# STS vs PDF Reader

The clearest difference is rating: STS at 5.0 against PDF Reader's 4.0. STS also leads on in-app purchases (none vs 1) and ads (none vs shown). PDF Reader's advantage is update cadence (every 3 weeks vs every 5 months) and ratings volume (41 vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Reader sells 1 in-app purchase, starting at $14.99 per 7 days. STS asks for nothing beyond the download.

STS holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: PDF Reader has 41 ratings behind it against 1, so its average is the more settled of the two.

STS ships an update every 5 months, PDF Reader every 3 weeks. The most recent releases landed on October 12, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | STS | PDF Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sts-delivery/id6753799219/reviews)** | [4.0 (41 ratings)](https://appshunter.io/ios/app/pdf-reader-edit-and-ocr-scan/id6774545766/reviews) |
| Number of ratings | 1 | **41** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#115** |
| Size | 62 MB | 21 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SPECIALIZED TRANSPORT SYSTEMS INC](https://appshunter.io/developer/1845075247) | [Duc Duong Tran](https://appshunter.io/developer/1580090879) |

## What reviewers say

### STS

[App page](https://appshunter.io/ios/app/sts-delivery/id6753799219)

This app offers specialized logistics for transporting luxury furnishings with precision and care. It includes features for scheduled drop-offs, warehouse holding, and combined shipments, along with tracking and order inspection status.

**Highlights:** Luxury furnishing transport, Precise and careful handling, Advanced transport systems, Warehouse holding, Combined shipment options, Shipment tracking, Order inspection status

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

**In-app purchases:** none


### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader-edit-and-ocr-scan/id6774545766)

**Currently charting:** #115 Top Free · Productivity (US App Store)

Easily scan, read, edit, and manage PDF documents on your iPhone and iPad. Convert images to PDF, extract text with OCR, and sign your documents. Organize files with merging, splitting, and password protection.

**Highlights:** Scan documents with camera, Convert photos to PDF, Extract text with OCR, Edit and annotate PDFs, Sign documents, Merge and split PDFs, Password protection

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $14.99 | per 7 days |


## Frequently asked questions

### Is STS free?

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

### Is PDF Reader free?

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

### Which has better reviews, STS or PDF Reader?

STS is rated higher. STS averages 5.0 out of 5 from 1 ratings, while PDF Reader averages 4.0 from 41 ratings.

### Do STS or PDF Reader have ads?

PDF Reader shows ads; STS does not.

### Which is updated more often, STS or PDF Reader?

STS ships an update every 5 months, and PDF Reader every 3 weeks. Most recently, STS was updated on October 12, 2026 and PDF Reader 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.*