# Date and Time Calculator Pro vs World Time Clock Master

The clearest difference is price: World Time Clock Master at Free against Date and Time Calculator Pro's $0.99. World Time Clock Master also leads on update cadence (fortnightly vs every 5 weeks). Date and Time Calculator Pro's advantage is in-app purchases (none vs 13) and review sentiment (89% vs 67%). On ratings volume, ads and device support there is nothing between them.

World Time Clock Master is free to download; Date and Time Calculator Pro costs $0.99 up front. World Time Clock Master sells 10 in-app purchases, starting at $2.99 per month. Date and Time Calculator Pro asks for nothing beyond the download.

Date and Time Calculator Pro holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 959 and 839 respectively. Written reviews point the same way: 89% of Date and Time Calculator Pro's written reviews are positive against 67% of World Time Clock Master's.

Date and Time Calculator Pro ships an update every 5 weeks, World Time Clock Master fortnightly. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Date and Time Calculator Pro | World Time Clock Master |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.8 (959 ratings)](https://appshunter.io/ios/app/date-and-time-calculator-pro/id582268389/reviews)** | [4.6 (839 ratings)](https://appshunter.io/ios/app/world-time-clock-master/id6448859727/reviews) |
| Number of ratings | **959** | 839 |
| Positive reviews | **88.9% of reviews** | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | **Free** | Subscription |
| Size | 3 MB | 236 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [山 钟](https://appshunter.io/developer/1289109809) | [Alex Komarov Inc.](https://appshunter.io/developer/364741805) |

## What reviewers say

### Date and Time Calculator Pro

[App page](https://appshunter.io/ios/app/date-and-time-calculator-pro/id582268389)

Calculate the precise time difference between any two dates and times, down to the second.  Easily determine future or past dates based on a specified duration. Ideal for tracking events, financial periods, or personal milestones.

**Highlights:** Calculate time distance between dates, Calculate days after a specific date, Calculate date before a specific date, Second-level precision, Period time calculation

**In-app purchases:** none

**What reviewers like**

- 👍 Extremely useful
- 👍 Great app
- 👍 Excellent tool
- 👍 Useful
- 👍 Perfect app

**What reviewers complain about**

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

**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

**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


### World Time Clock Master

[App page](https://appshunter.io/ios/app/world-time-clock-master/id6448859727)

Effortlessly manage multiple time zones with this app. Convert times instantly, schedule events, and view global clocks at a glance with interactive widgets. Features atomic accuracy and a vast database of locations.

**Highlights:** Multiple time zone display, Interactive time conversion, Event scheduling, Atomic time accuracy, Dynamic home screen widgets, List mode for text view, Real moon phases and sunrise/sunset

**Features:** Family Sharing

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month | $2.99 | per month |
| 3 months | $3.99 | per 3 months |
| 1 year | $11.99 | per year |
| 1 year | $11.99 | per year |
| 1 year | $11.99 | per year |
| 1 year | $19.99 | per year |
| Lifetime | $29.99 | one-time |
| Lifetime | $49.99 | one-time |
| Lifetime | $79.99 | one-time |
| Lifetime | $99.99 | one-time |

**What reviewers like**

- 🚀 Delightful scheduling assistance
- 👍 Feature improvement
- 👍 The best Timezone helper
- 👍 One of the best clocks around
- 👍 The Widget is so damn cool!

**What reviewers complain about**

- 🐛 Problemas al actualizar
- 🐛 Sticky signup interface
- 🐛 Demo not enough
- 🔒 NOT A FREE APP
- 💰 Terrible monetisation model compared to previous app

**Reported bugs**

- Lose all the registered locations after updating the app
- Sticky signup interface
- Widget doesn't work
- GMT and London currently have a 1 hour time difference between the two locations, but the app shows them the same time

**Requested features**

- Add the time difference in hours between the default location and other locations in both the widget and the app
- See my calendar events on the dial
- Make a paid tier that doesn't collect my data
- Add new event to a Calendar


## Frequently asked questions

### Is Date and Time Calculator Pro free?

Date and Time Calculator Pro costs $0.99, with no in-app purchases.

### Is World Time Clock Master free?

World Time Clock Master is free to download, with in-app purchases available.

### Which has better reviews, Date and Time Calculator Pro or World Time Clock Master?

Date and Time Calculator Pro is rated higher. Date and Time Calculator Pro averages 4.8 out of 5 from 959 ratings, while World Time Clock Master averages 4.6 from 839 ratings.

### Do Date and Time Calculator Pro or World Time Clock Master have ads?

Neither Date and Time Calculator Pro nor World Time Clock Master shows ads.

### Which is updated more often, Date and Time Calculator Pro or World Time Clock Master?

Date and Time Calculator Pro ships an update every 5 weeks, and World Time Clock Master fortnightly. Most recently, Date and Time Calculator Pro was updated on October 29, 2026 and World Time Clock Master on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*