WhatChanged helps you answer one question fast: what’s different?
Use one app across iPhone, iPad, and Mac to compare two files, two folders, or text and get a clear summary of changes.
On iPhone and iPad, start in the app or send two files from Files straight to WhatChanged. Perfect for backups, exports, cloud drives, builds, and any “did this copy match?” moment.
◼ How to use
• In the app
Open WhatChanged
Choose two files or two folders (Left and Right)
Tap Compare
• From the share sheet
In the Files app, or another app that can share files, select exactly two files
Tap Share → WhatChanged
The report opens in WhatChanged automatically
Tip:
The extension is best for file-to-file compare. To compare folders, open the main app.
• Direct Text Compare
Open the Text tab
Paste or type text on both sides
Compare instantly, without selecting files first
• Text Diff tools
Open a text diff from Direct Text Compare, a supported text file, or a folder-pair text diff
Use Copy Diff to copy a unified-diff-style result as plain text
Use Find in Diff to search inside the current diff, move between matches, and highlight matching rows
Review compact Diff Summary badges for total changes, modified rows, added rows, and removed rows
Read cleaner results on iPhone and iPad, with polished layout and no-difference states
• Safe Merge
Run a folder comparison
Open Safe Merge Preview
Choose a rule: Newest, Oldest, Smallest (New), Smallest (Old), Biggest (New), or Biggest (Old)
Review the output folder and safety preview
Tap Merge Now to copy the selected results into a new output folder
WhatChanged keeps the original folders unchanged
Successful merges include a generated README with the compared folders, selected rule, copied items, counts, output location, and safety notes
◼ Highlights
• Compare files and folders (left vs right)
• Folder compare with added, removed, modified, and renamed items
• Safe Merge for folder results
• Built-in text diff for Direct Text Compare, supported text files, and folder-pair results
• Copy Diff, Find in Diff, row highlighting, and Diff Summary badges
• Improved text diff performance for long text comparisons and large replacement blocks
• Optional SHA-256 verification for content-level certainty, with caching for faster re-checks
• Smart ignore rules: hidden items, extensions, names, and patterns
• Text-friendly options: ignore line endings and whitespace-only changes
• Preview supported files, keep recent comparisons, and export/share reports
• 25 languages, plus an optional in-app language override
◼ Safe by design
WhatChanged does not modify or delete your originals.
Comparisons are read-only. Safe Merge writes only to a new output folder after you confirm the merge and safety checks pass.
◼ Official website
Product information, support, privacy details, and terms are available here:
https://hazybyte.studio/whatchanged/
Requires iOS 16.6 or later.
Terms of Use:
https://hazybyte.studio/whatchanged/terms-of-use/
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