Lock Notes vs CalcPlus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- Encrypted local notes storage
- Calculator interface
- PIN and biometric security
- Offline functionality
- Customizable themes and app icons
- Auto-wipe on failed attempts
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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
Verdict
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
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.
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.
Lock Notes ships an update every 10 days, CalcPlus fortnightly. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.
| Parameter | Lock Notes | CalcPlus |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (1.1K ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 73.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 1.1K — better | 2 |
| Update frequency | Every 10 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 8 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | JulyApps Ltd | Wildcatter LLC |
Customer experience
Lock Notes
CalcPlus
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
Lock Notes
- Auto Backup$14.991 Year
- Unlimited Notes$4.99
- Lock Notes Pro$9.99
CalcPlus
- CalcPlus Pro$9.99








