Comparison

PDF Scanner Converter Document vs Simple Double Memo

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

Head to head
About

PDF Scanner Converter Document

Transform your smartphone into a versatile document scanner and editor. Easily scan, convert, and manage various file types, including images to PDF. Features include PDF editing, signing, printing, a math equation solver, real-time ruler, and QR code scanning.

Highlights
  • Document scanning with smart edge detection
  • Convert images and documents to PDF
  • Edit PDFs with annotations and signatures
  • Import/export various file formats
  • Math equation solver
  • Real-time distance measurement
  • QR code scanner
Features
Read full description

PDF Scanner transforms your smartphone into a powerful and convenient document scanner. Designed for professionals and everyday users alike, this intuitive scanner app allows you to scan, convert, edit, and manage documents with ease. Whether you need a reliable photo to PDF convert scanner or a full-featured PDF file editor, this app has you covered. DOCUMENT SCANNING Quickly scan paper documents, passports, ID cards, books, invoices, images, receipts, or notes. Smart edge detection and auto-enhancement ensure sharp and clear scans every time, making this document scanner ideal for both personal and professional use. ADD FILES - IMPORT & EXPORT Import existing documents from your device, email, or cloud storage. Supported file formats include: DOC, DOCX, TXT, RTF, HTML, EML, XLS, XLSX, PPT, PPTX, HEIC, BMP, and GIF. Organize files in folders for easy access. Export documents in PDF, TXT, Word, DOC, and Excel formats with a single tap. PDF EDITOR Edit PDF files and other documents directly within the app: add annotations, highlight text, insert or delete pages, rearrange content, and more. You can also add a signature to documents for quick approvals or formal use. PDF CONVERTER Seamlessly convert between file formats like PDF, TXT, and DOC. The app also supports image to PDF conversion - turn any photo into a high-quality PDF document, either by capturing it instantly or importing from your gallery. Ideal for archiving handwritten notes, forms, printed pages, and more, with customizable layouts and page order. SHARE DOCUMENTS Easily share scanned or imported documents with others via email, messengers, or cloud services. Whether you're sending reports, forms, or notes, sharing is fast and secure across all major platforms. PDF PRINTER Print scanned or edited documents directly from your phone using wireless printing. Supports AirPrint and other major printing protocols for seamless and efficient output. MATH EQUATIONS SOLVER Scan handwritten math equations and receive instant solutions, making it a powerful tool for students, educators, and anyone working with mathematics. RULER - REAL-TIME DISTANCE MEASUREMENT Use your device’s camera to measure distances accurately in real-time. Ideal for everyday tasks, room planning, and quick measurements on the go. QR CODE SCANNER Instantly scan and read QR codes for websites, contacts, Wi-Fi access, and more - directly within the app. MOBILE SCANNER CONVENIENCE Lightweight and easy to use, this mobile scanner is the perfect companion for anyone who needs fast and flexible document processing on the move. Whether you’re scanning a contract, editing a report, sharing a file, or converting a picture to PDF, this all-in-one tool simplifies your workflow. With PDF Scanner, managing documents is faster, smarter, and always in your pocket. Privacy Policy: https://docs.google.com/document/d/1_gVbgNuVoVfi2gxRDBvuaW7gkLIK-9NsJrO-oZyQO7M/edit?usp=sharing Terms of Use: https://docs.google.com/document/d/1FxDm0HfJjuZkjaneoZ65kSczOu8pYVPjQ3VZ2tpLHNw/edit?usp=sharing

About

Simple Double Memo

This app allows you to write and manage two memos simultaneously on a single screen, either stacked vertically or side-by-side horizontally. It automatically adjusts the layout based on your device's orientation, making it ideal for comparisons or managing multiple ideas.

Highlights
  • Two-panel memo structure (vertical & horizontal)
  • Automatic layout switching with screen rotation
  • Save memos with titles and update dates
  • Edit, delete, and reorder memos
  • Search function for titles and content
  • No ads or in-app purchases
Features
Read full description

"This app is a simple and easy-to-use new style memo app, allowing you to write two memos side by side either vertically or horizontally. Use it as an idea notebook, comparison notes, or manage two themes — how you use it is up to you. In portrait mode, the layout switches automatically to two stacked memos, and in landscape, two memos side by side. Just tilt your iPhone or iPad and both memos will be displayed naturally and clearly. Experience the convenience of handling two memos in parallel on one screen! [Main features] * Two-panel memo structure (vertical & horizontal) Shows Memo 1 and Memo 2 stacked vertically in portrait and side-by-side in landscape, switching automatically with screen rotation. * Save memos with titles Each memo saves a title and texts for top (left) and bottom (right) sections, automatically added to list. Update dates are recorded for easy review. * Edit, delete, reorder Tap to edit any memo, swipe to delete, drag & drop to reorder. Also use the Edit button at top-left for reordering and deletion. * Search function Search keywords in titles and memo contents to quickly find what you need. * No ads & one-time purchase This is a paid, no ads app with no in-app purchases or subscriptions for distraction-free memo-taking. [How to use] 1. Add a memo Tap the "+" button at screen bottom right, input title and contents, then save with "Done". 2. Edit, delete, reorder memos Tap a saved memo to edit and update, swipe to delete, drag & drop to reorder, or use "Edit" button. 3. Search memos Type keywords in the search bar at the top to instantly list relevant memos. Ideal as an idea notebook, comparison notes, or to organize content from two perspectives. Make the most of the two-panel layout with your own style. *Note: This is a paid app with no ads."

Screenshots

PDF Scanner Converter Document4 screens
Simple Double Memo4 screens

Verdict

The call

The clearest difference is review sentiment: Simple Double Memo at 100% against PDF Scanner Converter Document's 26%. Simple Double Memo also leads on in-app purchases (none vs 14) and ads (none vs shown). PDF Scanner Converter Document's advantage is price (Free vs $2.99) and update cadence (every 11 days vs every 4 months). On 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 Scanner Converter Document is free to download; Simple Double Memo costs $2.99 up front. PDF Scanner Converter Document sells 13 in-app purchases, starting at $3.99 per 7 days. Simple Double Memo asks for nothing beyond the download.

UpkeepUpdate frequency

PDF Scanner Converter Document ships an update every 11 days, Simple Double Memo every 4 months. The most recent releases landed on October 16, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 4 level
PDF Scanner Converter Document versus Simple Double Memo: the parameters behind the verdict, then further details
ParameterPDF Scanner Converter DocumentSimple Double Memo
PriceFree — better$2.99
Rating4.5 (77 ratings) — better—
Positive reviews26.5% of reviews100.0% of reviews — better
Number of ratings77 — better—
Update frequencyEvery 11 days — betterEvery 4 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better17.6
Further details — not scored
Size103 MB3 MB
Age rating9+4+
DeveloperTERALIX LTDShun Isayama

Customer experience

PDF Scanner Converter Document

All ratings77 ratings
Positive87.0%
Neutral3.9%
Negative9.1%
Written reviews34 reviews
Positive26.5%
Neutral2.9%
Negative70.6%

Simple Double Memo

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

In-app purchases

13 purchases

PDF Scanner Converter Document

Subscriptions12
  • Subscribe weekly3 Days trial$3.997 Days
  • Subscribe monthly3 Days trial$4.991 Month
  • Subscribe monthly3 Days trial$6.991 Month
Show 9 more
  • Premium version3 Days trial$6.997 Days
  • Subscribe Monthly$6.991 Month
  • Subscribe monthly3 Days trial$7.991 Month
  • Premium Access3 Days trial$7.997 Days
  • PDF Year Subscription3 Days trial$29.991 Year
  • PDF Year Subscription$39.991 Year
  • Subscribe annually3 Days trial$39.991 Year
  • Best solution for everyone3 Days trial2 variants$39.991 Year
  • Best solution for everyone$39.991 Year
One-time1
  • PDF Scanner - Premium FOREVER$49.99
None

Simple Double Memo

No in-app purchases

Questions

Is PDF Scanner Converter Document free?
PDF Scanner Converter Document is free to download, with in-app purchases available.
Is Simple Double Memo free?
Simple Double Memo costs $2.99, with no in-app purchases.
Do PDF Scanner Converter Document or Simple Double Memo have ads?
PDF Scanner Converter Document shows ads; Simple Double Memo does not.
Which is updated more often, PDF Scanner Converter Document or Simple Double Memo?
PDF Scanner Converter Document ships an update every 11 days, and Simple Double Memo every 4 months. Most recently, PDF Scanner Converter Document was updated on October 16, 2026 and Simple Double Memo on October 15, 2026.

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