# Onetime. vs Chrono

The clearest difference is rating: Chrono at 4.0 against Onetime.'s 3.5. Onetime.'s advantage is review sentiment (51% vs 38%) and ratings volume (39 vs 8). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Chrono holds the better App Store score, 4.0 against 3.5. Both are backed by a comparable volume of ratings — 39 and 8 respectively. Written reviews complicate that: 51% of Onetime.'s written reviews are positive against 38% of Chrono's, so the app with the better star average is not the one people write more warmly about.

Onetime. ships an update every 11 months, Chrono every 8 months. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Onetime. | Chrono |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (39 ratings)](https://appshunter.io/ios/app/onetime/id921569664/reviews) | **[4.0 (8 ratings)](https://appshunter.io/ios/app/chrono-world-clock/id1471913817/reviews)** |
| Number of ratings | **39** | 8 |
| Positive reviews | **51.5% of reviews** | 38.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 8 months** |
| Monetization | Free | Free |
| Size | 2 MB | 10 MB |
| Requires iOS | 13.0 | **12.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [FLUID Design GmbH](https://appshunter.io/developer/921569663) | [Sebastian Connan](https://appshunter.io/developer/1140112501) |

## 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


### Chrono

[App page](https://appshunter.io/ios/app/chrono-world-clock/id1471913817)

Easily track time across multiple global locations with this intuitive application. Manage a custom list of world clocks, add numerous locations, and even rename them for clarity. A convenient widget provides quick access to time information, helping you stay connected across different time zones.

**Highlights:** Manage a list of world clocks, Extensive location selection, Customizable clock names, Convenient widget, Timezone comparison, 24/12 hour format option

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Onetime. free?

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

### Is Chrono free?

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

### Which has better reviews, Onetime. or Chrono?

Chrono is rated higher. Onetime. averages 3.5 out of 5 from 39 ratings, while Chrono averages 4.0 from 8 ratings.

### Do Onetime. or Chrono have ads?

Neither Onetime. nor Chrono shows ads.

### Which is updated more often, Onetime. or Chrono?

Onetime. ships an update every 11 months, and Chrono every 8 months. Most recently, Onetime. was updated on September 30, 2026 and Chrono on October 1, 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.*