me go further unless downloaded the additional app...
Nope not goi g to happen!
I don't recommend this app!!!!

### 1/5 — Disappointing and Unreliable!😠😠😠

*2024-05-12*

I found the Time Calculator app to be utterly useless. Despite entering correct dates, it consistently shows an "invalid date" error, making it impossible to use. Additionally, there's a heavy push to purchase the paid version, which is frustrating when the basic functionality is so flawed. Overall, the app doesn't work properly and isn't worth downloading. Very disappointed. ☹️☹️☹️

### 1/5 — Ужас

*2023-07-21*

Ужасное приложение

### 1/5 — 广告软件

*2023-06-19*

垃圾软件都是广告

### 2/5 — Give me money

*2026-03-10*

That’s all they want is money. Oh and the ads. Wonderful…

### 2/5 — Not working

*2025-01-12*

I used to be able to add between two different times. And now each time I go and use it it keeps saying invalid start time when it never did that before. And it’s only when I paid for the full version so I don’t understand how now all of a sudden it’s not working. I want my money back and I’ll take the free version again because at least the free version actually worked. 
Update: I’m thought I’d give it another shot but, it STILL DOESNT WORK

### 2/5 — Not working

*2025-01-02*

I used to be able to add between two different times. And now each time I go and use it it keeps saying invalid start time when it never did that before. And it’s only when I paid for the full version so I don’t understand how now all of a sudden it’s not working. I want my money back and I’ll take the free version again because at least the free version actually worked.

### 2/5 — 要望

*2022-03-19*

時間入力を24時間制にしてほしい。

## Most praised reviews (8 highest-rated)

### 5/5 — Timesheets

*2026-06-26*

Amazing Calculator - has everything I need to calculate my timesheets easily and accurately

### 5/5 — Приложение супер

*2026-03-22*

Шикарно работает

### 5/5 — 非常好用

*2026-01-15*

非常好用

### 5/5 — Accuracy Matters

*2026-01-10*

Excellent calculator for small business

### 5/5 — 신뢰성 업무에 유용하게 사용 중 입니다

*2024-01-18*

정말 잘 사용하고 있는 앱 입니다!
만들어 주셔서 감사합니다.

최근 “특정날짜에서 더하거나 빼기”에 
요일이 맞지 않는 것 같아요.
확인 해주심 감사하겠습니다!

### 5/5 — Makes my billing so much less of a headache

*2023-03-16*

Thanks. This app is simple but works perfectly. It gets my hours done accurately.

### 4/5 — Modification

*2024-06-18*

Bonjour, il serait bien de compter les heures jusqu’à 24.

### 3/5 — 複数登録と24時間制

*2025-10-08*

時間差を複数登録して管理したいので、複数の登録できること、24時間制もできるように選べると尚便利だと思いました。それができればいう事なしです。

---

*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 2026-08-28.*