# Plumbline Studio vs Bubble Level

The clearest difference is price: Bubble Level at Free against Plumbline Studio's $2.99. 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 $2.99 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. The most recent releases landed on September 8, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Plumbline Studio | Bubble Level |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Monthly |
| 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/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)

**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 $2.99, 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 September 8, 2026 and Bubble Level on September 21, 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.*