# RW.LIGHT vs BrightEMS

The clearest difference is review sentiment: RW.LIGHT at 52% against BrightEMS's 29%. RW.LIGHT also leads on iOS requirement (8.0 vs 15.0). 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.

RW.LIGHT ships an update every 2 weeks, BrightEMS every 3 weeks. The most recent releases landed on September 28, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | RW.LIGHT | BrightEMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.6 (14 ratings)](https://appshunter.io/ios/app/brightems/id6450639649/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | **52.4% of reviews** | 29.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 14 MB | 40 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [凤军 程](https://appshunter.io/developer/873913814) | [Shenzhen Abisda Network Technology Co., Ltd.](https://appshunter.io/developer/1750660585) |

## What reviewers say

### RW.LIGHT

[App page](https://appshunter.io/ios/app/rwlight/id1441094951)

Control smart Bluetooth lights with your smartphone to create vibrant atmospheres and enhance memories. This app allows you to set beautiful colors and illuminate your surroundings with ease.

**Highlights:** Smartphone control, Bluetooth 4.0 connectivity, Atmosphere creation, Color customization, Memory enhancement

**Features:** macOS Compatibility

**In-app purchases:** none


### BrightEMS

[App page](https://appshunter.io/ios/app/brightems/id6450639649)

Manage your energy storage power supply with comprehensive control over switches, charging, and power parameters. Optimize energy usage, schedule charging, and keep your device updated with the latest firmware.

**Highlights:** USB/AC/DC/LED switch control, Energy parameter monitoring, Silent and scheduled charging, Customizable DC charging, Screen and standby time settings, Firmware version upgrades

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RW.LIGHT free?

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

### Is BrightEMS free?

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

### Do RW.LIGHT or BrightEMS have ads?

Neither RW.LIGHT nor BrightEMS shows ads.

### Which is updated more often, RW.LIGHT or BrightEMS?

RW.LIGHT ships an update every 2 weeks, and BrightEMS every 3 weeks. Most recently, RW.LIGHT was updated on September 28, 2026 and BrightEMS on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*