DumbLevel
It's just a level. And a project planner.
A bubble level for iPhone, plus a planner that works out where every nail goes for pictures, shelves, hooks and curtain rods, then prints the plan. Free. No ads. No subscription, ever.
- No subscription
- No ads
- No account
- Nothing leaves your phone
The level
Reads to a tenth of a degree, and says which end is high.
Set it on its edge, stand it up, or lay it flat. It picks the mode by itself and gives you the number in type big enough to read from a ladder.
- Green, amber, redWithin two tenths of a degree is green. Then amber, then red.
- It says it in wordsRIGHT END HIGH. TOP LEANS LEFT. LEVEL. No squinting at a bubble.
- HoldFreezes the reading so you can lift the phone off the shelf and read it.
- Sounds you can work byPings that speed up as you get close and a chime at level, so you can watch the shelf instead of the phone.
- Honest calibrationCapture, turn the phone end for end on the same spot, capture again. The phone's own error cancels out. Same trick the precision digital levels use.
- Up is upThe readout turns itself so up on the screen is up in the room, whichever way you hold it.
Like every phone level, it is only as good as the sensor inside the phone, so calibrate it before you trust it and check anything that matters with a real level. It is a phone.
The planner
Pretty smart, for being a DumbLevel.
Tap Hang and it asks, "What are we doing?" A few plain questions later you have every mark, measured from the end of the wall, ready to read straight off a tape.
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1Pick the job
One picture, a row of frames, a gallery grid, shelves, coat hooks or a curtain rod.
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2It does the math
A to-scale drawing, and every mark in inches from the end of the wall. Or centimeters.
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3One mark at a time
Giant numbers you can read with a pencil in your other hand. The arrow points the way to measure.
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4Print the project
Print the sheet or share it as a PDF. Tape it up, then tap Level it and the level checks each piece.
The usual rules, already filled in. Pictures centered at 57 inches. 6 to 10 inches above a couch or a dresser. 2 to 3 inches between frames. A curtain rod 4 to 6 inches above the window and past it on each side. Coat hooks at 60. Change any number you like.
Printouts
Print the project. Tape it to the wall.
These are real sheets from the app, exactly as they come out of the printer. Tap one to open the PDF.
A record wall28 ledges, 4 rows of 7. Open the PDF
A row of framesThree 16 × 20s, evenly spaced.
A gallery gridSix 11 × 14s, 3 across, 2 rows.
ShelvesTwo 36-inch shelves, bracket by bracket.
A curtain rodBoth brackets, measured off the window.
Coat hooksFour in a row, 10 inches apart.
One pictureCentered, at eye level.
Plain black on white, US Letter, so any printer will do. Every sheet ends with the same reminder: check for wires and pipes before you drill.
Past projects
It remembers.
Every job you measure is kept on the phone under Past projects. Open the hallway you did last spring, see the same numbers, and hang the next frame to match. Give them names, or delete the ones you're done with.
The price
Free. That's the whole deal.
- No subscription
- No account
- No ads
- No timer
- No analytics
- No internet
Get DumbLevel on the App StoreFree · iPhone
Most phone levels now charge by the week and lock you out after twenty seconds. This one is free, and it leaves you alone.
The level built into your phone shows whole degrees and has no calibration. If that's enough for the job, you don't need this one.
Privacy policy
Effective September 23, 2026
DumbLevel is a bubble level and wall-layout planner for iPhone. This policy is short because there is not much to say.
What the app collects
Nothing. DumbLevel does not collect, store or send any personal information, usage data, crash reports or analytics. There is no account, no sign-in and no way for the app to know who you are.
What stays on your phone
Two things, both saved in the app's own storage on the phone:
- Your hang jobs: the one you're working on and your Past projects (up to 20), meaning which job you picked, the numbers you typed and any name you gave it, so they are still there when you come back.
- Your settings: sound choice, units, your calibration, and whether you've seen the tips.
None of this leaves the device. Deleting the app deletes all of it. If you use iCloud backup for your phone, Apple may include the app's data in that backup under your own Apple account; DumbLevel has no access to it.
The motion sensor
DumbLevel reads the iPhone's built-in tilt sensor (accelerometer, through Apple's Core Motion) for one reason: to show whether the surface the phone is resting on is level. The readings are used on the spot to draw the screen and are not recorded, stored or transmitted.
No network
The app contains no network code. It does not connect to the internet, ever. It cannot contact us, and we cannot contact it.
No third parties
There are no third-party software kits inside DumbLevel: no analytics, no advertising, no crash reporting, no social features. Your purchase is handled entirely by Apple's App Store under Apple's own privacy policy.
This website
The app and this website are separate things. The app has no network code at all. The website, like almost every website, keeps a visit log on its own server: the page asked for, the time, the kind of browser, the page you came from, and a shortened internet address. The last part of the address is dropped before anything is written down, so the log never holds a full address. The log is used for one thing, counting visits and seeing roughly which countries they come from, by a program that runs on the same server. There are no cookies and no tracking code on the page, and nothing is shared with or sold to anyone. The log itself is deleted after 14 days. The counting program keeps only daily counts: visitors, pages, kinds of device, referring sites and countries. To tell one visitor from another it uses a scrambled one-way code for today and yesterday, then throws the codes away. It never stores an address, full or shortened.
Children
The app is rated 4+ and collects no data from anyone, of any age.
Changes
If this policy ever changes, the new version will be posted on this page with a new effective date. Since the app has no network access, the app itself cannot notify you; this page is the record. The September 23, 2026 update describes Past projects, which are stored on the phone like everything else, and how this website counts visits. The app still collects nothing.
Contact
Questions: support@dumblevel.com
Support
Something wrong, or a shelf that still isn't straight? Email and a person answers.
Helpful to include: your iPhone model, the iOS version, whether you ran the two-step calibration, and for a hanging question, which job you picked and the numbers you typed. The Simulator on a Mac has no tilt sensor, so the level only reads on a real phone.