# Atomi Smart vs ATCD

The clearest difference is iOS requirement: ATCD at 12.0 against Atomi Smart's 14.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Atomi Smart ships an update every 3 months, ATCD every 2 months. The most recent releases landed on September 25, 2026 and March 25, 2026 respectively.

## The numbers

| Metric | Atomi Smart | ATCD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (20K ratings)](https://appshunter.io/ios/app/atomi-smart/id1414704585/reviews)** | — |
| Number of ratings | **20K** | — |
| Positive reviews | 24.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 198 MB | 35 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Atomi Inc](https://appshunter.io/developer/1414704584) | [ZHUHAI REDBAY CO., LTD](https://appshunter.io/developer/1725503748) |

## What reviewers say

### Atomi Smart

[App page](https://appshunter.io/ios/app/atomi-smart/id1414704585)

Control your home appliances like lighting, plugs, and heaters remotely. Schedule device operation, customize settings, and receive notifications for peace of mind. Manage all your smart devices from anywhere, anytime.

**Highlights:** Remote device control, Scheduling and timers, Customizable lighting effects, Temperature monitoring, Real-time notifications, Device grouping

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy setup
- 🚀 Customizable lighting options
- 🚀 Integrates with smart home devices
- 👍 Durable construction
- 👍 Attractive design

**What reviewers complain about**

- 🐛 Connectivity issues
- 🐛 Inconsistent performance
- 🐛 Buggy app
- 🔋 Power outage causes problems
- 👎 Limited customization options

**Reported bugs**

- Lights randomly disconnect from Wi-Fi
- Schedules not working as expected
- App crashes or becomes unresponsive
- Temperature reading inaccuracies

**Requested features**

- More customizable color and scene options
- Ability to control all lights simultaneously
- Integration with Siri/HomeKit
- Improved app interface and stability


### ATCD

[App page](https://appshunter.io/ios/app/atcd/id6476090339)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Atomi Smart free?

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

### Is ATCD free?

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

### Do Atomi Smart or ATCD have ads?

Neither Atomi Smart nor ATCD shows ads.

### Which is updated more often, Atomi Smart or ATCD?

Atomi Smart ships an update every 3 months, and ATCD every 2 months. Most recently, Atomi Smart was updated on September 25, 2026 and ATCD on March 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.*