# Time Calibrator vs StandBy Clock

The clearest difference is review sentiment: StandBy Clock at 100% against Time Calibrator's 33%. StandBy Clock also leads on rating (4.0 vs 2.7) and update cadence (every 6 days vs every 8 months). Time Calibrator's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, ratings volume and device support there is nothing between them.

Both are free to download. StandBy Clock sells 3 in-app purchases, starting at $1.99 per 7 days. Time Calibrator asks for nothing beyond the download.

StandBy Clock holds the better App Store score, 4.0 against 2.7. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews point the same way: 33% of Time Calibrator's written reviews are positive against 100% of StandBy Clock's.

Time Calibrator ships an update every 8 months, StandBy Clock every 6 days. The most recent releases landed on September 21, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Time Calibrator | StandBy Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (3 ratings)](https://appshunter.io/ios/app/time-calibrator/id786988278/reviews) | **[4.0 (6 ratings)](https://appshunter.io/ios/app/standby-clock-custom-widgets/id6450166379/reviews)** |
| Number of ratings | 3 | **6** |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 6 days** |
| Monetization | **Free** | Ad-supported |
| Size | 8 MB | 23 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Atomtime Suisse S.A.](https://appshunter.io/developer/786988281) | [逸文 周](https://appshunter.io/developer/1484299344) |

## What reviewers say

### Time Calibrator

[App page](https://appshunter.io/ios/app/time-calibrator/id786988278)

This utility app provides precise local time and date information by connecting to an atomic clock server in Switzerland. It utilizes quantum technology to transmit this data at the speed of light directly to compatible i-Atomic watches.

**Highlights:** Accurate global time and date, Connects to Swiss atomic clock server, Quantum technology data transmission, Direct communication to i-Atomic watches, Light signal synchronization

**Features:** macOS Compatibility

**In-app purchases:** none


### StandBy Clock

[App page](https://appshunter.io/ios/app/standby-clock-custom-widgets/id6450166379)

Transform your iPhone into a personalized bedside display with over 100 customizable widgets. Show time, calendar, battery, photos, and more. Simple to use, just choose, customize, and add to your StandBy screen.

**Highlights:** 100+ customizable widgets, Analog and digital clock options, Calendar and dual time zone display, Countdown timers for events, Photo and GIF widgets, Customizable theme colors and styles

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro | $1.99 | per 7 days |
| Annual Pro | $6.99 | per year |
| StandBy Clock Lifetime | $14.99 | one-time |


## Frequently asked questions

### Is Time Calibrator free?

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

### Is StandBy Clock free?

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

### Which has better reviews, Time Calibrator or StandBy Clock?

StandBy Clock is rated higher. Time Calibrator averages 2.7 out of 5 from 3 ratings, while StandBy Clock averages 4.0 from 6 ratings.

### Do Time Calibrator or StandBy Clock have ads?

StandBy Clock shows ads; Time Calibrator does not.

### Which is updated more often, Time Calibrator or StandBy Clock?

Time Calibrator ships an update every 8 months, and StandBy Clock every 6 days. Most recently, Time Calibrator was updated on September 21, 2026 and StandBy 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.*