# Plumbline Studio vs Bubble Level

The clearest difference is price: Bubble Level at Free against Plumbline Studio's $0.99. Plumbline Studio's advantage is in-app purchases (none vs 3) and update cadence (every 10 days vs monthly). On ads, device support and iOS requirement there is nothing between them.

Bubble Level is free to download; Plumbline Studio costs $0.99 up front. Bubble Level sells 3 in-app purchases, starting at $4.99 per 7 days. Plumbline Studio asks for nothing beyond the download.

Plumbline Studio ships an update every 10 days, Bubble Level monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Plumbline Studio | Bubble Level |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/bubble-level-angle-finder/id6772273713/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 5 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Robert Corbin](https://appshunter.io/developer/1890247992) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### Plumbline Studio

[App page](https://appshunter.io/ios/app/plumbline-studio-level-tool/id6771016320)

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

**In-app purchases:** none


### Bubble Level

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

This app acts as a digital tool to measure angles and levels on your phone. It provides precise readings for verticality, flatness, and slopes in various units, helping you achieve accurate results for DIY projects and professional tasks.

**Highlights:** Digital plumb bob for true vertical checks, Two-axis surface level for flatness, Angle measurement in degrees, percent grade, and roof pitch, Hold function to freeze readings, Timestamped log of measurements, Fine calibration for accuracy

**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 Plumbline Studio free?

Plumbline Studio costs $0.99, with no in-app purchases.

### Is Bubble Level free?

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

### Do Plumbline Studio or Bubble Level have ads?

Neither Plumbline Studio nor Bubble Level shows ads.

### Which is updated more often, Plumbline Studio or Bubble Level?

Plumbline Studio ships an update every 10 days, and Bubble Level monthly. Most recently, Plumbline Studio was updated on October 24, 2026 and Bubble Level on October 24, 2026.

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