Comparison

LOCK MEMO vs SIS Password Manager

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

Head to head
About

LOCK MEMO

This app offers a straightforward way to create and manage private notes with robust passcode protection. It's designed for intuitive use, requiring no complex setup to keep your personal information, ideas, and daily entries secure and organized.

Highlights
  • Passcode protection
  • Create and edit notes
  • Folder management
  • Search notes
  • iCloud backup
  • Adjustable font size
Read full description

LOCK MEMO is a simple and secure note app with password protection. Designed with simplicity in mind, anyone can use it intuitively without complicated steps. No complex setup is required. Start using it today. ※ Password protection must be enabled in settings. ** Features ** • Create and edit notes • Passcode protection • Adjust font size • Character and line counter • Search notes • Folder management • iCloud backup • URL scheme (pwmm:) Perfect for storing private information, ideas, daily notes, and personal content securely. Keep your notes safe and organized with LOCK MEMO. ■ Terms of Use https://eeggs.jp/terms-of-use-en

About

SIS Password Manager

Securely manage all your passwords and sensitive data with military-grade encryption. Easily log in using biometrics and back up your information to the cloud for effortless restoration across devices. Offers extensive customization with over 12,000 icons.

Highlights
  • Military-grade AES 256-bit encryption
  • Biometric login (Touch ID/Face ID)
  • Cloud backup and restore
  • Automatic password generator
  • Up to 3 IDs/passwords/images per record
  • Over 12,000 icon options
  • Dark mode support
Features
Read full description

◆Recommended for users new to password management. - Are you worried about managing your passwords with a simple memo app? Securely manage your data with military-grade encryption technology. - Easily log in using Touch ID or Face ID. - Supports the latest technologies such as cloud backup. - Effortlessly restore your data when changing devices or in case of device failure (backup required). - We have received many positive messages from first-time smartphone users and senior users. If you have any questions, please feel free to contact our support email! --------------------------------------------- ◆Already using another password management app? Please compare it with your current app and see the difference! - Have you ever lost your data when changing devices? - Want to reorder your saved items? - Can only save one password per record? - Want to save images of QR codes or random number tables? - Asked a question but never received a reply? - Want to search because the number of records has increased? - Not enough icon options you like? ◆Leave it to SIS Password Manager While naturally solving all of the above, the biggest reason we developed this app was because we witnessed: "No response at all to reviews or requests" "Complete data loss when changing devices" "Backups that turn out incomplete" Taking this situation seriously, we continue to provide regular updates and dedicated support. Thanks to this policy, many users have switched from other apps and kindly shared their satisfaction. (If we are forced to discontinue the service, we promise to announce it sincerely and will never abandon users without notice.) --------------------------------------------- ◆Features - Military-grade AES 256-bit encryption - Organize records by categories - Reorder items freely - Search function - Automatic password generator - Up to 3 IDs, passwords, and images/photos per record - Over 12,000 icons to choose from - Backup support (cloud services expanding progressively) - Dark mode support - Auto logout with timeout settings --------------------------------------------- ◆About Subscriptions This app offers a subscription menu to automatically back up your data whenever you edit or delete entries. Free trial - 7 days - After the trial, the following fees apply Pricing - Auto Backup: 2.99USD/month (renewed monthly) - Auto Backup with Donation: ¥7.99USD/month (renewed monthly) Restoring subscriptions on a new device - Use the "Restore Purchase" button on the purchase screen. - Please log in to your new device with the same Apple ID used for the original purchase. Check or cancel your subscription - Go to Settings app → Account → Subscriptions to confirm the next renewal date or to enable/disable auto-renewal. About automatic renewal - Unless you cancel auto-renewal more than 24 hours before the end of the subscription period, it will be automatically renewed. - Charges for the next period will be made within 24 hours before the current period ends. Important notes - Cancellations must be made via the official Apple-provided methods as described above. - We do not accept cancellations for the current month. - Charges will be made via your Apple ID account. Licensed Application EULA https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ --------------------------------------------- ◆Disclaimer - Although this app is developed with the utmost care, we are not liable for any damages resulting from its use. - Please be sure to regularly back up your data to prevent loss due to unexpected device failures. ◆About Trademarks - Product names, system names, software names, application names, company names, and organization names listed in the icons are trademarks of their respective companies and organizations. - To improve icon readability, trademark and copyright symbols may be omitted or simplified. ◆Privacy Policy https://sisyoukum.blogspot.com/2017/02/sis.html

Screenshots

LOCK MEMO2 screens
SIS Password Manager4 screens

Verdict

The call

The clearest difference is ratings volume: LOCK MEMO at 494 against SIS Password Manager's 1. SIS Password Manager's advantage is rating (5.0 vs 4.7) and update cadence (every 9 days vs monthly). On price, review sentiment, ads and in-app purchases 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

Both are free to download. LOCK MEMO sells 1 in-app purchase, starting at $0.99 per month and SIS Password Manager sells 4 in-app purchases, starting at $1.49 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

SIS Password Manager holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: LOCK MEMO has 494 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 74% of LOCK MEMO's written reviews are positive against 76% of SIS Password Manager's.

UpkeepUpdate frequency

LOCK MEMO ships an update monthly, SIS Password Manager every 9 days. The most recent releases landed on September 22, 2026 and August 21, 2026 respectively.

Scorecard4 real differences · 6 level
LOCK MEMO versus SIS Password Manager: the parameters behind the verdict, then further details
ParameterLOCK MEMOSIS Password Manager
PriceFreeFree
Rating4.7 (494 ratings)5.0 (1 ratings) — better
Positive reviews74.5% of reviews76.0% of reviews — better
Number of ratings494 — better1
Update frequencyMonthlyEvery 9 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size31 MB140 MB
Age rating4+4+
DeveloperEasterEggsSISYOU.KUM

Customer experience

LOCK MEMO

All ratings494 ratings
Positive94.7%
Neutral3.0%
Negative2.2%
Written reviews94 reviews
Positive74.5%
Neutral7.4%
Negative18.1%

SIS Password Manager

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews50 reviews
Positive76.0%
Neutral12.0%
Negative12.0%

Bugs and requests

LOCK MEMO

Reported bugs

6 issues
  • Notes disappearing from folders
  • Edit function becomes unavailable
  • App incompatible with newer iOS versions
  • Touch ID not functioning despite advertised
  • Password recovery issues
Show 1 more
  • App crashes or freezes

Requested features

9 requests
  • Alphabetical sorting of notes
  • Search functionality
  • Touch ID/biometric authentication
  • Text formatting options (bold, underline, italics)
  • Ability to share or export notes
Show 4 more
  • Picture upload capability
  • Increased storage space
  • Option to purchase ad-free version
  • Dark mode option

SIS Password Manager

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

LOCK MEMO

Subscriptions1
  • Premium Plan$0.991 Month
4 purchases

SIS Password Manager

Subscriptions2
  • Automatic backup7 Days trial$1.491 Month
  • Auto-backup and cheer7 Days trial$9.491 Month
One-time2
  • No advertisement mode$2.99
  • No ads. mode with cheer$7.99

Questions

Is LOCK MEMO free?
LOCK MEMO is free to download, with in-app purchases available.
Is SIS Password Manager free?
SIS Password Manager is free to download, with in-app purchases available.
Which has better reviews, LOCK MEMO or SIS Password Manager?
SIS Password Manager is rated higher. LOCK MEMO averages 4.7 out of 5 from 494 ratings, while SIS Password Manager averages 5.0 from 1 ratings.
Do LOCK MEMO or SIS Password Manager have ads?
Both LOCK MEMO and SIS Password Manager show ads.
Which is updated more often, LOCK MEMO or SIS Password Manager?
LOCK MEMO ships an update monthly, and SIS Password Manager every 9 days. Most recently, LOCK MEMO was updated on September 22, 2026 and SIS Password Manager on August 21, 2026.

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