# Stopwatch 4 Time Study — Cycle Time & Work Measurement

> Productivity tool for cycle time recording and time study analysis. (iPhone/iPad app by Thomas Herzog.)

- Source: https://appshunter.io/ios/app/stopwatch-4-time-study/id1324066291 (this page in markdown: same URL + `.md`)
- Developer: [Thomas Herzog](https://appshunter.io/developer/1324066290)
- Category: Productivity, Utilities
- Price: Free (on sale, was $1.99)
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 8 MB
- Languages: American English
- Released: 2017-12-14
- Data updated: 2026-08-26
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/stopwatch-4-time-study/id1324066291/reviews.md

## What is Stopwatch 4 Time Study?

Stopwatch 4 Time Study is a professional yet easy-to-use app for recording, analyzing, and documenting cycle times on iPhone and iPad.

Features

* Display times in decimal minutes (1/100 min) or minutes and seconds
* Add, deactivate, reactivate, and delete individual measurements
* Record cycle times manually or automatically
* Automatic triggering using the accelerometer to detect movement or vibration
* Automatic triggering using the camera by comparing a reference image with the current image
* Define the number of parts produced per cycle
* Apply individual performance ratings to measurements
* Add notes and predefined reasons for interruptions
* Configure side buttons for convenient operation

Statistics and Analysis

* Parts per hour
* Average, range, minimum, and maximum
* Accuracy (epsilon) and standard deviation
* Number of valid measurements
* Estimated number of additional measurements required to reach the configured accuracy target
* Color-coded minimum and maximum values
* Distribution chart, individual-value chart, and boxplot
* Optional display or hiding of deactivated measurements
* Outlier analysis based on the 1.5 IQR rule

Managing Time Studies

* Rename and delete recordings
* Organize recordings in folders
* Move recordings between folders
* Sort recordings by name or date
* Search recordings
* Import and export time studies in the .sft format using the iOS Share Sheet
* Export measurement data as CSV with configurable decimal and value separators
* Create and restore complete ZIP backups

Reports and Sharing

* Generate comprehensive PDF time-study reports
* Include statistics, charts, individual measurements, and notes
* Share SFT, CSV, PDF, and ZIP files using the iOS Share Sheet

iPad and Process Flow

* Optimized split-view interface for iPad
* Perform standard time studies using the same features available on iPhone
* Import Process Flow projects prepared with the Stopwatch 4 TS Web App
* Record individual activities and complete production cycles
* Add part notes and interruption reasons
* Export completed Process Flow measurements while preserving the original project and folder structure

Additional Options

* Light and dark appearance
* Haptic feedback
* Optional prevention of automatic screen locking
* Configurable OEE, accuracy, performance-rating, and CSV settings
* Read-only access to existing legacy iCloud recordings

The legacy iCloud area is provided only for accessing and downloading existing cloud recordings. Uploading new recordings and sharing them using Sharing Keys are no longer supported.

## Key features

- Automatic recording via accelerometer/camera
- Detailed statistical analysis (OEE, averages, dispersion)
- Time recording with comments
- Export data via email (CSV) or PDF report
- Cloud sync and sharing
- Customizable views (black/white, color-coded values)

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/stopwatch-4-time-study/id1324066291/reviews.md

### 5/5 — Excellent stopwatch for timing events

*2019-11-12*

My use was to measure the cycle time of a running conveyor belt, taking multiple ‘laps’ of the belt. This app automatically averages the lap time and when multiplied with an accurate belt feet per minute- will give an accurate conveyor belt length. This app was great for this work.

## Frequently asked questions about Stopwatch 4 Time Study

### What is Stopwatch 4 TS used for?

Stopwatch 4 TS is designed for recording cycle times and performing simple time recordings. It offers advanced features for detailed analysis and data management.

### How does Stopwatch 4 TS record time automatically?

It can automatically record time using the device's accelerometer to detect vibrations or the camera for image comparison. This allows for hands-free time measurement.

### What kind of data analysis does Stopwatch 4 TS provide?

The app displays parts per hour, OEE-considered parts per hour, averages, dispersion, min/max values, epsilon, and standard deviation. It also tracks the number of measurements taken and needed.

### Can I export my time recordings from Stopwatch 4 TS?

Yes, you can export time recordings via email in CSV format or share a time study as a PDF report. Data can also be exported and imported via Apple's ShareSheet.

### Does Stopwatch 4 TS support cloud synchronization?

Yes, you can copy your time recordings to the cloud and share them using a 'SharingKey'. This allows for easy access and collaboration across devices.

### What devices is Stopwatch 4 TS compatible with?

Stopwatch 4 TS is available for iPhone, iPad, iPod, and Apple Watch, making it versatile for various Apple devices.

### How often is Stopwatch 4 TS updated?

The app was last updated on April 1, 2023, with version 1.6.5. This indicates regular maintenance and potential feature additions.

### What is the price of Stopwatch 4 TS?

Stopwatch 4 TS is a paid application, available for $1.99. This one-time purchase grants access to all its features.

## Version history (last 5 releases)

### 2.0.0 — 2026-08-19

The app has been fully migrated to SwiftUI and now features a modernised user interface. This version also introduces a native iPad experience with an optimised layout for larger screens and an integrated Process Flow. In addition, usability, stability and compatibility have been improved, along with various minor bug fixes.

### 1.6.5 — 2023-04-01

Minor bug fixes and design changes

### 1.6.4 — 2023-03-28

Minor Bug fix (It was possible to start with side buttons. That's shouldn't been possible)

### 1.6.3 — 2023-03-26

Side buttons are now freely assignable.
Minor bug fixes and improvements.

### 1.6.1 — 2022-02-15

Minor bug fixes

## Apps similar to Stopwatch 4 Time Study

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Cycle Time - stopwatch](https://appshunter.io/ios/app/cycle-time-stopwatch/id1539261157) | 3.3 (4) | Free | Productivity |
| [Flip Timer & stopwatch](https://appshunter.io/ios/app/flip-timer-and-stopwatch/id1304344207) | 4.6 (7,580) | Free | Productivity |
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| [Time Tracker & Management](https://appshunter.io/ios/app/time-tracker-and-management/id1438079949) | 3.8 (19) | Free | Productivity |
| [iDesign](https://appshunter.io/ios/app/idesign/id342790226) | 2.6 (84) | Free | Productivity |
| [Stopwatch plus Multiple Timer](https://appshunter.io/ios/app/stopwatch-plus-multiple-timer/id923834737) | 4.6 (187) | Free | Productivity |

## More apps by Thomas Herzog

- [My little canning helper](https://appshunter.io/ios/app/my-little-canning-helper/id1326599422)
- [Stopwatch 4 TS Lite](https://appshunter.io/ios/app/stopwatch-4-ts-lite/id1327941657)
- [Series Manager](https://appshunter.io/ios/app/series-manager/id1383860403)
- [MedsDiary](https://appshunter.io/ios/app/medsdiary/id1485600497)

All apps by Thomas Herzog: https://appshunter.io/developer/1324066290

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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 2026-08-26.*