# PDF Master vs ContractShield AI

The clearest difference is update cadence: ContractShield AI at every 3 days against PDF Master's every 2 months. PDF Master's advantage is iOS requirement (13.0 vs 15.1). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. PDF Master sells 13 in-app purchases, starting at $2.99 per 7 days and ContractShield AI sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for PDF Master against 5.0 for ContractShield AI. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

PDF Master ships an update every 2 months, ContractShield AI every 3 days. The most recent releases landed on October 26, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | PDF Master | ContractShield AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/pdf-master-editor-and-scanner/id1606486950/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/contractshield-ai/id6771313067/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 27 MB | 50 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [shellmob](https://appshunter.io/developer/1573900492) | [Sasha Estrada](https://appshunter.io/developer/1896777857) |

## What reviewers say

### PDF Master

[App page](https://appshunter.io/ios/app/pdf-master-editor-and-scanner/id1606486950)

This app is a comprehensive PDF tool for iPhone and iPad users. It offers editing, conversion, scanning, reading, and signing capabilities in a single, user-friendly interface. Streamline your document management for work, study, or daily tasks.

**Highlights:** Professional PDF editing and annotation, Convert PDFs to/from Word, Excel, PPT, Images, TXT, HD mobile scanner with OCR, Image to PDF conversion, Smooth PDF reader and file manager, Electronic and handwritten signatures

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Converter Premium Weekly | $2.99 | per 7 days |
| PDF Converter Premium Monthly | $3.99 | per month |
| PDF Converter Premium quarter | $4.99 | per 3 months |
| PDF Photos Premium Monthly | $4.99 | per month |
| PDF Converter Premium Yearly | $9.99 | per year |
| PDF Photos Premium Quarterly | $9.99 | per 6 months |
| PDF Photos Premium Yearly | $9.99 | per year |
| PDF Photos Premium Yearly | $12.99 | per year |
| PDF Photos Premium Yearly | $19.99 | per year |
| PDF Converter Premium Yearly | $25.99 | per year |
| PDF Converter Premium Lifetime | $14.99 | one-time |
| PDF Converter Premium Lifetime | $19.99 | one-time |
| PDF Converter Premium Lifetime | $29.99 | one-time |


### ContractShield AI

[App page](https://appshunter.io/ios/app/contractshield-ai/id6771313067)

Instantly analyze any contract, understand its risks, and get negotiation scripts to secure better terms. It extracts key dates and deadlines, offering plain-English explanations for complex clauses. Built with privacy in mind, your documents are analyzed and immediately discarded.

**Highlights:** AI-powered contract analysis, Risk scoring for clauses, Plain-English explanations, Negotiation script generation, Automatic deadline extraction, Secure document handling

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ContractShield Pro - Monthly | $9.99 | per month |
| ContractShield Pro – Annual | $71.90 | per year |
| ContractShield - Single Credit | $2.99 | one-time |
| ContractShield - 10 Credits | $14.99 | one-time |


## Frequently asked questions

### Is PDF Master free?

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

### Is ContractShield AI free?

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

### Which has better reviews, PDF Master or ContractShield AI?

PDF Master and ContractShield AI are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.

### Do PDF Master or ContractShield AI have ads?

Neither PDF Master nor ContractShield AI shows ads.

### Which is updated more often, PDF Master or ContractShield AI?

PDF Master ships an update every 2 months, and ContractShield AI every 3 days. Most recently, PDF Master was updated on October 26, 2026 and ContractShield AI 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.*