# ChronoRate — Watch accuracy and timegrapher

> Watch accuracy and timegrapher (iPhone/iPad app by Chieh Chung Tsou.)

- Source: https://appshunter.io/ios/app/chronorate/id6760379687 (this page in markdown: same URL + `.md`)
- Developer: [Chieh Chung Tsou](https://appshunter.io/developer/1884205861)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: Korean, German (Germany), European Spanish, American English, Japanese, Chinese (Simplified, China), Chinese (Traditional, Taiwan), French (France)
- Released: 2026-04-08
- Data updated: 2026-08-24
- User reviews in markdown: https://appshunter.io/ios/app/chronorate/id6760379687/reviews.md

## What is ChronoRate?

ChronoRate is a precision toolkit for mechanical watch enthusiasts who want to measure accuracy, monitor performance, record watch details, and manage their collection in one place.

Use atomic clock synchronization to record time deviation with confidence, then track each watch over time with clear trends and historical records. For deeper analysis, ChronoRate includes timegrapher tools to help you evaluate rate, beat error, amplitude, and overall movement performance.

ChronoRate also helps you keep a complete record of each watch, including movement caliber, lift angle, warranty dates, and service or oil maintenance history. The watch overview page brings key details together so you can quickly review the full profile of every watch in your collection.

Whether you are checking a newly purchased watch, comparing positions, following long-term changes in daily rate, or maintaining service records, ChronoRate helps you build a clearer picture of how your watches are performing over time.

Features:
• Measure watch accuracy with atomic clock sync
• Run timegrapher tests on your device
• Evaluate rate, beat error, amplitude, and movement performance
• Track historical performance and daily trends
• Manage your watch collection and individual records
• Record movement caliber, lift angle, warranty dates, and service history
• View a complete watch information overview page
• Check dynamic mechanical moon phase information
• View detailed statistics and performance insights
• Organize measurements by watch and timing round

ChronoRate is designed for collectors, hobbyists, and enthusiasts who want a practical and focused tool for understanding, recording, and maintaining mechanical watch performance.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro Upgrade | $7.99 | one-time |



## Version history (last 5 releases)

### 1.3 — 2026-08-16

What’s New in ChronoRate 1.3

• World Clock: Search and pin major cities to view precise NTP time, UTC offsets, and automatic daylight saving time updates.
• Second-hand styles: Tap the clock face to switch between a smooth mechanical sweep and a quartz-style tick.
• Time-setting cues: Turn them on from the upper-left corner and use five singing-bowl-inspired tones to set your watch more precisely.
• Added confirmation before deleting individual timing and timegrapher records.
• Improved localized layouts and overall stability.

### 1.2.1 — 2026-07-11

- Improved stability of the target time picker during timing records
- Fixed an issue where the selected target time could be reset after atomic time synchronization was completed
- Improved the timing record screen experience while the atomic clock display updates

### 1.2 — 2026-06-29

- Added a watch information overview page for quickly viewing complete watch details
- Added a dynamic mechanical moon phase display to the moon phase section
- Added warranty date calculation and service maintenance record features
- Added fields for movement caliber and lift angle records
- Added amplitude calculation support to the timegrapher
- Fixed minor issues and improved stability

### 1.1.2 — 2026-05-07

- Improved record display for clearer readability
- Unified parts of the display logic to reduce possible confusion

### 1.1.1 — 2026-05-06

- Fixed an issue that could affect usage in certain cases
- Improved stability and usability

## Apps similar to ChronoRate

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Watch Tracker - Collection](https://appshunter.io/ios/app/watch-tracker-collection/id6752223953) | — | Free | Utilities |
| [Watch Rate Checker](https://appshunter.io/ios/app/watch-rate-checker/id6744782470) | — | Free | Utilities |
| [TickTrackTock](https://appshunter.io/ios/app/ticktracktock/id6753081257) | — | $4.99 | Utilities |
| [Tickscope — Watch Accuracy](https://appshunter.io/ios/app/tickscope-watch-accuracy/id6761128998) | 4.6 (8) | Free | Utilities |
| [Isochron: Watch Accuracy](https://appshunter.io/ios/app/isochron-watch-accuracy/id6780989450) | — | Free | Utilities |
| [Oscillo: Watch Accuracy Meter](https://appshunter.io/ios/app/oscillo-watch-accuracy-meter/id6759264433) | 4.8 (18) | Free | Utilities |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*