# NuTone Knock vs MentalMind Focus with AI

The clearest difference is in-app purchases: NuTone Knock at none against MentalMind Focus with AI's 2. NuTone Knock also leads on iOS requirement (10.0 vs 16.1). MentalMind Focus with AI's advantage is update cadence (every 2 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. MentalMind Focus with AI sells 2 in-app purchases, starting at $2.99 per month. NuTone Knock asks for nothing beyond the download.

NuTone Knock ships an update every 2 months, MentalMind Focus with AI every 2 days. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | NuTone Knock | MentalMind Focus with AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (21 ratings)](https://appshunter.io/ios/app/nutone-knock/id1269475346/reviews)** | — |
| Number of ratings | **21** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 36 MB | 7 MB |
| Requires iOS | **10.0** | 16.1 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Broan-NuTone, LLC.](https://appshunter.io/developer/1060691176) | [Ronald Stel](https://appshunter.io/developer/1809550562) |

## What reviewers say

### NuTone Knock

[App page](https://appshunter.io/ios/app/nutone-knock/id1269475346)

See and speak to visitors from anywhere in crystal clear HD. Features motion detection, night vision, and video recording for reliable home security. Never miss a visitor or delivery again.

**Highlights:** See and speak to visitors remotely, 720p HD video resolution, Integrated motion detection, Night vision, Video recording and snapshots, Two-way audio, 180° camera lens

**Features:** macOS Compatibility

**In-app purchases:** none


### MentalMind Focus with AI

[App page](https://appshunter.io/ios/app/mentalmind-focus-with-ai/id6748761835)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MentalMind Pro Monthly | $2.99 | per month |
| MentalMind Pro Yearly | $22.99 | per year |


## Frequently asked questions

### Is NuTone Knock free?

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

### Is MentalMind Focus with AI free?

MentalMind Focus with AI is free to download, with in-app purchases available.

### Do NuTone Knock or MentalMind Focus with AI have ads?

Neither NuTone Knock nor MentalMind Focus with AI shows ads.

### Which is updated more often, NuTone Knock or MentalMind Focus with AI?

NuTone Knock ships an update every 2 months, and MentalMind Focus with AI every 2 days. Most recently, NuTone Knock was updated on November 3, 2026 and MentalMind Focus with AI on October 28, 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.*