Have you ever had the impression that your floor is kind of tilted?

Or that a piece of furniture never stays in the right place, no matter how much you try to adjust it? This may not just be an impression: the truth is that many homes have small unevenness invisible to the naked eye, but which cause discomfort in everyday life.

And the best part: no need to hire anyone to verify this. Today, with current technology, Your own cell phone can measure whether your house is level or crooked, with the help of free apps that use the device's sensors to detect inclinations with surprising accuracy.

How does it work?

These applications use the gyroscope and accelerometer of the smartphone — sensors that already exist in most modern devices. With them, it is possible to transform the cell phone into a digital ruler with bubble level, similar to the instruments used by bricklayers and architects.

You can measure:

  • Inclination of the floor

  • Leveling of tables and furniture

  • Alignment of shelves

  • Doors and windows that don't close properly

  • And even crooked walls

Just open the app, place your phone on the desired surface and see the degree of inclination directly on the screen.

Best Apps to Level Your House (Free)

Here are the best apps to check if your house is crooked, all available in the official stores and with free versions:

1. Bubble Level

📱 Android | iOS
💵 Free

One of the most popular and simple apps for level surfaces using your cell phone. It simulates the classic bubble level and accurately shows whether the location is straight or inclined. It works both horizontally and vertically.

Features:

  • Visual indication with bubble

  • Exact degree of inclination

  • Simple and lightweight interface

  • No internet needed

🟢 Ideal for: those who want a fast and straight to the point app.

Bubble Level

Classification: 4,8/5
Price: Free

Download for Android

Download For Iphone

2. Clinometer + Bubble Level

📱 iOS
💵 Free (with optional purchases)

More complete, the Clinometer combines the traditional bubble look with a digital inclination ruler. Widely used by carpentry, architecture and renovation professionals.

Features:

  • Accurate measurement in degrees and percentages

  • Support for multiple axes

  • Allows calibration for better accuracy

  • Great for sloped surfaces and walls

🟢 Ideal for: those who want more precision or work with construction and renovations.

Clinometer

Classification: 4,6/5
Price: Free

Download for Android

Download For Iphone

3. Measure (Google)

📱 Android
💵 Free

Developed by Google, this app uses augmented reality to measure objects, distances and even unevenness. Simply point the camera and position the measurement points on the screen.

Features:

  • Visual measurement by AR (augmented reality)

  • Easy to use with the camera

  • Can measure objects in real time

  • Great for checking floors, walls and windows

🟢 Ideal for: those who like technology and want to measure in a practical way.

Smart Measure

Classification: 3,5/5
Price: Free

Download for Android

🧪 Try it now

You can test it right now at home:

  1. Download one of the apps suggested above.

  2. Place your phone on the floor, a table, shelf or piece of furniture.

  3. See on the screen if the level is straight (0°) or inclined.

  4. Repeat in different rooms of the house.

If the value is different from 0°, your house or furniture is uneven.

❓FAQ – Frequently Asked Questions

→ Can the app really detect if the house is crooked?
Yes. It detects surface inclination with good accuracy. Although it is not a substitute for a technical report, it is very helpful for home adjustments.

→ Do these apps work on any cell phone?
They work on smartphones with gyroscope and accelerometer sensors (present in most current models).

→ Can I use it to hang pictures and assemble furniture?
Yes! These apps are great for making sure everything is aligned and level.

→ Do you need internet?
No. Most apps work offline because they use the device's internal sensors.

→ Are they really free?
Yes, they all have a free version with the main functions. Some offer premium versions with more features.

If you've always suspected that that table is crooked, or that the door closes by itself without wind, now you can clear up any doubts. With these free apps, you can turn your cell phone into a digital level and test the slope of any part of your home — without spending a dime.

Download one of the recommended apps now, try it out and see for yourself: Is your house really level?

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