Comparison

Bubble Level vs Plumb

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

Head to head
About

Bubble Level

Transform your device into a precise bubble level, angle gauge, and measuring tool. Ideal for home improvement, construction, and DIY projects, it offers real-time tilt readings and surface alignment for professional accuracy.

Highlights
  • Live angle measurement
  • Classic bubble level view
  • Plumb checker
  • 360° surface alignment
  • Independent calibration
  • Clear visual tilt display
Features
Read full description

Turn your iPhone into a high-precision bubble level, angle gauge, and measuring tool. Whether you're mounting shelves, aligning frames, laying tile, or building a deck, this app gives you professional accuracy on the go. Use your device to check if surfaces are level, plumb, or at a specific angle. Get real-time tilt readings in degrees with the built-in inclinometer, or calibrate your phone to another object for relative alignment. This versatile tool is perfect for any construction, home improvement, or DIY project. Features: • Live angle measurement with digital inclinometer • Classic bubble view for horizontal and vertical levels • Built-in plumb checker for vertical surfaces • 360° surface alignment support in any orientation • Independent calibration or object-relative zeroing • Clear visual tilt display with smooth responsiveness • Clean, modern interface — no clutter or ads • Works in portrait and landscape modes Ideal for contractors, handymen, and DIYers alike, this tool makes it simple to measure, align, and build with confidence. Whether you're working inside or outside, this app gives you the accuracy of a hardware level — right on your iPhone. Download now and make every angle perfect with the easiest leveling tool you'll ever use. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Plumb

This tool simulates a physical spirit level with realistic physics and fluid optics. It offers multiple display modes for angles and surfaces, with customizable feedback for precise measurements. Features include calibration, night mode, and various themes for different lighting conditions.

Highlights
  • Realistic bubble level physics
  • Surface bullseye level
  • Customizable angle measurement
  • Multiple display modes
  • Auto-orientation detection
  • Hold reading function
  • Visual, audio, and haptic feedback
Read full description

Plumb is a precision bubble level that looks and feels like the real thing — machined bezel, genuine spring-damper physics, and a vial with real fluid optics. Check level, plumb, any angle, or a whole surface at once. No ads. No account. No tracking. The bubble moves with genuine spring-damper physics. The bezel looks like machined rubber. The vial renders with real fluid optics. When you hit level, the screen flashes, a tone fires, and the phone vibrates — all at once, so you can feel it without looking. LEVEL TAB The main vial reads roll in portrait or landscape. Lock orientation from the toolbar — portrait, landscape left, landscape right, or auto. Lock a reading to free up your hands. Calibrate to any known flat surface with one tap. SURFACE TAB A bullseye level checks both axes simultaneously. Perfect for countertops, appliances, equipment, and anything that needs to be flat in every direction at once. ANGLE TAB Dial in any target angle — 45°, 22.5°, a custom pitch, or a grade percentage — and get live feedback as you approach it. Great for trim work, ramps, crown molding, roofing, and drainage slopes. SIX DISPLAY MODES Choose how angles are shown — degrees, percentage, mm/m, pitch (X.X:12), or in/ft. Each tab has its own independent display mode. Tap any readout to cycle through options. WORKS EVERY WAY YOU HOLD IT Portrait, landscape left, landscape right, face-up, face-down — Plumb reads correctly in every orientation automatically. No mode to switch, no setup required. HOLD Freeze any reading with one tap, one volume button press, or the Action button. Press again to release. A haptic confirms when hold is activated or released. FEEDBACK THAT KEEPS UP WITH YOU Tone — pitch rises as you approach level, fires a clean confirm when you hit it Flash — the camera flash pulses on level, useful in dark spaces Haptic — a firm tap through the phone the moment you're on target NIGHT MODE A dedicated all-black theme with deep red vial and glow ring. Designed for attics, crawl spaces, and low-light conditions where a bright yellow screen is a liability. SIX THEMES Yellow, Red, Black, Sky Blue, Orange, and Night mode. CALIBRATION Per-orientation calibration profiles. Calibrate portrait, landscape left, landscape right, and flat independently. Reset any profile individually or all at once. NO ADS. NO TRACKING. Plumb does one thing and does it right. Nothing phones home. Nothing asks for your email. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://nationaltoolworks.com/apps/plumb/privacy

Screenshots

Bubble Level4 screens
Plumb4 screens

Verdict

The call

Bubble Level and Plumb both sit at 4.5 stars, but that hides the real split: 100% of Plumb's written reviews are positive against 25% of Bubble Level's. Plumb also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). Bubble Level's advantage is ratings volume (63 vs 10) and device support (3 vs 1). On price, rating, in-app purchases 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. Bubble Level sells 6 in-app purchases, starting at $0.99 per 7 days and Plumb sells 1 in-app purchase, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for Bubble Level against 4.6 for Plumb. That said, the two scores are not equally well evidenced: Bubble Level has 63 ratings behind it against 10, so its average is the more settled of the two. Written reviews are what separate them: 25% of Bubble Level's written reviews are positive against 100% of Plumb's.

UpkeepUpdate frequency

Bubble Level ships an update every 2 months, Plumb every 3 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard6 real differences · 4 level
Bubble Level versus Plumb: the parameters behind the verdict, then further details
ParameterBubble LevelPlumb
PriceFreeFree
Rating4.5 (63 ratings)4.6 (10 ratings) — better
Positive reviews25.0% of reviews100.0% of reviews — better
Number of ratings63 — better10
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better16.0
Further details — not scored
Size17 MB2 MB
Age rating4+4+
DeveloperVicki PartridgeNational Tool Works LLC

Customer experience

Bubble Level

All ratings61 ratings
Positive90.2%
Neutral3.3%
Negative6.6%
Written reviews4 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

Plumb

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

6 purchases

Bubble Level

Subscriptions5
  • Weekly Subscription7 Days trial2 variants$0.997 Days
  • Monthly Subscription7 Days trial$2.991 Month
  • Monthly Subscription7 Days trial$4.991 Month
Show 2 more
  • Yearly Subscription7 Days trial$9.991 Year
  • Yearly Subscription7 Days trial$49.991 Year
One-time1
  • Remove Ads$1.99
1 purchases

Plumb

Subscriptions1
  • Plumb Pro14 Days trial$9.991 Year

Questions

Is Bubble Level free?
Bubble Level is free to download, with in-app purchases available.
Is Plumb free?
Plumb is free to download, with in-app purchases available.
Which has better reviews, Bubble Level or Plumb?
Plumb is rated higher. Bubble Level averages 4.5 out of 5 from 63 ratings, while Plumb averages 4.6 from 10 ratings.
Do Bubble Level or Plumb have ads?
Bubble Level shows ads; Plumb does not.
Which is updated more often, Bubble Level or Plumb?
Bubble Level ships an update every 2 months, and Plumb every 3 weeks. Most recently, Bubble Level was updated on November 3, 2026 and Plumb on November 5, 2026.

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