PlumbLine: Level & Plumb
Straighten walls in seconds
Only for iPhone
$1.99 · Designed for iPhone. Not verified for macOS.
iPhone
Are your walls, shelves and frames truly straight? Hold your phone to the surface — the whole screen turns green the instant it is. Plumb and level in one app.
Is that wall truly vertical? Is that shelf actually level? Hold your iPhone against the surface and PlumbLine tells you instantly — no bubble to squint at, no numbers to read. The whole screen turns green the moment it's straight.
HOLD IT, DON'T READ IT
- Press the back of your phone flat against a wall, post, door frame, shelf or picture frame
- A big target view shows the tilt front-to-back and left-to-right at a glance
- The screen flashes green with a beep and a tap the instant the surface is true — so you can adjust with your eyes on the wall, not the phone
VERTICAL AND HORIZONTAL, AUTOMATICALLY
- Put the phone upright against a wall and PlumbLine checks plumb (vertical)
- Lay it flat on a shelf and it checks level (horizontal)
- It senses how you're holding it and switches — you never pick a mode
MADE FOR STRAIGHTENING THINGS
- Hanging pictures and shelves, setting fence posts, aligning door frames, leveling furniture and appliances
- Set your tolerance: strict, standard or rough — the color verdict follows it
- Zero it against an existing surface to match a new one to it
SMALL TOUCHES THAT HELP
- Hold the reading to freeze it, then step back and check a spot you can't watch
- Save measured surfaces with a name to compare them later
- Choose degrees, percent slope or mm/m
PRIVATE AND SIMPLE
- One-time purchase. No subscription, no ads, no account
- Works fully offline. Nothing you measure ever leaves your device
PlumbLine is a planning aid. For precision construction, use a calibrated tool.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Yoshiaki Hirokawa, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yoshiaki Hirokawa
- Size
- 2.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 43 more
- English, Arabic, Bengali, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Korean, Malay, Malayalam, Marathi, Norwegian Bokmål, Oriya, Polish, Portuguese, Punjabi, Romanian, Russian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © 2026 netflowers
