Comparison

PDF Reader vs Aviation eLog Book

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

Head to head
About

PDF Reader

This app offers a superior PDF reading experience with its innovative Liquid Mode, which optimizes documents for mobile screens. It also provides robust tools for annotating, signing, managing, and sharing your PDF files, catering to both work and study needs.

Highlights
  • Liquid Mode for optimized mobile reading
  • Annotation tools (pencil, text, highlighting)
  • Handwritten signature insertion
  • File management (move, merge, copy, delete)
  • Cloud service integration (Wondershare, iCloud)
  • Create blank PDFs and folders
Features
Read full description

PDFelement - PDF Reader is a PDF reader using the latest technology. The newly connected Liquid Mode function allows you to enjoy the best reading experience. In addition, there are various annotation tools, file management, signature, Various functions such as cloud services can meet your PDF needs in work and study. PDF VIEWER • Liquid Mode gives you the best PDF reading experience • Star files to find them quickly • Easily locate recently accessed files in the "Recent" list. • Enter the page number to navigate to the desired page for viewing LIQUID MODE • Get the best PDF Reading experience with Liquid Mode • PDF document fully fits the mobile phone screen, no need to zoom in and out repeatedly. • Easily adjust brightness, font size,style, and spacing. ANNOTATE • Using Pencil to annotate like writing on the paper • Add text annotations, freely modify the text and background, border colors, choose the appropriate font and font size. • Supports many annotating tools like highlighting, underlining, squiggly lines, or strikethroughs. MANAGE • Move, merge, copy or delete files SIGNATURE • Enables handwritten signatures to be inserted anywhere within the document, while also offering the ability to zoom in and out for greater flexibility. • Built-in commonly used stamps CREATE • Quickly create completely blank PDF documents • Creat blank folders. SHARE • Sharing document content with others is just a click away with capture feature. • Select sentence(s) or pragraph(s) to share CLOUD SERVICE • PDF Reader supports uploading or downloading docs via computer, Wondershare document cloud and iCloud. Please note that this app only supports editing native PDF files. It does not support editing scanned or raster PDF. If you find you cannot edit text in PDF, please check if it is scanned PDF. Thank you! ---------------------------------------------------------------------------------------- Need HELP? Please contact us! We'll feedback to you ASAP. Email: pdfelement@wondershare.com Support Center: http://support.wondershare.com Forum: http://forum.pdf.wondershare.com Official Website: https://pdf.wondershare.com If you think this App helps you, your positive review in the App Store would be much appreciated.

About

Aviation eLog Book

This digital logbook replaces physical aviation logs, allowing pilots to easily record and access flight details. It offers quick summaries of flight times, totals, and search capabilities for specific entries, with export and printing options for data backup.

Highlights
  • Digital flight time recording
  • Calendar and logbook views
  • Monthly and grand total hours
  • Searchable trip and endorsement logs
  • Export to CSV, TAB, XLS
  • Print to PDF
  • Flight time calculator
Features
Read full description

For way too long aviators have had to maintain a physical log book to record their flight times. While this works it's not handy, you can only refer to it when the book is with you and calculating totals can be cumbersome.   Instead, this aviation log book keeps things simple, you can quickly see your log entries in calendar view or switch to logbook view, the choice is yours.   At a glance you can see your months totals, your grand total life hours to date or you can search on any trip, any copilot or passenger, any note or endorsement without having to scramble thru a physical log book.   The log book contains totals of Flight Time, single engine, multi-engine, helicopter, glider, day/night landings, instrument time, sim time, solo, PIC, SIC, dual times as a standard paper log book would track. You can even quickly check how many hours you've logged per aircraft identifier - it's easy. Not sure you're comfortable having your logbook on a device instead of paper, concerned that somehow you'll loose your information?? That was my concern too, so I've incorporated an export feature that lets you export all the information into any format you wish, CSV, TAB, XLS etc. - Simply export your log records as often as you'd like as a backup. You can also print your logbook at anytime to PDF or your printer, this way your information is always safe. For those who would like an easy way to calculate their flight time and air time I've incorporated a flight calculator that helps with that. Hopefully you find it as helpful as I have. Cheers. Please note: This is a standalone app, please install it on one device ie iPhone or iPad, not both as the data is not shared.

Screenshots

PDF Reader4 screens
Aviation eLog Book4 screens

Verdict

The call

The clearest difference is price: PDF Reader at Free against Aviation eLog Book's $3.99. PDF Reader also leads on update cadence (every 2 months vs every 4 months). Aviation eLog Book's advantage is review sentiment (100% vs 77%). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

PDF Reader is free to download; Aviation eLog Book costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PDF Reader ships an update every 2 months, Aviation eLog Book every 4 months. The most recent releases landed on November 9, 2026 and November 4, 2026 respectively.

Scorecard4 real differences · 6 level
PDF Reader versus Aviation eLog Book: the parameters behind the verdict, then further details
ParameterPDF ReaderAviation eLog Book
PriceFree — better$3.99
Rating4.3 (3.9K ratings) — better—
Positive reviews76.7% of reviews100.0% of reviews — better
Number of ratings3.9K — better—
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size173 MB113 MB
Age rating4+17+
DeveloperWondershare Technology (Hunan) Co.,Ltd.Terry Billingsley

Customer experience

PDF Reader

All ratings3,923 ratings
Positive83.1%
Neutral3.2%
Negative13.7%
Written reviews1,582 reviews
Positive76.7%
Neutral6.1%
Negative17.2%

Aviation eLog Book

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

PDF Reader

Reported bugs

4 issues
  • Text boxes appearing randomly
  • Inability to select/edit text in some PDFs
  • Scrolling issues and page loading delays
  • Incompatibility with certain PDF formats

Requested features

5 requests
  • Ability to edit text formatting (font, size, color)
  • Support for multiple open documents
  • Improved Apple Pencil integration
  • Bookmark/favorite feature for frequently used PDFs
  • Expanded cloud storage integration (OneDrive, Google Drive, etc.)

Aviation eLog Book

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

PDF Reader

No in-app purchases

None

Aviation eLog Book

No in-app purchases

Questions

Is PDF Reader free?
PDF Reader is free to download, with no in-app purchases.
Is Aviation eLog Book free?
Aviation eLog Book costs $3.99, with no in-app purchases.
Do PDF Reader or Aviation eLog Book have ads?
Neither PDF Reader nor Aviation eLog Book shows ads.
Which is updated more often, PDF Reader or Aviation eLog Book?
PDF Reader ships an update every 2 months, and Aviation eLog Book every 4 months. Most recently, PDF Reader was updated on November 9, 2026 and Aviation eLog Book on November 4, 2026.

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