Pdf Sidekick vs Lonely PDF
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Pdf Sidekick
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Our core functions 1. We support scanning and taking photos, and you can automatically convert them to PDF files with just one tap 2. We have provided a sample preview PDF file for you in our product, and you can learn how to use our product through the sample we provided to help you get started quickly 3. Our product has powerful editing functions, allowing you to flip, crop, and edit the generated PDF files through our product 4. You can share the edited PDF files with your friends through our product sharing function We hope that you can feel a comfortable experience when using our products. We will update and iterate our products according to your needs, making the product process smoother and the product's functionality more powerful, meeting your needs
Lonely PDF
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Lonely PDF transforms any PDF document into your personal reading companion. Import lecture notes, reports, or research papers and enjoy a focused reading experience with an interface designed to mimic the feel of paper. Ask questions about the content and receive answers based directly on the textβcomplete with clickable page references so you can easily verify the information. Key Features β’ Import PDFs from the Files app and save them locally on your device β’ Supports continuous scrolling and an optional night mode β’ Flexible editing and document merging Privacy-First Design Your PDF files are stored within Lonely PDFβs isolated sandbox environment at all times. Designed for students, freelancers, and anyone who needs to read complex PDF documents while on the go.
Screenshots
Verdict
The clearest difference is update cadence: Pdf Sidekick at every 5 days against Lonely PDF's fortnightly. Pdf Sidekick also leads on iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Pdf Sidekick ships an update every 5 days, Lonely PDF fortnightly. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.
| Parameter | Pdf Sidekick | Lonely PDF |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days β better | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod β better | iPhone |
| Requires iOS | 13.0 β better | 17.0 |
| Further details β not scored | ||
| Size | 24 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | PIECES OF WOOD CO., LIMITED | RED STONE NETWORK TECHNOLOGY LIMITED |
In-app purchases
Pdf Sidekick
No in-app purchases
Lonely PDF
No in-app purchases









