Comparison

Precision Bubble Level vs Level Tool

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

Head to head
About

Precision Bubble Level

Features
Read full description

When your hands are full, your wrist has the answer. PrecisionLevel is a digital spirit level for your iPhone and Apple Watch. Place either device on any surface — within a second, you know whether it's level. No squinting at a tiny bubble in a plastic tube. YOUR WRIST, YOUR LEVEL Hanging a shelf while holding it in place? Leveling a washing machine in a tight space? Glance at your watch instead of reaching for your phone. PrecisionLevel on Apple Watch is a standalone app — no phone required. SUB-DEGREE ACCURACY Hardware accelerometer and gyroscope with Butterworth filtering deliver smooth, precise readings. One-tap calibration compensates for your specific device's sensor quirks. SEE IT AT A GLANCE A responsive liquid bubble shows tilt in every direction. Directional arrows tell you which side is high. Color-coded feedback — green when level, amber when close, red when off. You never have to read a number unless you want to. BUILT FOR THE JOB • Multiple units: degrees, percent grade, mm/m, in/ft • Hold & lock — freeze the reading, then move your device • Dark & light themes — OLED-friendly dark mode or high-contrast light • Configurable decimal precision • Minimal battery usage Free. No ads. No in-app purchases. Ever.

About

Level Tool

This app transforms your phone into a precise spirit level and angle finder. It helps you hang frames, install shelves, or mount TVs accurately by indicating tilt to a tenth of a degree. The interface turns green and provides haptic feedback when an object is perfectly level.

Highlights
  • Spirit level functionality
  • Angle finder and inclinometer
  • Surface and bubble level modes
  • Large, readable digits
  • Visual and haptic level indicators
  • Calibration for case accuracy
  • Target angle setting (Pro)
Read full description

Level Tool turns your iPhone into a spirit level and angle finder. Hold it against an edge or lay it on a surface, and the reading shows the tilt to a tenth of a degree. When it is level, the background behind the reading turns green and the phone taps once. Hang a frame, put up a shelf, mount a TV or set a washer on its feet by eye, and you often end up drilling a second hole. Level Tool tells you which side to raise before you drill. TWO TOOLS - Bubble: hold the phone against the top of a frame, a shelf or a TV, upright or on its long edge. It reads the angle of any edge, so it also works as an angle finder and an inclinometer. - Surface: lay the phone face up on a table, a floor or an appliance. It reads side to side and end to end, and tells you which corner to raise. MADE TO READ FROM A LADDER - The angle fills the screen in large digits. - The background behind the reading turns green when it is level, with one tap from the phone and a soft tick you can switch off. - A line under the reading says which side to raise. - Hold freezes the reading, so you can lift the phone off a rafter and read it. CALIBRATE WITH THE CASE ON Calibrate each tool in two steps on any flat table, with the case on. Lay the phone flat for Surface, or stand it on its long edge for Bubble, then turn it around on the same spot. That allows for your case and the camera bump. FOR RVS AND CAMPERS Lay the phone on the floor of an RV or camper, and Surface shows which way it leans and which corner to raise. PRO: ROOF PITCH, SLOPE AND A TARGET ANGLE Pro adds two units to the reading: roof pitch in x/12 and slope in percent. To read a roof, lay the phone flat on a rafter with Surface, or stand it on its long edge along the rafter with Bubble. Pro also sets a target, such as 4/12 or 6/12 for a roof, 2% for drainage or 45°, and the phone taps when you hit it. Bubble, Surface, degrees, Hold and calibration all work without Pro. If you bought Pro in an earlier version, it carries over. Level Tool shows no ads and needs no account. The level works without an internet connection. It does not measure length or distance. Check the next frame you hang before you drill. Terms of Use: https://cmlapps.github.io/leveltool/terms.html Privacy Policy: https://cmlapps.github.io/leveltool/privacy.html

Screenshots

Precision Bubble Level4 screens
Level Tool4 screens

Verdict

The call

The clearest difference is in-app purchases: Precision Bubble Level at none against Level Tool's 2. Precision Bubble Level also leads on update cadence (daily vs every 4 months) and device support (3 vs 1). On price, ads and iOS requirement 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. Level Tool sells 2 in-app purchases, starting at $4.99 per 7 days. Precision Bubble Level asks for nothing beyond the download.

UpkeepUpdate frequency

Precision Bubble Level ships an update daily, Level Tool every 4 months. Both last shipped on October 31, 2026.

Scorecard3 real differences · 6 level
Precision Bubble Level versus Level Tool: the parameters behind the verdict, then further details
ParameterPrecision Bubble LevelLevel Tool
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyDaily — betterEvery 4 months
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size36 MB10 MB
Age rating4+4+
DeveloperAndrey PogorelyyCloud Motion Lab LLC

In-app purchases

None

Precision Bubble Level

No in-app purchases

2 purchases

Level Tool

Subscriptions1
  • Level Tool Pro Weekly3 Days trial$4.997 Days
One-time1
  • Level Tool Pro$9.99

Questions

Is Precision Bubble Level free?
Precision Bubble Level is free to download, with no in-app purchases.
Is Level Tool free?
Level Tool is free to download, with in-app purchases available.
Do Precision Bubble Level or Level Tool have ads?
Neither Precision Bubble Level nor Level Tool shows ads.
Which is updated more often, Precision Bubble Level or Level Tool?
Precision Bubble Level ships an update daily, and Level Tool every 4 months. Most recently, Precision Bubble Level was updated on October 31, 2026 and Level Tool on October 31, 2026.

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