Your lock screen
is now a ruler.
True-scale wallpapers drawn at your iPhone's exact pixel density. 1 cm on screen is 1 cm in real life, with inches and 30° / 45° / 60° angle guides too.
- Models
- 20
- Palettes
- 7
- Accuracy
- ±0.03
iPhone models,
14 → 18 Pro Max
workshop
palettes
mm worst-case
error
Pick your iPhone
Choose a palette
Download
Your wallpaper
Choose your iPhone above
Set it as your lock screen
- 01
Save it to Photos
On iPhone, open the image, press and hold it, then tap Save to Photos. On a computer, AirDrop it to your phone.
- 02
Add a new wallpaper
Go to Settings → Wallpaper → Add New Wallpaper → Photos and pick the image.
- 03
Don't zoom
It's already the exact size of your screen. If it looks zoomed in, pinch out until the edges line up.
- 04
Measure
Lay the item along an edge, starting at the 0 corner. Turn brightness up for the finest ticks.
Quick check: a standard credit card is 85.6 mm wide. Line one up against the centimetre scale.
MacBook Pro 16-inch M2 Max
The same seven palettes at 3456×2234, 254 ppi, with the scale kept clear of the Dock. Set it with “Fill Screen” in System Settings → Wallpaper.
Unlock with your email above to download.
Questions
Is it really accurate? +
Every wallpaper is drawn for one specific screen using Apple's published resolution and pixel density, and every line snaps to the pixel grid — the worst-case error is half a pixel, about 0.03 mm. Each model has been checked against a physical ruler.
Two models have the same screen — does it matter which I pick? +
Phones that share a resolution and pixel density (like the iPhone 16 Pro and iPhone 17) measure identically, so either file works. Pick your exact model anyway and you get the right name on the file.
Why does it look zoomed on my lock screen? +
The image is already the exact size of your screen. If iOS has zoomed in, open the wallpaper editor and pinch out until the edges line up, then tap Done.
Is it actually free? +
Yes. Drop your email once and every palette for every model unlocks. You’ll get the Workshop newsletter — new builds and maker tips — and can unsubscribe anytime.