Best PDF App for iPhone in 2026 — Free + Power-User
By Taha Baalla··5 min read
The best PDF app for iPhone depends on your use case: reading and annotation (PDF Viewer, GoodReader), form filling (Adobe Acrobat), scanning physical documents (iOS built-in camera or Microsoft Lens), or building a searchable PDF library (Nemos).
PDF Reading and Annotation
PDF Viewer by PSPDFKit (free, Pro $4.99/month): clean interface, smooth rendering, annotation tools, form filling. Used by many professionals as the default PDF app. GoodReader ($5.99): veteran iOS PDF tool with powerful annotation, linking, multi-document split view, and excellent large-file handling. Best for power users with large PDF collections.
For PDF highlighting and note-taking that connects to a broader reading workflow: Readwise Reader ($8/month) handles PDFs alongside articles, with highlights syncing to Readwise.
PDF Scanning
iOS built-in Files app and Notes app both include a document scanner (tap + > Scan Documents). High quality results. No separate app needed. Microsoft Lens (free): excellent alternative with OneNote and SharePoint integration. Adobe Scan (free): integrates with Adobe Document Cloud.
PDF Library and Search
For a searchable PDF library across all saved documents: Nemos. Save any PDF via the iOS share sheet, and Nemos OCRs the full text, auto-titles the document, and makes every word searchable alongside all other saved content. Find a specific fact from a PDF you saved six months ago by searching the keyword.
This is different from a PDF viewer, which requires you to know which file contains the information. Nemos indexes the content of PDFs so you can search across your entire library without knowing which document holds what.
Decision Guide
- Need to annotate PDFs professionally: PDF Viewer Pro or GoodReader
- Need to fill PDF forms: Adobe Acrobat (free tier)
- Need to scan paper documents: iOS Notes built-in scanner
- Need to search across all saved PDFs: Nemos
Frequently asked
Is there a free option that's actually good?↓
Yes — every category has a free option that covers 80% of users. We name it first. Paid apps are recommended only when free apps clearly fall short.
Does this work on older iPhones?↓
Most recommendations work on iPhone 12 and later. AI features (Apple Intelligence) require iPhone 15 Pro or later, but we always provide a non-AI alternative.
More on PDFs
Pricing was last checked in August 2026 and is quoted per the vendor's own published rates at that time. Prices, tiers and free-tier limits change often — check the vendor's pricing page before deciding.