Comparison

S3Crypt vs QRScanMaster · QR Scanner&OCR

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

Head to head
About

S3Crypt

This app generates secure, unique passwords based on a master key and a unique key for each site. You only need to remember these two pieces of information to create and access your passwords, without needing a separate password manager.

Highlights
  • Generates secure, unique passwords
  • Uses a master key and unique key
  • No password storage
  • Passwords recreated with same keys
  • Case-sensitive key input
  • Copy password to clipboard
Features
Read full description

With S3Crypt you do not need to remember all your different and complex passwords, but instead you only need to remember two pieces of information. With those two pieces of information S3Crypt creates very secure and unique passwords. Use with or without a password manager. By using this app your secure passwords will be readily accessible even if your password manager is not available. The two pieces of information you need are very easy to remember: Master Key: Choose anything you want as long as it is known only to you, and remember your Master Key is always the same for every website! Unique Key: Choose any format that can be repeated for all your websites, and remember your Unique Key changes for each website! Examples: For Amazon: Master Key: ExampleMaster Unique Key: amazon For Costco: Master Key: ExampleMaster Unique Key: costco Notice in the examples that the Master Key was the same for both, but the Unique Key changed based on the website being used. Now that you have created a Master Key and a Unique Key format you are ready to use S3Crypt to create extremely secure passwords for each website.  To begin, type in your Master Key and Unique Key, then click Generate button. Next, copy the generated password to the clipboard by clicking the Copy button and then paste it in the password box on whatever website it was generated for. There is no need to memorize several passwords. You only need to remember your Master Key and your Unique Key format. The same website password can be recreated with the same Master Key and Unique Key pair. Key things to remember: 1) S3Crypt does not store or save any passwords. 2) You are the password manager. Only you can create your passwords. 3) Your Master Key never changes. 4) Your Unique Key "format" never changes. 5) Generated passwords are a derived from "both" the Master Key and Unique Key combination. Any difference results in a completely different password. 6) A generated password can never be used to determine the keys used to create it. 7) Both Master Key and Unique Key are case sensitive, in other words uppercase letters are different than lowercase letters and result in different passwords. Enjoy!

About

QRScanMaster · QR Scanner&OCR

Features
Read full description

This product is an application for scanning and recording QR codes and barcodes, which can help you quickly and accurately parse QR code information and provide intelligent operation processes. We have implemented the functions of one click scanning, recording, querying, and exporting xlsx for you, allowing you to easily track historical records and facilitate subsequent data processing and analysis. Scanning function Support for single piece scanning Intelligent parsing of QR codes QR code shortcut Scan Record Function Query Function Download xlsx history function (including intelligent classification) Generate QR code Type QR code generation (continuously updated) Generate QR code history Document recognition function 1. Subscription services a. One week pro b. January Pro c. One year Pro 2. Subscription price a. $2.99 per week for Pro (converted according to national exchange rates) b. Monthly pro is 5.99 US dollars per month (converted according to national exchange rates) c. Annual Pro $24.99 USD (converted according to national exchange rates) 3. Payment: After the user confirms the purchase of the well, the payment will be credited to the iunes account 4. Automatic renewal: The Apple TTunes account will be charged within 24 hours before the expiration date. After successful deduction, the subscription cycle will be extended by one subscription cycle 5. Turn off service: You can go to "Settings" on your Apple phone, go to "Tunes Store and App Store", click "Apple ID", select "View Apple ID", go to "Account Settings - Page", click "Subscription", and manage the automatic subscription service. If you need to cancel, you can turn off the service 24 hours before the end of each billing cycle. No more fees will be charged within 24 hours before the expiration date 6. Service Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ 7. Privacy Agreement: https://qrcode-c9431.web.app

Screenshots

S3Crypt4 screens
QRScanMaster · QR Scanner&OCR4 screens

Verdict

The call

The clearest difference is price: QRScanMaster · QR Scanner&OCR at Free against S3Crypt's $0.99. QRScanMaster · QR Scanner&OCR also leads on update cadence (every 2 weeks vs every 8 months). S3Crypt's advantage is in-app purchases (none vs 3) and ads (none vs shown). 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

QRScanMaster · QR Scanner&OCR is free to download; S3Crypt costs $0.99 up front. QRScanMaster · QR Scanner&OCR sells 3 in-app purchases, starting at $6.99 per 7 days. S3Crypt asks for nothing beyond the download.

UpkeepUpdate frequency

S3Crypt ships an update every 8 months, QRScanMaster · QR Scanner&OCR every 2 weeks. The most recent releases landed on June 10, 2026 and October 10, 2026 respectively.

Scorecard4 real differences · 6 level
S3Crypt versus QRScanMaster · QR Scanner&OCR: the parameters behind the verdict, then further details
ParameterS3CryptQRScanMaster · QR Scanner&OCR
Price$0.99Free — better
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 8 monthsEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.215 — better
Further details — not scored
Size2 MB44 MB
Age rating4+17+
DeveloperBrian McAlister菊琴 丁

In-app purchases

None

S3Crypt

No in-app purchases

3 purchases

QRScanMaster · QR Scanner&OCR

Subscriptions3
  • one weak pro$6.997 Days
  • one month pro(three day trial)3 Days trial$14.991 Month
  • one year pro(seven day tria)7 Days trial$34.991 Year

Questions

Is S3Crypt free?
S3Crypt costs $0.99, with no in-app purchases.
Is QRScanMaster · QR Scanner&OCR free?
QRScanMaster · QR Scanner&OCR is free to download, with in-app purchases available.
Do S3Crypt or QRScanMaster · QR Scanner&OCR have ads?
QRScanMaster · QR Scanner&OCR shows ads; S3Crypt does not.
Which is updated more often, S3Crypt or QRScanMaster · QR Scanner&OCR?
S3Crypt ships an update every 8 months, and QRScanMaster · QR Scanner&OCR every 2 weeks. Most recently, S3Crypt was updated on June 10, 2026 and QRScanMaster · QR Scanner&OCR on October 10, 2026.

Other comparisons