Support

Open the Room tab and tap a lamp in the picture to select it. Drag the arc under the room: left is warm yellow, right is crisp white. The slider below the arc sets the brightness in lumens. Tap the selected lamp again, or the power button, to switch it off or on.

Choose what the light is for under the arc — reading, cooking, dinner and so on. Bulbwick estimates the light level for that activity from your bulbs, the room's floor area, ceiling height and wall colour, and compares it with a comfortable range for homes. It is guidance for choosing bulbs, not a lighting standard.

Tap the ruler button at the top right of the Room tab. Set the floor area, the ceiling height and whether the walls are light, mid-tone or dark. Dark walls swallow light, so the same bulbs feel dimmer.

Tap the split button next to the ruler. The light you have at that moment is frozen as "Before". Change the lamps, and the room is divided by a line you can drag: before on the left, now on the right. Tap the button again to leave the comparison.

In the ruler sheet, "Save this light" keeps the current room as a look; you can keep up to twelve and bring any of them back with a tap. "To note" on the Room tab turns the lamps that are switched on into a shopping note. On the Notes tab you can also start from an old bulb by choosing its watts.

Open the Bulbs tab and tap a cap. It is drawn at real size: hold the metal end of your old bulb against the drawing. Use the arrows or swipe to try the next cap. If the app says the scale is not checked on your phone, calibrate once with a bank card from the same screen.

There is no account and nothing to buy. The app needs no connection for anything it does: rooms, notes, caps and the box decoder all work offline.

Bulbwick may send occasional news about the app. It only shows them if you allow it. Open Settings in the app and use the Notifications switch, or go to iOS Settings → Notifications → Bulbwick.

Open Settings → Help & feedback. Pick a question to see a ready answer, or tap "Write to support", describe the problem, attach a screenshot if it helps and press Send. Nothing is sent until you press Send.

English, Turkish, Portuguese, Spanish, German, French and Italian. Open a note, tap "Show to the seller" and pick the language at the top of the card. The default is set in Settings.

Rooms, looks and notes are stored only on the iPhone, inside the app. Deleting the app deletes them, and they are not restored by reinstalling unless the phone itself was restored from a backup that included them.

Close the app from the app switcher and open it again. If the room still does not respond, restart the iPhone. If it keeps happening, write to us with your iPhone model and iOS version.

Open Bulbs → any cap → "Check the scale", hold a bank card upright against the screen and move the slider until the frame is exactly as wide as the card's short side, then save. Display Zoom in iOS settings can change the scale, so repeat the check if you switch it.

Check that they are allowed in iOS Settings → Notifications → Bulbwick and that Focus is not hiding them. Notifications are occasional, so a quiet week is normal.

If the app cannot reach our server it opens your Mail app with the same message. Without a Mail account it shows our address and lets you copy the text; your draft is kept. You can always write to support@bulbwick.info directly.