# Lockbook vs AppOtter

The clearest difference is iOS requirement: AppOtter at 15.1 against Lockbook's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Lockbook sells 1 in-app purchase, starting at $2.99 per month and AppOtter sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Lockbook | AppOtter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (14 ratings)](https://appshunter.io/ios/app/lockbook-private-notes/id1526775001/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Freemium | — |
| Size | 79 MB | 49 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lockbook LLC](https://appshunter.io/developer/1526775003) | [Matti Sirokov](https://appshunter.io/developer/1850987227) |

## What reviewers say

### Lockbook

[App page](https://appshunter.io/ios/app/lockbook-private-notes/id1526775001)

A secure, open-source note-taking app prioritizing user privacy. It encrypts all your data locally, ensuring only you and authorized users can access your notes. Offers seamless syncing and sharing across devices, with a developer-friendly command-line interface.

**Highlights:** End-to-end encryption, Open-source code, Cross-device syncing, Note sharing, Developer CLI, No personal data collection

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 30GB | $2.99 | per month |


### AppOtter

[App page](https://appshunter.io/ios/app/appotter-app-analytics/id6755641533)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AppOtter Monthly | $4.99 | per month |
| AppOtter Annual | $44.99 | per year |


## Frequently asked questions

### Is Lockbook free?

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

### Is AppOtter free?

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

### Do Lockbook or AppOtter have ads?

Neither Lockbook nor AppOtter shows ads.

### Which is updated more often, Lockbook or AppOtter?

Lockbook ships an update weekly, and AppOtter weekly. Most recently, Lockbook was updated on October 24, 2026 and AppOtter on October 25, 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.*