# Time Calibrator vs Winder

The clearest difference is review sentiment: Winder at 100% against Time Calibrator's 33%. Winder also leads on rating (5.0 vs 2.7) and update cadence (every 5 days vs every 8 months). Time Calibrator's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On price, ratings volume and ads there is nothing between them.

Both are free to download. Winder sells 1 one-off in-app purchase. Time Calibrator asks for nothing beyond the download.

Winder holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 33% of Time Calibrator's written reviews are positive against 100% of Winder's.

Time Calibrator ships an update every 8 months, Winder every 5 days. The most recent releases landed on August 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Time Calibrator | Winder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (3 ratings)](https://appshunter.io/ios/app/time-calibrator/id786988278/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/winder-precision-clock/id6749173558/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 15 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Atomtime Suisse S.A.](https://appshunter.io/developer/786988281) | [IVAN ALEJANDRO MUNGUIA CRUZ](https://appshunter.io/developer/1829095431) |

## 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


### Winder

[App page](https://appshunter.io/ios/app/winder-precision-clock/id6749173558)

This app provides highly accurate time synchronization with atomic time servers. It features beautifully crafted, animated watch dials and optional sound cues for precise timekeeping. Designed for watch enthusiasts, it prioritizes privacy with no data collection.

**Highlights:** Atomic time synchronization (NTP), Drift strip for device offset, Continuous-sweep second hand, Analog and digital display options, 12 handcrafted, animated dial themes, Optional countdown sound cues, No data collection or tracking

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Winder Pro | $4.99 | one-time |


## Frequently asked questions

### Is Time Calibrator free?

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

### Is Winder free?

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

### Which has better reviews, Time Calibrator or Winder?

Winder is rated higher. Time Calibrator averages 2.7 out of 5 from 3 ratings, while Winder averages 5.0 from 2 ratings.

### Do Time Calibrator or Winder have ads?

Neither Time Calibrator nor Winder shows ads.

### Which is updated more often, Time Calibrator or Winder?

Time Calibrator ships an update every 8 months, and Winder every 5 days. Most recently, Time Calibrator was updated on August 24, 2026 and Winder on September 9, 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.*