# AC Clairity vs Crestron Zūm

The clearest difference is ads: Crestron Zūm at none against AC Clairity's shown. Crestron Zūm also leads on review sentiment (50% vs 33%) and monetization model (free vs ad-supported). AC Clairity's advantage is iOS requirement (8.1 vs 14.0). On price, rating, ratings volume and update cadence there is nothing between them.

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

Crestron Zūm holds the better App Store score, 3.6 against 3.4. Both are backed by a comparable volume of ratings — 9 and 8 respectively. Written reviews point the same way: 33% of AC Clairity's written reviews are positive against 50% of Crestron Zūm's.

AC Clairity ships an update every 3 months, Crestron Zūm every 5 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | AC Clairity | Crestron Zūm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (9 ratings)](https://appshunter.io/ios/app/ac-clairity/id1134113100/reviews) | **[3.6 (8 ratings)](https://appshunter.io/ios/app/crestron-zum/id1212507034/reviews)** |
| Number of ratings | **9** | 8 |
| Positive reviews | 33.3% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Ad-supported | **Free** |
| Size | 54 MB | 19 MB |
| Requires iOS | **8.1** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Acuity Brands Lighting, Inc](https://appshunter.io/developer/384447835) | [Crestron Electronics, Inc.](https://appshunter.io/developer/307560804) |

## What reviewers say

### AC Clairity

[App page](https://appshunter.io/ios/app/ac-clairity/id1134113100)

Configure and manage nLight AIR lighting systems wirelessly from your mobile device. This app allows for efficient onsite setup, troubleshooting, and reconfiguration of fixtures, sensors, and wall switches, even offline. It supports multiple simultaneous users for faster project completion.

**Highlights:** Wireless nLight AIR system configuration, Onsite startup and maintenance, Zone and fixture setting adjustments, Offline programming capabilities, Simultaneous multi-user support, Cloud backup of configurations

**Features:** macOS Compatibility

**In-app purchases:** none


### Crestron Zūm

[App page](https://appshunter.io/ios/app/crestron-zum/id1212507034)

This app simplifies wireless lighting control for spaces of any size, from single rooms to entire buildings. It allows users to easily name and group rooms, create custom lighting scenes, and manage daylighting and scheduled events.

**Highlights:** Wireless lighting control, Easy design and setup, Room naming and grouping, Custom scene creation, Daylighting optimization, Scheduled event management

**In-app purchases:** none


## Frequently asked questions

### Is AC Clairity free?

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

### Is Crestron Zūm free?

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

### Which has better reviews, AC Clairity or Crestron Zūm?

Crestron Zūm is rated higher. AC Clairity averages 3.4 out of 5 from 9 ratings, while Crestron Zūm averages 3.6 from 8 ratings.

### Do AC Clairity or Crestron Zūm have ads?

AC Clairity shows ads; Crestron Zūm does not.

### Which is updated more often, AC Clairity or Crestron Zūm?

AC Clairity ships an update every 3 months, and Crestron Zūm every 5 months. Most recently, AC Clairity was updated on November 2, 2026 and Crestron Zūm on November 2, 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.*