Comparison

Lock Notes vs Calculator+ Secure Vault

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

Calculator+ Secure Vault

Securely store and protect your private photos, videos, notes, and credit card information. This encrypted vault offers features like a screenshot blocker and emergency exit for ultimate privacy and peace of mind.

Highlights
  • Photo & Video Vault
  • Notes & Credit Cards Storage
  • Cloud Backup (iCloud/Google Drive)
  • Screenshot Blocker
  • Emergency Exit
  • Dynamic Security Screen
Features
Read full description

Calculator Vault – Hide Photos, Videos & More Calculator Vault is a powerful privacy app that looks and works like a normal calculator, but behind a secret passcode lies your private vault. Protect your personal files, sensitive information, and private memories in a secure, encrypted space that only you can access. Disguised as a Calculator A fully functional calculator on the outside. Your private vault on the inside. Enter your secret passcode to unlock hidden content. Hide Photos & Videos Store private photos and videos safely away from your gallery. Your files remain protected and accessible only to you. Secure Important Information Keep your personal data organized and protected: • Photos • Videos • Audio Files • Documents • Notes • Passwords • Contacts • Credit Card Information • To-Do Lists Decoy Vault Create a second vault with a different passcode. If someone asks to open the app, show a harmless vault while your real data remains hidden. Panic Switch Instantly exit your vault when needed. Trigger emergency actions by: • Covering the screen • Shaking the device • Placing the phone face down Choose what happens next: • Open Calculator Mode • Return to Home Screen • Open Safari • Open Maps • Open Music Secret Camera Capture photos and videos directly from the calculator interface using custom gestures. • No flash • No shutter sound • Fast and discreet access Secure Cloud Backup Protect your data with encrypted backups. • Google Drive support • iCloud Drive support • Automatic backup options • Sync across your devices Advanced Security • Passcode Protection • Face ID / Touch ID Support • Encrypted Storage • Decoy Vault Protection • Panic Exit System Wireless File Transfer Transfer files between your devices quickly and securely without complicated setup. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Lock Notes4 screens
Calculator+ Secure Vault4 screens

Verdict

The call

The clearest difference is monetization model: Calculator+ Secure Vault at free with in-app purchases against Lock Notes's subscription. Lock Notes's advantage is ads (none vs shown) and review sentiment (73% vs 50%). 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 Calculator+ Secure Vault sells 4 in-app purchases, starting at $5.99 per 3 months. 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 Calculator+ Secure Vault. That said, the two scores are not equally well evidenced: Lock Notes has 1.1K ratings behind it against 105, 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 50% of Calculator+ Secure Vault's.

UpkeepUpdate frequency

Lock Notes ships an update every 10 days, Calculator+ Secure Vault fortnightly. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 5 level
Lock Notes versus Calculator+ Secure Vault: the parameters behind the verdict, then further details
ParameterLock NotesCalculator+ Secure Vault
PriceFreeFree
Rating4.5 (1.1K ratings)4.5 (105 ratings)
Positive reviews73.3% of reviews — better50.0% of reviews
Number of ratings1.1K — better105
Update frequencyEvery 10 days — betterFortnightly
AdsNo — betterYes
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.0
Further details — not scored
Size8 MB72 MB
Age rating4+17+
DeveloperJulyApps LtdAhmet Selman Durak

Customer experience

Lock Notes

All ratings1,149 ratings
Positive89.6%
Neutral1.4%
Negative9.0%
Written reviews834 reviews
Positive73.3%
Neutral6.1%
Negative20.6%

Calculator+ Secure Vault

All ratings105 ratings
Positive86.7%
Neutral5.7%
Negative7.6%
Written reviews4 reviews
Positive50.0%
Neutral50.0%
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

Calculator+ Secure Vault

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
4 purchases

Calculator+ Secure Vault

Subscriptions3
  • Calculator + 3 Monthly Premium3 Days trial$5.993 Months
  • Calculator+ 6 Monthly Premium3 Days trial$9.996 Months
  • Calculator+ Annual Premium3 Days trial$17.991 Year
One-time1
  • Calculator+ Lifetime Premium$39.99

Questions

Is Lock Notes free?
Lock Notes is free to download, with in-app purchases available.
Is Calculator+ Secure Vault free?
Calculator+ Secure Vault is free to download, with in-app purchases available.
Which has better reviews, Lock Notes or Calculator+ Secure Vault?
Lock Notes and Calculator+ Secure Vault are both rated 4.5 out of 5 on the App Store, from 1.1K and 105 ratings respectively.
Do Lock Notes or Calculator+ Secure Vault have ads?
Calculator+ Secure Vault shows ads; Lock Notes does not.
Which is updated more often, Lock Notes or Calculator+ Secure Vault?
Lock Notes ships an update every 10 days, and Calculator+ Secure Vault fortnightly. Most recently, Lock Notes was updated on October 14, 2026 and Calculator+ Secure Vault on October 12, 2026.

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