# Onetime. vs World Clock Pro

The clearest difference is rating: World Clock Pro at 4.8 against Onetime.'s 3.5. World Clock Pro also leads on update cadence (every 2 months vs every 11 months) and review sentiment (77% vs 51%). Onetime.'s advantage is in-app purchases (none vs 6). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. World Clock Pro sells 5 in-app purchases, starting at $1.99 per month. Onetime. asks for nothing beyond the download.

World Clock Pro holds the better App Store score, 4.8 against 3.5. That said, the two scores are not equally well evidenced: World Clock Pro has 1.3K ratings behind it against 39, so its average is the more settled of the two. Written reviews point the same way: 51% of Onetime.'s written reviews are positive against 77% of World Clock Pro's.

Onetime. ships an update every 11 months, World Clock Pro every 2 months. The most recent releases landed on September 17, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Onetime. | World Clock Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (39 ratings)](https://appshunter.io/ios/app/onetime/id921569664/reviews) | **[4.8 (1.3K ratings)](https://appshunter.io/ios/app/world-clock-pro-convert-time/id969635117/reviews)** |
| Number of ratings | 39 | **1.3K** |
| Positive reviews | 51.5% of reviews | **76.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 months** |
| Monetization | **Free** | Subscription |
| Size | 2 MB | 41 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FLUID Design GmbH](https://appshunter.io/developer/921569663) | [Alex Komarov Inc.](https://appshunter.io/developer/364741805) |

## What reviewers say

### Onetime.

[App page](https://appshunter.io/ios/app/onetime/id921569664)

Visualize multiple world time zones on a single, intuitive dial. This app simplifies international scheduling and communication by displaying cities as they move through day and night, automatically handling daylight saving changes. Effortlessly find the perfect time for calls or to connect with loved ones globally.

**Highlights:** Single, easy-to-read time zone dial, Visualizes cities moving through day and night, Automatic daylight saving time adjustments, Timetravel™ feature for scheduling, Shareable time invites

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- ✨ Beautiful and elegant design
- 👍 Intuitive and easy to use interface
- 🌍 Great for visualizing time differences
- 💡 Unique and innovative visualization
- ✅ Works well for scheduling

**What reviewers complain about**

- 🐛 Data quality issues (incorrect times)
- 🐛 Inability to add cities
- 🐛 App crashes or freezes
- 🐛 City search not working
- 🐛 Some cities not recognized

**Reported bugs**

- Incorrect time zone data for some cities (e.g., Taipei, São Paulo)
- App freezes when trying to add cities
- City search function not working ('No cities found')
- App crashes on launch after updates
- Time travel feature stops working with certain cities

**Requested features**

- Ability to add descriptive labels for cities
- Ability to add GMT/UTC time
- Ability to add time zones manually
- Homescreen widgets
- Ability to toggle cities instead of removing


### World Clock Pro

[App page](https://appshunter.io/ios/app/world-clock-pro-convert-time/id969635117)

Easily track and convert time across multiple global time zones. Schedule events, share accurate times instantly, and access a vast database of cities and time zones. Ideal for international communication and planning.

**Highlights:** Universal clock access, Effortless time conversion, Schedule calendar events, Instant time sharing, Large city and timezone database, Automatic timezone updates

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month | $1.99 | per month |
| 1 month | $2.99 | per month |
| 1 year | $9.99 | per year |
| 1 year | $11.99 | per year |
| 1 year | $19.99 | per year |

**What reviewers like**

- 🚀 Elegant and intuitive interface
- 🔍 Excellent visualization of multiple time zones
- ⏱ Seamless time shifting
- 🌍 Convenient for international teams and travelers
- 📆 Helpful for scheduling across time zones

**What reviewers complain about**

- 🐛 Widget issues and lack of functionality
- 🖥 Lack of iPad and landscape mode support
- 🔧 Concerns about app updates and feature removals
- 💰 Complaints about subscription model and pricing

**Reported bugs**

- Widget not working on iOS 14 and newer
- Issues with local time zone detection and display
- Inconsistent behavior after app updates

**Requested features**

- Add date function for future time zone changes
- Ability to customize and sort displayed time zones
- Implement an Apple Watch app
- Improve widget functionality and customization


## Frequently asked questions

### Is Onetime. free?

Onetime. is free to download, with no in-app purchases.

### Is World Clock Pro free?

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

### Which has better reviews, Onetime. or World Clock Pro?

World Clock Pro is rated higher. Onetime. averages 3.5 out of 5 from 39 ratings, while World Clock Pro averages 4.8 from 1.3K ratings.

### Do Onetime. or World Clock Pro have ads?

Neither Onetime. nor World Clock Pro shows ads.

### Which is updated more often, Onetime. or World Clock Pro?

Onetime. ships an update every 11 months, and World Clock Pro every 2 months. Most recently, Onetime. was updated on September 17, 2026 and World Clock Pro on September 3, 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.*