# Smart Noise Detector vs LockBoard

The clearest difference is price: LockBoard at Free against Smart Noise Detector's $0.99. LockBoard also leads on update cadence (weekly vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

LockBoard is free to download; Smart Noise Detector costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Smart Noise Detector ships an update every 3 months, LockBoard weekly. The most recent releases landed on October 5, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Smart Noise Detector | LockBoard |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 1 MB | 22 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YongShin Kwak](https://appshunter.io/developer/1846240980) | [Tatsuya Hirano](https://appshunter.io/developer/1571057475) |

## What reviewers say

### Smart Noise Detector

[App page](https://appshunter.io/ios/app/smart-noise-detector/id6761699505)

**Features:** macOS Compatibility

**In-app purchases:** none


### LockBoard

[App page](https://appshunter.io/ios/app/lockboard-lock-screen-notes/id6794582104)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart Noise Detector free?

Smart Noise Detector costs $0.99, with no in-app purchases.

### Is LockBoard free?

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

### Do Smart Noise Detector or LockBoard have ads?

Neither Smart Noise Detector nor LockBoard shows ads.

### Which is updated more often, Smart Noise Detector or LockBoard?

Smart Noise Detector ships an update every 3 months, and LockBoard weekly. Most recently, Smart Noise Detector was updated on October 5, 2026 and LockBoard on October 18, 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.*