# Smart PDF Compressor: Reduce — Shrink PDFs, Keep Quality

> Shrink PDFs, Keep Quality (iPhone/iPad app by Quan Dang.)

- Source: https://appshunter.io/ios/app/smart-pdf-compressor-reduce/id6757997785 (this page in markdown: same URL + `.md`)
- Developer: [Quan Dang](https://appshunter.io/developer/1868401962)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 18.0 · 1 MB
- Languages: American English
- Released: 2026-04-23
- Data updated: 2026-09-19
- User reviews in markdown: https://appshunter.io/ios/app/smart-pdf-compressor-reduce/id6757997785/reviews.md

## What is Smart PDF Compressor?

Compress PDF files instantly on your iPhone and iPad. Smart PDF Compressor reduces file sizes by up to 95% while maintaining readable quality — perfect for sharing via email, messaging apps, or cloud storage.

ALL PROCESSING IS LOCAL
Your documents never leave your device. No internet connection required, no cloud uploads, no data collection. Complete privacy guaranteed.

KEY FEATURES

- Smart Compression: Automatically detects scanned vs. digital PDFs and applies optimal compression settings
- Three Presets: Light (best quality), Standard (balanced), and Maximum (smallest file size)
- Batch Compression: Compress multiple PDFs at once with progress tracking
- Full Control: Adjust image quality, resolution (72-300 DPI), and grayscale conversion
- Side-by-Side Preview: Compare original and compressed versions before saving
- File History: Browse, preview, rename, and share all your compressed files
- Native iPad Support: Full iPad experience with tab bar navigation

HOW IT WORKS

1. Tap + to select a PDF from Files
2. Choose your compression level or customize settings
3. Tap Compress and see the results instantly
4. Share or save your compressed PDF

PERFECT FOR
- Reducing email attachment sizes
- Saving storage space on your device
- Compressing scanned documents
- Preparing files for upload to web forms
- Sharing large PDFs via messaging apps

Smart PDF Compressor uses Apple's PDFKit and advanced image processing to deliver fast, reliable compression without sacrificing readability.


## Version history (last 4 releases)

### 1.3 — 2026-09-18

A look at your own numbers, and a faster way to tell us what you think.

NEW
• Settings now shows what you have actually saved: how many PDFs you have compressed, which presets you use, and how much space it has added up to. It is worked out on your device from your own activity, and you can export it if you want it.
• A health summary in Settings reports crashes, hangs and launch times, so problems are visible rather than silent. It is gathered on the device and stays there.
• Telling us something is wrong now takes two taps instead of a review nobody reads.

None of this is uploaded. No filenames, no file contents, no identifiers — the app still collects no data at all, and every file is still compressed entirely on your device.

### 1.2 — 2026-09-13

Find any document in seconds, and a library that finally reads clearly.

NEW
• Search your compressed PDFs by filename
• History is grouped by Today, This Week, This Month and Earlier
• Redesigned rows put the space you saved front and centre, with filenames that no longer get cut off
• A new app icon

FIXED
• Opening a PDF could leave you stuck on a blank screen with no way back. This is fixed.
• Choosing a file now opens compression straight away, with no pause
• Cancelling now genuinely stops the work instead of finishing in the background
• The document preview no longer flickers while a screen updates
• When a PDF is already well optimised the app says so plainly, instead of reporting a saving it did not make
• Buttons throughout the app now announce themselves properly with VoiceOver
• Fixed the Rate button opening the wrong page

As always, every file is compressed entirely on your device. Nothing is uploaded, and nothing leaves your phone.

### 1.1 — 2026-09-05

• Refined Design: Crafted interface with high-contrast clarity presets and polished animations.
• Smart Clarity Presets: Balance file size and visual sharpness with Light, Standard, and Maximum modes.
• 100% On-Device Privacy: High-speed local compression without uploading documents to the cloud.
• Interactive Preview: Compare file savings side-by-side before sharing or saving.

### 1.0 — 2026-04-23

No release notes.

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## More apps by Quan Dang

- [img2pdf](https://appshunter.io/ios/app/img2pdf/id6762545311)
- [Little Red: It Works](https://appshunter.io/ios/app/little-red-it-works/id6807451822)

All apps by Quan Dang: https://appshunter.io/developer/1868401962

## Related topics

[pdf compression](https://appshunter.io/ios/topics/pdf-compression)

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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 2026-09-19.*