Most free PDF readers available on the official App Store are safe to use. But before downloading, verify the following information:
- Reviews. User reviews can alert you to any potential security issues or concerns about an app.
- Developer information. Check the developer’s credibility. Apps from well-known developers or companies are generally safer.
- Updates. Ensure the app receives regular updates. This not only adds new features but also addresses security vulnerabilities.
- PDF Expert, developed by Readdle, has a client base of 30 million users, making it not only one of the most popular PDF readers but also one of the most trusted.