# Aspose.PDF vs Therblig

The clearest difference is rating: Therblig at 5.0 against Aspose.PDF's 3.9. Therblig also leads on review sentiment (100% vs 80%) and update cadence (weekly vs every 4 weeks). Aspose.PDF's advantage is in-app purchases (none vs 1) and ratings volume (15 vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Therblig sells 1 one-off in-app purchase. Aspose.PDF asks for nothing beyond the download.

Therblig holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Aspose.PDF has 15 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 80% of Aspose.PDF's written reviews are positive against 100% of Therblig's.

Aspose.PDF ships an update every 4 weeks, Therblig weekly. The most recent releases landed on October 24, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Aspose.PDF | Therblig |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (15 ratings)](https://appshunter.io/ios/app/asposepdf-converter-viewer/id1580359566/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/therblig-time-study/id6792123370/reviews)** |
| Number of ratings | **15** | 2 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Weekly** |
| Monetization | **Free** | Freemium |
| Size | 42 MB | 2 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Aspose Pty Ltd](https://appshunter.io/developer/746299884) | [Marcelo Maldonado](https://appshunter.io/developer/6790241058) |

## What reviewers say

### Aspose.PDF

[App page](https://appshunter.io/ios/app/asposepdf-converter-viewer/id1580359566)

This application provides a comprehensive suite of tools for managing PDF files, including conversion, editing, optimization, and security features. It allows users to compress, merge, split, rotate, and protect PDFs, as well as convert them to and from various formats like Word, Excel, and images. The app also offers OCR capabilities and a PDF viewer.

**Highlights:** Compress PDF files, Merge and split PDFs, Convert PDF to Word, Excel, PPT, and images, Protect PDFs with passwords, Add watermarks and signatures, Scan documents to PDF, OCR for searchable PDFs

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

**In-app purchases:** none


### Therblig

[App page](https://appshunter.io/ios/app/therblig-time-study/id6792123370)

This app is a time study instrument designed for industrial engineers to measure work elements, rate performance, and calculate standard times. It offers a unique cycle dial for real-time pace tracking and robust statistical analysis tools. Data can be exported for further analysis in spreadsheets.

**Highlights:** 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

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

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


## Frequently asked questions

### Is Aspose.PDF free?

Aspose.PDF is free to download, with no in-app purchases.

### Is Therblig free?

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

### Which has better reviews, Aspose.PDF or Therblig?

Therblig is rated higher. Aspose.PDF averages 3.9 out of 5 from 15 ratings, while Therblig averages 5.0 from 2 ratings.

### Do Aspose.PDF or Therblig have ads?

Neither Aspose.PDF nor Therblig shows ads.

### Which is updated more often, Aspose.PDF or Therblig?

Aspose.PDF ships an update every 4 weeks, and Therblig weekly. Most recently, Aspose.PDF was updated on October 24, 2026 and Therblig on October 4, 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.*