Comparison

Lock Notes vs CalcPlus

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

CalcPlus

This app combines a fully functional calculator with a secure, encrypted notes system. Store sensitive information like crypto wallet phrases and passwords locally and offline, protected by a PIN and optional biometric authentication. It offers a discreet interface and prioritizes user privacy with no cloud sync or ads.

Highlights
  • Encrypted local notes storage
  • Calculator interface
  • PIN and biometric security
  • Offline functionality
  • Customizable themes and app icons
  • Auto-wipe on failed attempts
Features
Read full description

CalcPlus is a fully functional calculator with a hidden encrypted notes system built in. Enter your 6-digit PIN, tap =, and unlock secure, local-only notes storage completely offline. Use CalcPlus to store: • Crypto wallet recovery phrases (Ledger, MetaMask, etc.) • API keys and infrastructure passwords • Home Wi-Fi or VPN credentials • Door codes, admin access, or tax IDs • Any sensitive info that shouldn’t be in iCloud, Google Docs, or your camera roll Everything is encrypted on-device. No cloud sync. No account. No trace. CalcPlus Pro features: • Set your own custom PIN • Enable Face ID / Touch ID 2FA • Wipe notes after failed PIN attempts • Choose between Blue, Red, or Teal themes and auto-switch app icons to match CalcPlus is designed for privacy-focused users, security professionals, and anyone who wants peace of mind without compromise. Why CalcPlus? • Encrypted and offline • Stealthy interface looks like a basic calculator • No signup. No servers. No ads. • Instant, secure access — even when your signal is dead Download CalcPlus and reclaim your privacy.

Screenshots

Lock Notes4 screens
CalcPlus4 screens

Verdict

The call

The clearest difference is monetization model: CalcPlus at free with in-app purchases against Lock Notes's subscription. CalcPlus also leads on rating (5.0 vs 4.5) and review sentiment (100% vs 73%). Lock Notes's advantage is ratings volume (1.1K vs 2) and iOS requirement (13.0 vs 15.0). On price, update cadence, 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 Notes sells 3 in-app purchases, starting at $14.99 per year and CalcPlus 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

CalcPlus holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Lock Notes has 1.1K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 73% of Lock Notes's written reviews are positive against 100% of CalcPlus's.

UpkeepUpdate frequency

Lock Notes ships an update every 10 days, CalcPlus fortnightly. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.

Scorecard5 real differences · 5 level
Lock Notes versus CalcPlus: the parameters behind the verdict, then further details
ParameterLock NotesCalcPlus
PriceFreeFree
Rating4.5 (1.1K ratings)5.0 (2 ratings) — better
Positive reviews73.3% of reviews100.0% of reviews — better
Number of ratings1.1K — better2
Update frequencyEvery 10 days — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size8 MB1 MB
Age rating4+4+
DeveloperJulyApps LtdWildcatter LLC

Customer experience

Lock Notes

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

CalcPlus

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
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

CalcPlus

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

CalcPlus

One-time1
  • CalcPlus Pro$9.99

Questions

Is Lock Notes free?
Lock Notes is free to download, with in-app purchases available.
Is CalcPlus free?
CalcPlus is free to download, with in-app purchases available.
Which has better reviews, Lock Notes or CalcPlus?
CalcPlus is rated higher. Lock Notes averages 4.5 out of 5 from 1.1K ratings, while CalcPlus averages 5.0 from 2 ratings.
Do Lock Notes or CalcPlus have ads?
Neither Lock Notes nor CalcPlus shows ads.
Which is updated more often, Lock Notes or CalcPlus?
Lock Notes ships an update every 10 days, and CalcPlus fortnightly. Most recently, Lock Notes was updated on October 11, 2026 and CalcPlus on October 2, 2026.

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