# Therblig — Time Study

> Industrial engineering time study stopwatch for work element analysis and standard time calculation. (iPhone/iPad app by Marcelo Maldonado.)

- Source: https://appshunter.io/ios/app/therblig-time-study/id6792123370 (this page in markdown: same URL + `.md`)
- Developer: [Marcelo Maldonado](https://appshunter.io/developer/6790241058)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2026-08-03
- Data updated: 2026-08-21
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/therblig-time-study/id6792123370/reviews.md

## What is Therblig?

Therblig is a stopwatch time study instrument built for industrial engineers — on the pick line, the packout wall, the assembly cell, anywhere work needs a standard.

Named for the elemental motions of Frank and Lillian Gilbreth, Therblig runs the classic continuous method end to end: break the job into elements, time cycles on the floor, rate performance, apply allowances, and read a statistically defensible standard time — all on the device in your hand.

THE CYCLE DIAL Every element becomes an arc on a live chronograph dial, sized by its observed mean. One revolution of the hand is one mean cycle, so you can see at a glance whether the operator is ahead of or behind pace. Lap with one thumb; the sequence advances itself.

BUILT FOR REAL FLOORS • Continuous-method timing — the master clock never stops, so nothing is lost • Out-of-sequence work: tap any element pad and the reading is credited correctly • Foreign elements capture interruptions without polluting your data • Undo removes a mis-tap and rewinds the sequence • Large touch targets that work at arm's length

STATISTICS YOU CAN DEFEND • Every reading plotted on a dot strip — outliers jump out; tap to exclude or restore • Sample-size check: n′ for ±5 percent precision at 95 percent confidence, per element • Coefficient of variation, standard deviation, and cycle-time trend per element • Coverage meter tells you plainly: sample sufficient, or keep timing

FROM OBSERVED TIME TO STANDARD • Performance rating per element, by hand or with the built-in Westinghouse leveling guide (skill, effort, conditions, consistency) • PFD allowances applied study-wide • Standard time, standard minutes, and units per hour — recalculated live • Frequency handling for irregular elements (a pallet change once every ten cycles is 0.1)

YOUR DATA, YOUR SPREADSHEET Export any study as a clean CSV — study header, full results table, and every raw reading — ready for Excel and your labor-management system. Everything stays on your device: no account, no sign-in, no data collection.

FREE TO START, ONE PURCHASE FOREVER The free version includes two complete studies with every feature — enough to run a real study and trust the tool. Therblig Pro unlocks unlimited studies with a single one-time purchase. No subscription. Your stopwatch never stops working.

Built by people who care about work measurement, for the engineers who set the standard.

## Key features

- Continuous method timing
- Cycle dial for pace tracking
- Out-of-sequence work capture
- Statistical analysis and outlier detection
- Performance rating with leveling guide
- PFD allowance application
- CSV data export

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Therblig — Time Study | $39.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/therblig-time-study/id6792123370/reviews.md

### 5/5 — Must have for Production Line Improvement

*2026-08-19*

This time study app is intuitive and easy to use. It helps me identify opportunities to improve efficiency and optimize our production line.

## Frequently asked questions about Therblig

### What is Therblig used for?

Therblig is a time study instrument for industrial engineers. It helps in breaking down jobs into elements, timing cycles, rating performance, and calculating statistically defensible standard times.

### How does Therblig's cycle dial work?

The cycle dial displays each work element as an arc, sized by its observed mean. One revolution of the hand represents one mean cycle, allowing users to quickly see if the operator is ahead of or behind pace.

### Can Therblig handle interruptions or errors?

Yes, Therblig can capture foreign elements to account for interruptions without affecting your main data. It also features an 'undo' function to remove mis-taps and rewind the sequence.

### What statistical features does Therblig offer?

Therblig plots every reading on a dot strip for outlier identification, offers sample-size checks for precision, and calculates coefficient of variation, standard deviation, and cycle-time trends per element.

### How is performance rating handled in Therblig?

Performance rating can be done manually or using the built-in Westinghouse leveling guide, which considers skill, effort, conditions, and consistency for each element.

### What are the pricing options for Therblig?

Therblig is free to start, offering two complete studies with all features. Therblig Pro unlocks unlimited studies with a single, one-time purchase, with no subscription required.

### What devices does Therblig support?

Based on the available data, Therblig is supported on iPhones.

### How often is Therblig updated?

The latest version of Therblig is 1.4, and it was last updated on August 11, 2026. This indicates a recent update, suggesting ongoing development and support.

## Version history (last 3 releases)

### 1.5 — 2026-08-19

Bug fixes when unlocking the pro version.

### 1.4 — 2026-08-11

- An interactive guided tour — take it anytime from the ? button. 
- Haptic button with sound click.

### 1.3 — 2026-08-03

No release notes.

## Related topics

[artitex time study](https://appshunter.io/ios/topics/artitex-time-study) · [production time study](https://appshunter.io/ios/topics/production-time-study)

---

*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 2026-08-21.*