# Note Lock ~ Keep your secret vs Calculator Lock

The clearest difference is price: Calculator Lock at Free against Note Lock ~ Keep your secret's $1.99. Calculator Lock also leads on rating (4.6 vs 4.0) and review sentiment (75% vs 53%). Note Lock ~ Keep your secret's advantage is ads (none vs shown). On in-app purchases, monetization model and device support there is nothing between them.

Calculator Lock is free to download; Note Lock ~ Keep your secret costs $1.99 up front. Note Lock ~ Keep your secret sells 10 in-app purchases, starting at $1.99 per month and Calculator Lock sells 7 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Calculator Lock holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Calculator Lock has 6.5K ratings behind it against 153, so its average is the more settled of the two. Written reviews point the same way: 53% of Note Lock ~ Keep your secret's written reviews are positive against 75% of Calculator Lock's.

Note Lock ~ Keep your secret ships an update every 2 months, Calculator Lock every 2 weeks. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Note Lock ~ Keep your secret | Calculator Lock |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.0 (153 ratings)](https://appshunter.io/ios/app/note-lock-keep-your-secret/id469850764/reviews) | **[4.6 (6.5K ratings)](https://appshunter.io/ios/app/calculator-lock-secure-vault/id6446200267/reviews)** |
| Number of ratings | 153 | **6.5K** |
| Positive reviews | 53.0% of reviews | **74.8% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 51 MB | 80 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [i-App Creation Co., Ltd.](https://appshunter.io/developer/360704053) | [ZipoApps](https://appshunter.io/developer/1671444635) |

## What reviewers say

### Note Lock ~ Keep your secret

[App page](https://appshunter.io/ios/app/note-lock-keep-your-secret/id469850764)

Securely store and manage private notes, ideas, and journals with advanced locking mechanisms and privacy features. Organize your thoughts with rich media, customization options, and backup capabilities.

**Highlights:** Folder and pattern lock, Anti-intruder surveillance, Self-destruct data option, Add pictures and stickers, Customizable themes and fonts, Backup and restore data, Calendar and hybrid views

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Note Lock PRO - Monthly | $1.99 | per month |
| Note Lock PRO - Yearly | $9.99 | per year |
| Pro Fonts | $1.99 | one-time |
| Special Fonts | $1.99 | one-time |
| Unique Fonts 1 | $1.99 | one-time |
| Unique Fonts 3 | $1.99 | one-time |
| Cute Fonts | $1.99 | one-time |
| Unique Fonts 2 | $1.99 | one-time |
| Unlock All Fonts | $6.99 | one-time |
| Unlock All In-app | $29.99 | one-time |

**What reviewers like**

- 🔒 Secure storage of private information
- 👍 Easy to use and intuitive interface
- 🚀 Quick access to notes
- 💡 Innovative decoy mode to deter snooping

**What reviewers complain about**

- 🐛 Frequent crashes and freezing issues
- 🔋 Concerns about data loss and lack of backup options
- 👎 Subscription model and loss of functionality in free version
- 🤯 Incompatibility with latest iOS versions

**Reported bugs**

- App crashes when opening notes
- Unable to rotate screen in landscape mode
- Password reset and migration issues when switching devices

**Requested features**

- Search function to easily find notes
- Ability to organize notes into folders
- Syncing and backup options (e.g., iCloud)
- Customization options for fonts, themes, and layouts


### Calculator Lock

[App page](https://appshunter.io/ios/app/calculator-lock-secure-vault/id6446200267)

Securely hide your private photos, videos, contacts, and passwords behind a disguised calculator interface. Protect your sensitive files with a secret vault and access them only through the app's unique interface. Features include intruder selfies and cloud backups.

**Highlights:** Photo hiding, Video hiding, Contact hiding, Password manager, Disguise mode, Intruder selfie, Cloud backup

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calculator Lock Pro Weekly | $1.99 | per 7 days |
| Hide Photos & Videos | $4.99 | per month |
| Calculator Lock Pro Yearly | $14.99 | per year |
| Remove Ads | $3.99 | one-time |
| Calculator Lock (Remove Ads) | $3.99 | one-time |
| Calculator Lock Pro (Discount) | $14.99 | one-time |
| Calculator Lock Pro (Lifetime) | $29.99 | one-time |

**What reviewers like**

- 🔒 Hidden app
- 👍 Good features
- 👍 Simple and easy to use
- 🔒 Secure vault for photos, videos, and passwords

**What reviewers complain about**

- 🐛 Buggy (doesn't save downloaded videos, can't paste in notes)
- 🔍 App name not very discreet
- 💸 Too much advertising

**Reported bugs**

- Doesn't save downloaded videos to gallery
- Can't paste information in notes
- Intruder selfie feature not working
- App icon change not working

**Requested features**

- Ability to change app name
- Sync between devices
- Ability to paste information in notes


## Frequently asked questions

### Is Note Lock ~ Keep your secret free?

Note Lock ~ Keep your secret costs $1.99, and also offers in-app purchases.

### Is Calculator Lock free?

Calculator Lock is free to download, with in-app purchases available.

### Which has better reviews, Note Lock ~ Keep your secret or Calculator Lock?

Calculator Lock is rated higher. Note Lock ~ Keep your secret averages 4.0 out of 5 from 153 ratings, while Calculator Lock averages 4.6 from 6.5K ratings.

### Do Note Lock ~ Keep your secret or Calculator Lock have ads?

Calculator Lock shows ads; Note Lock ~ Keep your secret does not.

### Which is updated more often, Note Lock ~ Keep your secret or Calculator Lock?

Note Lock ~ Keep your secret ships an update every 2 months, and Calculator Lock every 2 weeks. Most recently, Note Lock ~ Keep your secret was updated on October 24, 2026 and Calculator Lock on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*