# ChangeProof: Compare PDFs — Compare PDF revisions

> Compare PDF revisions (iPhone/iPad app by VS Co., Ltd..)

- Source: https://appshunter.io/ios/app/changeproof-compare-pdfs/id6791528286 (this page in markdown: same URL + `.md`)
- Developer: [VS Co., Ltd.](https://appshunter.io/developer/1895035652)
- Category: Productivity, Business
- Price: $7.99
- Age rating: 4+
- Requires: iOS 18.0 · 5 MB
- Languages: American English, Arabic, Danish, Dutch, Finnish, French (France), German (Germany), Hindi, Indonesian, Italian and 12 more
- Released: 2026-07-22
- Data updated: 2026-08-07
- User reviews in markdown: https://appshunter.io/ios/app/changeproof-compare-pdfs/id6791528286/reviews.md

## What is ChangeProof?

Compare PDF revisions without creating an account or uploading documents. Start with Version A and Version B, then keep later PDFs in the same local revision timeline and compare any two stored revisions. ChangeProof aligns pages, extracts embedded text, supplements image-only and uncovered scanned regions with on-device Vision OCR, and checks rendered page visuals. Large PDFs are processed progressively, with unchanged work reused from a bounded local cache. Review additions, removals, replacements, page changes, and visual differences in the draggable lens; mark each Pending, Expected, Flagged, or Ignored and add notes. Reopen local projects and export a redline PDF, CSV log, or JSON archive containing source hashes, revision lineage, comparison snapshots, review state, and limitations. No account, backend, cloud sync, analytics, advertising, tracking, external AI, or document upload. One paid download; no in-app purchases or subscriptions. Results assist review and do not guarantee completeness. Verify important revisions against the source PDFs.


## Version history (last 2 releases)

### 1.2 — 2026-08-06

Version 1.2 adds local multi-revision timelines and compare-any-pair workflows, progressive large-PDF analysis with reusable local cache, and on-device OCR for image-only and mixed-content regions. Exports now preserve revision lineage and comparison snapshots. Existing projects migrate automatically.

### 1.0 — 2026-07-23

No release notes.

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All apps by VS Co., Ltd.: https://appshunter.io/developer/1895035652

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-07.*