Your Sengled Wi-Fi lights, back on your iPhone.

The Sengled Home app won't sign you in? Relight is an independent iPhone app that talks to Sengled Wi-Fi bulbs directly over your home Wi-Fi. No account, no cloud, nothing to log in to.

Relight is in App Review

Free for 2 lights. Relight Pro is a one-time $3.99.

Relight's home screen: lights grouped by room with on/off switches, and scene buttons

A floor lamp at 80% warm white on Relight's brightness dial

A bedside bulb set to purple at 20% with the colour picker

The setup steps for a bulb that was reset: 5 quick off-on flips until it blinks

A reset bulb back on Wi-Fi, ready to name

Making a scene that sets several lights at once

What it does

Finds your lights on your Wi-Fi in a few seconds, and lists every one.
On and off, brightness, warm to cool white and colour, with a warm white that looks warm and a candle-like amber for evenings.
Names and rooms, with all on or all off per room.
Sets up a reset bulb again without an account (the newest part; see below).
Pro, once: every light, scenes, Siri and Shortcuts actions, schedules through a Shortcuts automation, and a Home Screen widget. Family Sharing included.

Good to know before you download

Wi-Fi bulbs only. The code on the base starts with W (W21-N13, W11-N13, W31-N15...). Zigbee (E) and Bluetooth (B) bulbs don't join your Wi-Fi, so Relight can't reach them. Which do I have?
At home only. No cloud means your iPhone has to be on the same Wi-Fi as the bulbs, and schedules run from your iPhone.
No Alexa or Google Home. Siri works through Shortcuts with Pro.
Setting up reset bulbs is new. Controlling bulbs that are still on your Wi-Fi was tested on a real W21-N13; the in-app setup for reset bulbs follows the same steps but hasn't been tried on every model yet.
iPhone with iOS 17 or later. A built-in demo shows how it works before you have a bulb to hand.

Private by design

Relight collects nothing. Commands go straight from your iPhone to your lights. Your Wi-Fi password, typed during bulb setup, goes only to the bulb and isn't kept. Privacy policy.

Questions

Which bulbs does Relight work with?

Sengled Wi-Fi bulbs and strips: the model code on the base starts with W, like W21-N13, W11-N13 or W31-N15. Zigbee (E) and Bluetooth (B) bulbs don't work with it.

Do I need a Sengled account?

No. Relight talks to the bulbs directly on your home Wi-Fi. There is no Sengled sign-in and no Relight account.

Is it free?

Full control of 2 lights is free, and you choose which 2. Relight Pro is a one-time $3.99 for every light, scenes, Siri and Shortcuts, and a Home Screen widget. No subscription; Family Sharing included.

Can I control my lights away from home?

No. Relight has no cloud by design, so your iPhone has to be on the same Wi-Fi as the bulbs.

Does it work with Alexa or Google Home?

No. With Relight Pro you can use Siri through Shortcuts while your iPhone is home.

Can it set up a bulb that was reset?

Yes, Relight has a setup flow for reset bulbs, with no account. It is the newest part of the app and hasn't been tried on every model yet, so if your bulbs still work, don't reset them just to use it.

Something not working?

See Relight support, or email hello@tomorrowish.dev with your bulb's model code and what you see.

Sengled bulb help

Plain, sourced answers that work with or without Relight: