# Lock Notes vs zInventory

The clearest difference is in-app purchases: zInventory at none against Lock Notes's 7. zInventory also leads on iOS requirement (11.0 vs 15.0). Lock Notes's advantage is update cadence (every 10 days vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. Lock Notes sells 7 in-app purchases, starting at $4.99 per 7 days. zInventory asks for nothing beyond the download.

Lock Notes ships an update every 10 days, zInventory every 7 months. The most recent releases landed on October 21, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Lock Notes | zInventory |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (138 ratings)](https://appshunter.io/ios/app/lock-notes-private-journal/id1211884686/reviews)** | — |
| Number of ratings | **138** | — |
| Positive reviews | 54.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 7 months |
| Monetization | Subscription | — |
| Size | 23 MB | 16 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LYKOV STUDIO LTD](https://appshunter.io/developer/1783754094) | [zLink](https://appshunter.io/developer/1391110737) |

## What reviewers say

### Lock Notes

[App page](https://appshunter.io/ios/app/lock-notes-private-journal/id1211884686)

Securely store private thoughts, passwords, and reminders with biometric authentication. Enjoy a simple, elegant interface with iCloud sync, customizable themes, and backup options. Your data remains private and encrypted.

**Highlights:** Biometric authentication (Face ID, Touch ID), Encrypted note storage, iCloud sync across devices, Customizable themes and dark mode, Backup and restore functionality, Ad-free minimalist interface

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Weekly | $4.99 | per 7 days |
| Monthly | $7.99 | per month |
| Annual | $29.99 | per year |
| Annual | $29.99 | per year |
| Disable ads | $0.99 | one-time |
| Lifetime | $39.99 | one-time |


### zInventory

[App page](https://appshunter.io/ios/app/zinventory/id1504685834)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lock Notes free?

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

### Is zInventory free?

zInventory is free to download, with no in-app purchases.

### Do Lock Notes or zInventory have ads?

Neither Lock Notes nor zInventory shows ads.

### Which is updated more often, Lock Notes or zInventory?

Lock Notes ships an update every 10 days, and zInventory every 7 months. Most recently, Lock Notes was updated on October 21, 2026 and zInventory on October 19, 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.*