# Lumin: View, Edit, Share PDF — Edit & share PDFs in the Cloud

> Cloud-based PDF editor for viewing, editing, sharing, and collaboration. (iPhone/iPad app by Nitrolabs Limited.)

- Source: https://appshunter.io/ios/app/lumin-view-edit-share-pdf/id1367372862 (this page in markdown: same URL + `.md`)
- Developer: [Nitrolabs Limited](https://appshunter.io/developer/1367372861)
- Category: Productivity, Business
- Price: Free
- Rating: 4.50/5 from 887 App Store ratings · 189 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 241 MB
- Languages: American English, French (France), German (Germany), Indonesian, Italian, Japanese, European Portuguese, European Spanish, Thai, Vietnamese
- Released: 2018-05-10
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/lumin-view-edit-share-pdf/id1367372862/reviews.md

## What is Lumin?

Lumin for iOS allows you to edit and sync to your Google documents in seconds. Collaborate with colleagues in real-time with a diverse set of editing tools.

Lumin auto-saves your changes and syncs them to all your devices. Connect your Google account and stay on top of your documents. You can effortlessly view and share files with anybody via email or shareable links.

TRUSTED BY MILLIONS
Join over 100 million Lumin users worldwide who use our app to edit, share, and collaborate in the cloud. From note-taking and project management to client onboarding and legal document review, Lumin empowers you across industries.

KEY FEATURES
- Seamless document management: Import from your favorite storage (Dropbox, Google Drive, OneDrive), edit, and share PDFs effortlessly.
- Cloud integration: Automatically save changes and sync across devices.
- Versatile editing tools: Highlight, annotate, draw on PDFs and more.
- Document organization: Organize, extract pages, merge files, convert to/from PDF,...
- Pre-designed templates: Choose from various templates for various purposes and industries, such as real estate, education, job application, etc.
- Collaboration: Share files and receive real-time notifications.
- eSignatures: Sign and fill out forms with ease.
- Scanning: Convert paper documents into portable PDFs.

LUMIN IN THE REVIEWS
“I use Lumin to mark up PDF drawings and send them to my subcontractors. In my role, time is of the essence. Lumin provides me with a tool to make collaboration and feedback easy.” – Construction site manager, US

“We have been using Lumin for a little over two years, and it's been amazing. Using Lumin on-the-go and in-office allows us better turnaround time for our patients' care.” – Director of Services and Operations, US

“It s very useful and handful for studying and I feel like they make good improvements with each upgrade. I use it for studying, it's cool that I can connect my university Google Drive to the Lumin account and I can edit, draw, write, highlight and add comments and they always get saved.” – Individual user

“Too loud. You can open and edit texts from any device, everything is saved automatically, quickly. Access is very fast. The options for editing documents are diverse.” – Individual user

Terms & conditions: https://www.luminpdf.com/terms-of-use/

## Key features

- Seamless document management
- Cloud integration and auto-save
- Versatile editing and annotation tools
- Document organization and conversion
- Pre-designed templates
- Real-time collaboration
- eSignatures and form filling
- Scanning to PDF

## What do users think of Lumin?

Overall sentiment: negative

**Pros**

- 🚀 Smooth performance
- 👍 Easy to use
- 💡 Useful annotation tools
- 🚀 Fast PDF rendering

**Cons**

- 🐛 Crashes and freezes
- 🔒 Unreliable data sync
- 💰 Expensive subscription
- 🐛 Buggy app experience

**Commonly reported bugs**

- Lost work and unsaved changes
- Inability to open/access files
- Frequent login issues
- Compatibility problems on mobile

**Most requested features**

- Offline mode support
- Split-screen functionality
- Improved highlight/annotation tools
- Better Google Drive integration

## Recent user reviews (10 of 189)

All indexed reviews: https://appshunter.io/ios/app/lumin-view-edit-share-pdf/id1367372862/reviews.md

### 1/5 — Terrible

*2026-07-01, version 5.4.1*

To sign a document just once, you’re forced to create an account and input your cc info. This guarantees a free trial. But when you try to cancel it, it’s impossible. Typing out the process requires a a full days work. To keep it short, don’t use

### 4/5 — Good for schoolwork

*2026-05-28, version 5.3.4*

This App is good for schoolwork (especially English for me) 
However the colours in the highlight/draw do not automatically save upon changing which is really annoying because I would like to have the 3-4 colours saved so that I can apply the colour scheme even if I do not finish the annotations in one go
Overall nice app - but could do with some minor improvements

### 1/5 — Actual Thieves

*2026-04-17*

This is the worst decision you can make. This service costs $30 and they do not let you cancel it. I have tried probably 10 times now and contacted customer service. They tell me it is cancelled but I still get charged $30 a month. You would have more fun and get more use out of lighting $360 on fire once a year. The people who run this company should serve time.

**Developer response:** Hi there, 

I'm sorry to hear about your experience. I would be happy to look into this for you. 

Please contact me on ella.james@luminpdf.com and I can look into your account and charges to cancel. 

I look forward to hearing from you.

### 1/5 — They stole my private data.

*2026-03-06, version 5.2.2*

Don't upload anything, they also withdrew money from my account without my permission.

### 5/5 — Works Great

*2026-03-02, version 5.2.1*

Does exactly what I need.

### 1/5 — Hate this.

*2026-02-16, version 5.2.1*

Stick with a subscription, can’t figure out how to bleeping cancel it. 😬😡

### 5/5 — In my experience

*2026-02-09, version 5.1.0*

Best edit app out there!!! Five Stars!!!

### 1/5 — Save your time and space

*2026-01-13, version 4.9.1*

This app and their website has so much potential and they lack the ability to fix the glitches and lack of fixing everything that is wrong with both. I gave up and I’m switching back to adobe unfortunately.

### 5/5 — Useful app

*2026-01-09, version 4.9.1*

Help me a lot with viewing and editing pdf

### 5/5 — BEST PDF EDITOR APP

*2026-01-08, version 4.9.0*

I like the app very much , it is intuitive, user friendly layout.

## Frequently asked questions about Lumin

### What does Lumin do?

Lumin is a cloud-based application that allows users to view, edit, share, and collaborate on PDF documents. It provides a comprehensive set of tools for annotating, organizing, signing, and converting PDFs, with seamless integration to cloud storage services.

### What are the key features of Lumin?

Key features include seamless document management with import from various cloud storage providers, cloud integration for auto-saving and syncing across devices, versatile editing and annotation tools, document organization options like merging and page extraction, pre-designed templates, real-time collaboration, eSignatures, and scanning capabilities to convert paper documents into PDFs.

### Is Lumin free to use?

The application is free to download and use, offering a range of features. However, it also includes in-app purchases for advanced functionalities or to unlock premium features, aligning with a freemium monetization model.

### What devices is Lumin compatible with?

Lumin is available for iOS devices, allowing users to edit and sync their documents. The app's cloud integration ensures that changes are saved and synced across all connected devices, providing access from anywhere.

### How can Lumin be used for collaboration?

Lumin facilitates real-time collaboration by allowing users to share files with colleagues and receive instant notifications. This enables multiple users to work on documents simultaneously, making feedback and project management more efficient.

## Version history (last 5 releases)

### 5.6.0 — 2026-08-22

- Bug fixes and stability improvements

### 5.5.4 — 2026-08-14

- Bug fixes and stability improvements

### 5.5.3 — 2026-08-10

- Bug fixes and stability improvements

### 5.5.2 — 2026-08-01

- Bug fixes and stability improvements

### 5.5.1 — 2026-07-20

- Bug fixes and stability improvements

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## More apps by Nitrolabs Limited

- [Lumin Sign: Fill and eSign PDF](https://appshunter.io/ios/app/lumin-sign-fill-and-esign-pdf/id1546702847)
- [Lumin for BlackBerry](https://appshunter.io/ios/app/lumin-for-blackberry/id6463794787)
- [Wyatt AI](https://appshunter.io/ios/app/wyatt-ai/id6777981671)

All apps by Nitrolabs Limited: https://appshunter.io/developer/1367372861

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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 2026-08-24.*