Comparison

Lock Notes vs MemoP

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

Head to head
About

Lock Notes

Securely store and protect your private notes with a passcode or Touch ID. Keep sensitive information like passwords, secrets, and diary entries safe from unauthorized access. Backup and sync notes across devices, customize their appearance, and even add images.

Highlights
  • Passcode and Touch ID protection
  • Security question recovery
  • iCloud backup and sync
  • Customizable font style and size
  • Insert images into notes
  • Print and share notes
Features
Read full description

FINALLY AN APP FOR ALL YOUR PRIVATE NOTES! Keep your most valuable, private, and secret notes away from prying eyes. Keep them all totally secret and safe. Store passwords, secrets, contacts or just keep your diary private. KEY FEATURES: • Use Touch ID or passcode to safely lock access to your private notes. • Set a security question and answer in case you forget your passcode. • Safely Backup your valuable notes to iCloud. • Quickly Sync notes between iPhone & iPad with iCloud. • Sort notes list by name, date or manual. • Select notes font style and size. • Insert images & photos into notes. • Print your notes. • Send notes via text message or email. • Save notes to Camera Roll. • Support for Emoji Emoticons. This app allows you to automatically backup your notes for $9.99 a year through an auto-renewing subscription. Subscriptions will be charged to your credit card through your iTunes account. Your subscription will automatically renew unless cancelled at least 24 hours before the end of the current period You will not be able to cancel a subscription during the active period. You can manage your subscriptions in the Account Settings after purchase. Terms of use: http://www.katans.com/terms-of-use Privacy policy: http://www.katans.com/privacy-policy This app can be freely used up to two notes. A SINGLE PURCHASE COVERS ALL YOUR IPHONE AND IPAD DEVICES.

About

MemoP

Securely store your notes with password protection and biometric authentication. Organize, edit, and share your memos with ease, featuring customizable backgrounds and search capabilities.

Highlights
  • Password lock with Touch ID/Face ID
  • Drag and drop memo organization
  • Swipe to delete notes
  • Direct sharing to messages and social media
  • Customizable backgrounds from photo albums
  • Search and character search functions
  • Adjustable font size and color
Features
Read full description

MemoP is a memo app with ease of operation, utility, password lock function. Compatible with Touch ID / Face ID. ◆ Password Lock function: - Password Lock can be selected. - When Password Lock setting is done, it will be locked when in the background etc, so it is safe. You can also set the Touch ID / Face ID. ◆ Edit function: - You can move memos by dragging and dropping. Deleting notes can also be done with swipe, and operability is simplified. - Because you can lock the edits, if you keep the important memo locked, you can prevent mistakes that you accidentally erase. - Selective deletion, all delete functions are also included ◆ Activity function: - Functions that can post directly to messages, mail, LINE, Twitter etc. ◆ Background selection function: - You can select the background of the main screen. In addition to existing patterns, you can also select and set images from photo albums. ◆ Search refinement function: - It is also possible to narrow down the target memo and display it by entering a search word. ◆ Character search function on the edit screen: - Even if you write a lot of notes, it is easy to find where you wrote it. ◆ Font setting: - Font size can be changed (list screen, memo editing screen) - Select font color on the memo edit screen (select from default, black, and gray) ※ The maximum number of characters that can be entered in one memo is 100,000 (6.0 or later). ※ Deleting an application will delete the saved memo data. ※ If the password is unknown, third parties can not invalidate the lock, so please be careful when managing the setting. ◆ Note: Ads will be hidden if you pay.

Screenshots

Lock Notes4 screens
MemoP4 screens

Verdict

The call

The clearest difference is monetization model: MemoP at free with in-app purchases against Lock Notes's subscription. MemoP also leads on review sentiment (100% vs 73%). Lock Notes's advantage is ads (none vs shown) and ratings volume (1.1K vs 28). On price, rating, update cadence 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 Notes sells 3 in-app purchases, starting at $14.99 per year and MemoP sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for Lock Notes against 4.5 for MemoP. That said, the two scores are not equally well evidenced: Lock Notes has 1.1K ratings behind it against 28, so its average is the more settled of the two. Written reviews are what separate them: 73% of Lock Notes's written reviews are positive against 100% of MemoP's.

UpkeepUpdate frequency

Lock Notes ships an update every 10 days, MemoP every 2 weeks. The most recent releases landed on September 30, 2026 and September 18, 2026 respectively.

Scorecard6 real differences · 4 level
Lock Notes versus MemoP: the parameters behind the verdict, then further details
ParameterLock NotesMemoP
PriceFreeFree
Rating4.5 (1.1K ratings)4.5 (28 ratings)
Positive reviews73.2% of reviews100.0% of reviews — better
Number of ratings1.1K — better28
Update frequencyEvery 10 days — betterEvery 2 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.0
Further details — not scored
Size8 MB34 MB
Age rating4+4+
DeveloperJulyApps LtdMasashi Sasaoka

Customer experience

Lock Notes

All ratings1,149 ratings
Positive89.6%
Neutral1.4%
Negative9.0%
Written reviews832 reviews
Positive73.2%
Neutral6.1%
Negative20.7%

MemoP

All ratings28 ratings
Positive89.3%
Neutral0.0%
Negative10.7%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Lock Notes

Reported bugs

3 issues
  • Notes disappearing after updates
  • Inability to access notes after device reset
  • Sync issues between devices

Requested features

5 requests
  • Advanced formatting options
  • Ability to change passcode
  • Improved search capabilities
  • Folder/organization system
  • Better backup and restore options

MemoP

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Lock Notes

Subscriptions1
  • Auto Backup$14.991 Year
One-time2
  • Unlimited Notes$4.99
  • Lock Notes Pro$9.99
1 purchases

MemoP

One-time1
  • Ad-free$1.99

Questions

Is Lock Notes free?
Lock Notes is free to download, with in-app purchases available.
Is MemoP free?
MemoP is free to download, with in-app purchases available.
Which has better reviews, Lock Notes or MemoP?
Lock Notes and MemoP are both rated 4.5 out of 5 on the App Store, from 1.1K and 28 ratings respectively.
Do Lock Notes or MemoP have ads?
MemoP shows ads; Lock Notes does not.
Which is updated more often, Lock Notes or MemoP?
Lock Notes ships an update every 10 days, and MemoP every 2 weeks. Most recently, Lock Notes was updated on September 30, 2026 and MemoP on September 18, 2026.

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