# Stopwatch 4 Time Study vs Sheaf

The clearest difference is rating: Stopwatch 4 Time Study at 5.0 against Sheaf's 1.0. Stopwatch 4 Time Study also leads on in-app purchases (none vs 1). Sheaf's advantage is update cadence (every 3 days vs every 2 months) and iOS requirement (15.0 vs 18.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Sheaf sells 1 one-off in-app purchase. Stopwatch 4 Time Study asks for nothing beyond the download.

Stopwatch 4 Time Study holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Stopwatch 4 Time Study ships an update every 2 months, Sheaf every 3 days. Both last shipped on October 11, 2026.

## The numbers

| Metric | Stopwatch 4 Time Study | Sheaf |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stopwatch-4-time-study/id1324066291/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/sheaf-offline-ocr-and-documents/id6791053948/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Paid | **Freemium** |
| Size | 11 MB | 168 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Herzog](https://appshunter.io/developer/1324066290) | [闻俊 王](https://appshunter.io/developer/6790620480) |

## What reviewers say

### Stopwatch 4 Time Study

[App page](https://appshunter.io/ios/app/stopwatch-4-time-study/id1324066291)

This app helps record cycle times and perform simple time measurements. It offers automatic recording via accelerometer or camera, detailed statistical analysis, and data export options.

**Highlights:** 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)

**Features:** Vision Pro support

**In-app purchases:** none


### Sheaf

[App page](https://appshunter.io/ios/app/sheaf-offline-ocr-and-documents/id6791053948)

This app offers offline document scanning, OCR, and organization with reminders. It allows importing various file types, searching text, and managing records using categories and tags, all while prioritizing local data processing for privacy.

**Highlights:** Offline OCR in 12 languages, Import PDFs, Word, Excel, TXT, Full-text search, Category and tag organization, Local reminders, Local-first privacy, Optional iCloud sync

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sheaf Pro Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Stopwatch 4 Time Study free?

Stopwatch 4 Time Study is free to download, with no in-app purchases.

### Is Sheaf free?

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

### Which has better reviews, Stopwatch 4 Time Study or Sheaf?

Stopwatch 4 Time Study is rated higher. Stopwatch 4 Time Study averages 5.0 out of 5 from 1 ratings, while Sheaf averages 1.0 from 1 ratings.

### Do Stopwatch 4 Time Study or Sheaf have ads?

Neither Stopwatch 4 Time Study nor Sheaf shows ads.

### Which is updated more often, Stopwatch 4 Time Study or Sheaf?

Stopwatch 4 Time Study ships an update every 2 months, and Sheaf every 3 days. Most recently, Stopwatch 4 Time Study was updated on October 11, 2026 and Sheaf on October 11, 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.*