Comparison

Bubble Level vs Smart Level

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Bubble Level

This utility app functions as a precise spirit level for your iOS devices. It's ideal for tasks like aligning picture frames, measuring angles, and checking the levelness of various surfaces. The app offers calibration and accurate readings to a tenth of a degree.

Highlights
  • Measure surface level
  • Calibrate with one click
  • Accurate to 0.1 degree
  • Retina display support
  • Picture frame alignment
  • Angle and slope measurement
Features
Read full description

Bubble Level is an accurate and simple to use spirit level for your iPhone, iPad and iPod touch. It's great for aligning picture frames or for angle measurements. Features: ◉ Measure the level of any surface. ◉ It can be calibrated with the click of a button and the calibration is saved automatically. ◉ It's accurate to one tenth of a degree. ◉ Full Retina support. This tool can be used for: ◉ Picture frame alignment ◉ Measuring angles and slopes ◉ Checking the surface level of tables, shelves or any other object ◉ Measuring the inclination of a ship, aircraft or car ◉ Roof pitch calculation ▶ Calibration instructions: - To calibrate the level, hold the device upright against a reference surface ( landscape mode with the button to the left ) and press the red Calibrate button. Download this app today!

About

Smart Level

This utility app transforms your smartphone into a precise spirit level. It measures horizontal and vertical surfaces, displaying the angle of inclination. Ideal for home repairs and professional use, it offers ease of use and accurate readings.

Highlights
  • Smartphone spirit level
  • Measures horizontal and vertical surfaces
  • Displays angle of inclination
  • Bull's eye level for 2D measurement
  • Precise and easy to use
Features
Read full description

Reduce the weight of your toolbox – all you need is your smartphone. Also known as a spirit level or buble level – but the name doesn’t matter. What matters is the fact, that with the help of this device you can easily determine whether a given surface is really horizontal. Used by professionals: builders, stonemasons, carpenters, inspectors, metalworkers, but also by ordinary DIY enthusiasts – our spirit level will certainly help you with any home repairs. Our device is based on bull's eye level (also known as circular bubble) which measures the level simultaneously in two dimensions – horizontal and vertical. Netigen Utilities: Level checks not only whether a surface is horizontal, but also shows the angle of inclination. If the surface is horizontal, the ball, shown on the screen, will be in the exact center of the circle and the center will turns white. It works just like a physical device! Ease of use, precision and a unique design distinguish our level, comparing to other similar applications. Recommended for those who appreciate precise tools and job well done.

Screenshots

Bubble Level2 screens
Smart Level3 screens

Verdict

The call

The clearest difference is rating: Bubble Level at 4.6 against Smart Level's 3.5. Bubble Level also leads on ratings volume (3.1K vs 2). Smart Level's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Bubble Level sells 1 one-off in-app purchase and Smart Level sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Bubble Level holds the better App Store score, 4.6 against 3.5. That said, the two scores are not equally well evidenced: Bubble Level has 3.1K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Bubble Level ships an update every 10 months, Smart Level every 12 months. The most recent releases landed on October 20, 2026 and October 10, 2026 respectively.

Scorecard5 real differences · 5 level
Bubble Level versus Smart Level: the parameters behind the verdict, then further details
ParameterBubble LevelSmart Level
PriceFreeFree
Rating4.6 (3.1K ratings) — better3.5 (2 ratings)
Positive reviews29.4% of reviews—
Number of ratings3.1K — better2
Update frequencyEvery 10 months — betterEvery 12 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.07.0 — better
Further details — not scored
Size20 MB23 MB
Age rating12+4+
DeveloperNetviking ABNETIGEN Kluzowicz sp. j.

Customer experience

Bubble Level

All ratings3,062 ratings
Positive91.2%
Neutral3.6%
Negative5.2%
Written reviews201 reviews
Positive29.4%
Neutral1.5%
Negative69.2%

Smart Level

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

Bugs and requests

Bubble Level

Reported bugs

3 issues
  • Ads crash the app
  • Inability to exit the app due to ads
  • Calibration button doesn't work as expected

Requested features

2 requests
  • Percent slope display option
  • Ability to rotate bubble to vertical position

Smart Level

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Bubble Level

One-time1
  • Pro Upgrade$4.99
1 purchases

Smart Level

One-time1
  • AdFree$0.99

Questions

Is Bubble Level free?
Bubble Level is free to download, with in-app purchases available.
Is Smart Level free?
Smart Level is free to download, with in-app purchases available.
Which has better reviews, Bubble Level or Smart Level?
Bubble Level is rated higher. Bubble Level averages 4.6 out of 5 from 3.1K ratings, while Smart Level averages 3.5 from 2 ratings.
Do Bubble Level or Smart Level have ads?
Bubble Level shows ads; Smart Level does not.
Which is updated more often, Bubble Level or Smart Level?
Bubble Level ships an update every 10 months, and Smart Level every 12 months. Most recently, Bubble Level was updated on October 20, 2026 and Smart Level on October 10, 2026.

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