Adobe Acrobat is the high-water mark of PDF editor apps, offering a comprehensive set of features for reviewing and editing PDFs, creating and completing forms, and collaborating on files. Adobe Acrobat pricing starts at $12.99/month (billed annually) for Acrobat Standard, which includes core PDF editing features, with advanced features available for $19.99/month. Preview is the best free PDF editor app for Mac users, offering a Markup Toolbar with tools to insert new text, redact sensitive information, add notes, highlight, underline, and strikethrough. Sejda offers simple edits for free, but its interface can be glitchy, and its paid subscription starts at $7.50/month. PDFelement is the best PDF editor app with AI-powered features, offering tools like ChatGPT, Translate PDF, and Proofread PDF. PDF Expert is a great option for editing on the go, with features like Enhance Scan, sync files across devices, and Reading mode. CloudConvert is not a PDF editor app but offers file conversion services for free or $9 (one-time payment) for 500 conversion credits.