# Onetime. vs World Clock

The clearest difference is rating: World Clock at 4.8 against Onetime.'s 3.3. World Clock also leads on review sentiment (87% vs 51%) and update cadence (every 5 weeks vs every 11 months). Onetime.'s advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

World Clock holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: World Clock has 599 ratings behind it against 42, 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 87% of World Clock's.

Onetime. ships an update every 11 months, World Clock every 5 weeks. The most recent releases landed on October 20, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Onetime. | World Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (42 ratings)](https://appshunter.io/ios/app/onetime/id921569664/reviews) | **[4.8 (599 ratings)](https://appshunter.io/ios/app/world-clock-timezone-converter/id1425332311/reviews)** |
| Number of ratings | 42 | **599** |
| Positive reviews | 51.5% of reviews | **86.7% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 5 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 2 MB | 32 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [FLUID Design GmbH](https://appshunter.io/developer/921569663) | [Bokeria](https://appshunter.io/developer/1425332310) |

## 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

[App page](https://appshunter.io/ios/app/world-clock-timezone-converter/id1425332311)

Easily convert time zones and check the current time in any region worldwide. This tool helps you stay connected with friends abroad, manage international meetings, and plan travel by accurately displaying dates and times across different locations.

**Highlights:** Convert time zones freely, Search time in any area, Check time for friends abroad, Manage international conferences, Set up widgets, Set theme color, Set UTC and standard times

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and intuitive user interface
- 🆓 Free application with no paywall
- 🌍 Comprehensive timezone and city database
- ⚡ Fast app performance and quick load times
- 🔄 Automatic daylight saving time updates

**What reviewers complain about**

- 🐛 Widget displays incorrect or blank times
- 🐛 Time display stuck or frozen
- ⚠️ Daylight saving time handling issues
- 🐛 Night mode compatibility problems
- 🐛 Screen flickering when scrolling

**Reported bugs**

- Widget showing blank screen instead of times
- Widget time display stuck or frozen
- Incorrect time display after daylight saving changes
- Widget not working on night mode
- Screen flickering when scrolling

**Requested features**

- Alarm functionality for multiple timezones
- Larger widget size options (2x2, 3x3)
- Widget theme/color customization
- Seconds display in time
- Real-time minute updates


## Frequently asked questions

### Is Onetime. free?

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

### Is World Clock free?

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

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

World Clock is rated higher. Onetime. averages 3.3 out of 5 from 42 ratings, while World Clock averages 4.8 from 599 ratings.

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

World Clock shows ads; Onetime. does not.

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

Onetime. ships an update every 11 months, and World Clock every 5 weeks. Most recently, Onetime. was updated on October 20, 2026 and World Clock on October 19, 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.*