# Plumb vs Bubble Level

Plumb and Bubble Level are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Plumb sells 1 in-app purchase, starting at $9.99 per year and Bubble Level sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Plumb ships an update every 3 weeks, Bubble Level monthly. The most recent releases landed on October 18, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Plumb | Bubble Level |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/plumb-bubble-spirit-level/id6760734372/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | — |
| Size | 2 MB | 5 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [National Tool Works LLC](https://appshunter.io/developer/1885230787) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### Plumb

[App page](https://appshunter.io/ios/app/plumb-bubble-spirit-level/id6760734372)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plumb Pro | $9.99 | per year |


### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-angle-finder/id6772273713)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bubble Gauge Weekly | $4.99 | per 7 days |
| Slope Finder Yearly | $24.99 | per year |
| Angle Meter, Pay Once | $49.99 | one-time |


## Frequently asked questions

### Is Plumb free?

Plumb is free to download, with in-app purchases available.

### Is Bubble Level free?

Bubble Level is free to download, with in-app purchases available.

### Do Plumb or Bubble Level have ads?

Neither Plumb nor Bubble Level shows ads.

### Which is updated more often, Plumb or Bubble Level?

Plumb ships an update every 3 weeks, and Bubble Level monthly. Most recently, Plumb was updated on October 18, 2026 and Bubble Level on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*