Comparison

Pdf Sidekick vs Lonely PDF

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Pdf Sidekick

Features
Read full description

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

About

Lonely PDF

Features
Read full description

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 textβ€”complete 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 PDF’s isolated sandbox environment at all times. Designed for students, freelancers, and anyone who needs to read complex PDF documents while on the go.

Screenshots

Pdf Sidekick4 screens
Lonely PDF2 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard2 real differences Β· 4 level
Pdf Sidekick versus Lonely PDF: the parameters behind the verdict, then further details
ParameterPdf SidekickLonely PDF
PriceFreeFree
Update frequencyEvery 5 days β€” betterFortnightly
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPod β€” betteriPhone
Requires iOS13.0 β€” better17.0
Further details β€” not scored
Size24 MB17 MB
Age rating4+4+
DeveloperPIECES OF WOOD CO., LIMITEDRED STONE NETWORK TECHNOLOGY LIMITED

In-app purchases

None

Pdf Sidekick

No in-app purchases

None

Lonely PDF

No in-app purchases

Questions

Is Pdf Sidekick free?
Pdf Sidekick is free to download, with no in-app purchases.
Is Lonely PDF free?
Lonely PDF is free to download, with no in-app purchases.
Do Pdf Sidekick or Lonely PDF have ads?
Neither Pdf Sidekick nor Lonely PDF shows ads.
Which is updated more often, Pdf Sidekick or Lonely PDF?
Pdf Sidekick ships an update every 5 days, and Lonely PDF fortnightly. Most recently, Pdf Sidekick was updated on November 10, 2026 and Lonely PDF on October 31, 2026.

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