# NuTone Knock vs Flexra App

The clearest difference is update cadence: Flexra App at every 8 days against NuTone Knock's every 2 months. NuTone Knock's advantage is iOS requirement (10.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

NuTone Knock ships an update every 2 months, Flexra App every 8 days. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | NuTone Knock | Flexra App |
| --- | --- | --- |
| 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 | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | Free | — |
| Size | 36 MB | 17 MB |
| Requires iOS | **10.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Broan-NuTone, LLC.](https://appshunter.io/developer/1060691176) | [SYNEXALABS PTY LTD](https://appshunter.io/developer/1879774550) |

## 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


### Flexra App

[App page](https://appshunter.io/ios/app/flexra-app/id6791799785)

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

**In-app purchases:** none


## Frequently asked questions

### Is NuTone Knock free?

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

### Is Flexra App free?

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

### Do NuTone Knock or Flexra App have ads?

Neither NuTone Knock nor Flexra App shows ads.

### Which is updated more often, NuTone Knock or Flexra App?

NuTone Knock ships an update every 2 months, and Flexra App every 8 days. Most recently, NuTone Knock was updated on October 21, 2026 and Flexra App on October 13, 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.*