Comparison

Lock Master vs Scanner

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

Head to head
About

Lock Master

Securely store and manage all your lock combinations in one place. Never forget a code for your bicycle, gym, or storage unit locks again.

Highlights
  • Store lock combinations
  • Manage bicycle lock codes
  • Track gym lock codes
  • Organize storage unit codes
  • Simple interface
Features
Read full description

Lock Master keeps track of your lock combinations. Bicycle locks, gym locks, storage unit locks, all those combinations can get confusing. Store them all here.

About

Scanner

Transform your mobile device into a powerful scanner. Automatically recognize text (OCR) and convert documents into digital PDF or JPEG files. Organize, edit, and share your scans with ease.

Highlights
  • Scan documents to PDF or JPEG
  • Automatic text recognition (OCR)
  • Edit and enhance scans
  • Organize with custom folders
  • Cloud storage integration
  • Electronic signature support
Features
Read full description

Scanner: Scan To PDF is free to download and turns your mobile device into a powerful scanner that recognises text automatically (OCR) and allows you to create, save, and organise your paper documents as a digital file. Scan anything — receipts, notes, ID cards, recipes, photos, business cards, whiteboards — and turn them into PDF or JPEG files you can work with on your smartphone, tablet, or computer. HOW IT WORKS • Scan any document and convert to PDF or photo. • Get perfect scans of book and magazine pages with Straighten in Book Mode. • Quickly scan and save your important documents to Dropbox or Google Drive so you can access and share them wherever you are. • Adjust the brightness and contrast of your scans in just a few taps. DOCUMENT SCANNER • This tiny yet powerful free scanner app is a must-have for students and anyone involved in a small business: accountants, realtors, managers, or lawyers. Scan anything you need, including receipts, contracts, paper notes, fax papers, books, and store your scans as multipage PDF or JPG files. CAPTURE • Scan anything with precision with this mobile PDF scanner. • Advanced image technology automatically detects borders, sharpens scanned content, and recognises text (OCR). ENHANCE • NEW: Edit in Scan feature allows you to edit your scans. • Preview, reorder, crop, rotate, resize, and adjust color in PDF or photo scans. • Remove and edit imperfections, erase stains, marks, creases, even handwriting. INNOVATIVE PDF SCANNER • Scan documents and photos to PDF, JPG, or TXT • Easily scan multiple pages into one document • Recognize text from any scannable object with OCR • Put your electronic signature on documents HANDY DOCUMENT EDITOR \ FILE MANAGER • Edit scans using color correction and noise removing features • Use file manager with folders, drag \ drop, and document editing features • Protect your confidential scans by locking folders and files with PIN ORGANISE • Capture forms, receipts, notes, ID cards, health documents, and business cards and organise into custom folders so they are easy to access and find. • Contact information will be automatically extracted so you can quickly add to your device contacts — no typing needed. You can even highlight expenses on tax receipts with ease. QUICKLY FIND DOCUMENTS IN PHOTO LIBRARY • This powerful scanner app automatically finds documents and receipts in your photos and turns them into PDF scans, so you don't have to. • Touch up scans or photos from your camera roll. REUSE • Turn your scan into a high-quality Adobe PDF that unlocks text for reuse through automated text recognition (OCR). • Automatic OCR turns text into content you can edit, resize, and reuse in other documents. SCAN ANYTHING, ANYWHERE, ANYTIME • The PDF Scanner app even lets you scan multi-page documents and save with a single tap. • Even lengthy legal documents become manageable and scannable with the PDF Scanner app, which lets you search, select, and copy text. DO MORE WITH ACROBAT • You can also open a PDF scan in Acrobat Reader to highlight key sections, add comments, fill and sign documents. • Free, built-in optical character recognition (OCR) lets you reuse scanned text and content to work with in Adobe Acrobat Reader. IN-APP PURCHASE • Subscribe for even more scanning power. Subscriptions work across Scan and Reader mobile apps and Acrobat on the web. • Combine scans into one file so you can take multiple scans and consolidate into one document. • Export PDFs to Microsoft Word, Excel, or PowerPoint file formats to repurpose or reformat your documents. • Increase OCR capacity from 25 to 100 pages so that you can find text in multiple scans. Download the free mobile scanner to convert important photos and documents into PDF and JPEG files to help you stay organised. PDF Scanner is the PDF converter trusted by millions worldwide.

Screenshots

Lock Master4 screens
Scanner4 screens

Verdict

The call

The clearest difference is price: Scanner at Free against Lock Master's $0.99. Scanner also leads on rating (5.0 vs 3.8) and update cadence (fortnightly vs every 27 months). Lock Master's advantage is ads (none vs shown) and ratings volume (6 vs 1). On in-app purchases and device support 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

Scanner is free to download; Lock Master costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Scanner holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Lock Master has 6 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Lock Master ships an update every 27 months, Scanner fortnightly. The most recent releases landed on August 31, 2026 and September 23, 2026 respectively.

Scorecard7 real differences · 3 level
Lock Master versus Scanner: the parameters behind the verdict, then further details
ParameterLock MasterScanner
Price$0.99Free — better
Rating3.8 (6 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings6 — better1
Update frequencyEvery 27 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPhone, Apple WatchiPhone, iPad, iPod — better
Requires iOS18.513.0 — better
Further details — not scored
Size17 MB12 MB
Age rating4+4+
DeveloperPatrick Q. KellyKrushit Sachapara

Customer experience

Lock Master

All ratings6 ratings
Positive66.7%
Neutral16.7%
Negative16.7%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Scanner

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Lock Master

No in-app purchases

None

Scanner

No in-app purchases

Questions

Is Lock Master free?
Lock Master costs $0.99, with no in-app purchases.
Is Scanner free?
Scanner is free to download, with no in-app purchases.
Which has better reviews, Lock Master or Scanner?
Scanner is rated higher. Lock Master averages 3.8 out of 5 from 6 ratings, while Scanner averages 5.0 from 1 ratings.
Do Lock Master or Scanner have ads?
Scanner shows ads; Lock Master does not.
Which is updated more often, Lock Master or Scanner?
Lock Master ships an update every 27 months, and Scanner fortnightly. Most recently, Lock Master was updated on August 31, 2026 and Scanner on September 23, 2026.

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