# Folium: PDF & Handwriting — Take Notes, Sign, Fill & Edit

> Take Notes, Sign, Fill & Edit (iPhone/iPad app by WEICHUNG LAI.)

- Source: https://appshunter.io/ios/app/folium-pdf-and-handwriting/id6819547697 (this page in markdown: same URL + `.md`)
- Developer: [WEICHUNG LAI](https://appshunter.io/developer/6812951859)
- Category: Productivity, Business
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 89 MB
- Languages: American English, Japanese, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-10-22
- Data updated: 2026-10-29

## What is Folium?

Folium is a PDF app for iPhone, iPad, and Mac: handwritten notes, signatures, forms, text editing, scanning, and Word and Excel conversion in one place. It all happens on your device, so your documents stay with you.

■ Sign
Sign with your finger or Apple Pencil and save your signature for next time. For formal needs, use a certificate-based digital signature with a timestamp and long-term validation (LTV).

■ Fill Forms
Fill in forms that have fields. For scanned forms without fields, Folium finds the boxes, lines, and checkboxes for you to fill in.

■ Edit Text
Spot a typo? Tap it and fix it, no source file needed. You can also replace or insert images and add text.

■ Handwriting & Annotations
Pen, highlighter, text boxes, notes, shapes, and stamps. Pause at the end of a stroke to turn lines, arrows, circles, and rectangles into clean shapes. On iOS 27 and later, handwriting is searchable too.

■ Scan
Scan paper into PDFs with the camera. After text recognition (OCR), you can search, select, and copy text in scans.

■ Organize Pages
Reorder, rotate, delete, insert, and merge pages, or copy pages from another document. On iPad and Mac, drag in a PDF or image to add pages.

■ Library
Sort documents into folders and tag them “To Sign” or “Done.” Folders are real iCloud Drive folders, matching the Files app and Finder. Search covers the text inside PDFs; tap a result to jump to the page.

■ And More
Word and Excel conversion, Office to PDF, redaction, remove hidden info, passwords and permissions, page numbers and watermarks, crop and split pages, compare, compress, Shortcuts, and batch processing. On Mac, present full screen; with a projector or second display connected, your own screen shows the next page, elapsed time, and all pages.

■ iPhone, iPad, and Mac
Sign and fill forms on iPhone; write notes with Apple Pencil on iPad. On Mac, use menus, keyboard shortcuts, and multiple windows, or open a PDF from Finder and edit it in place with automatic saving. Documents sync through your own iCloud, and edits to the same document on two devices are merged.

■ Edit Without Worry
Your imported PDF is kept untouched, every step can be undone, and you can go back to an earlier version. Folium compares every page visually before saving to the original file. On already-signed PDFs, changes are appended so the signed content stays intact.

■ Privacy
No account, no ads, no analytics or tracking. OCR, handwriting recognition, conversion, and text editing happen on your device. Folium only goes online for signature timestamps and certificate checks, and sends only a hash and certificate details, never your document.

■ Free and Folium Pro
Free, with no document limit or watermarks: reading and search, handwriting and annotations, handwritten signatures, form filling, page organizing, scanning, folders and tags, iCloud sync and version history, exporting, and saving to the original file.
Folium Pro unlocks text and image editing, certificate signatures, form field creation, page numbers and watermarks, text recognition, Word and Excel conversion, redaction and encryption, compare and compress, and batch processing. It’s a one-time purchase with no subscription: buy once, use it forever. One purchase covers iPhone, iPad, and Mac, and works with Family Sharing.

Certificate signatures use the standard PDF signature format. Certificates you create in Folium aren't issued by a government or certificate authority; whether a signature is accepted depends on local laws and what the recipient requires.

Requires iOS/iPadOS 17 or later, or macOS 14 or later on a Mac with Apple silicon. Text recognition needs iOS 18/macOS 15 or later; handwriting search needs iOS 27/macOS 27 or later.

Privacy Policy: https://chung223.github.io/folium/privacy/#english
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Folium Pro (Lifetime) | $29.99 | one-time |


## Is Folium safe?

Not enough ratings yet to assess Folium.

## Is Folium legit?

Folium: PDF & Handwriting appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Folium is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.1 — 2026-10-26

• Folium is now available in English, Simplified Chinese, and Japanese, with built-in Simplified Chinese and Japanese fonts for editing text and adding text, stamps, and watermarks.
• Export as Images is now in the Export menu (on iPhone, under More). Export all pages or just the current one.
• Printing picks portrait or landscape to match each page.
• See more of the page while filling forms or editing text: banners step aside, the form panel no longer covers the field you’re filling, and on short screens the title bar hides.
• Documents opened in their own window now have a Library button, and opening a document that’s already open in another window switches to it.

### 1.0 — 2026-10-23

No release notes.

## More apps by WEICHUNG LAI

- [Pastee – Clipboard History](https://appshunter.io/ios/app/pastee-clipboard-history/id6814187982)
- [Presence Remote](https://appshunter.io/ios/app/presence-remote/id6822611221)

All apps by WEICHUNG LAI: https://appshunter.io/developer/6812951859

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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 2026-10-29.*