# Bubble Level vs Smart Obra

The clearest difference is in-app purchases: Smart Obra at none against Bubble Level's 5. Smart Obra also leads on iOS requirement (15.1 vs 17.6). Bubble Level's advantage is update cadence (every 2 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Bubble Level sells 5 in-app purchases, starting at $3.99 per month. Smart Obra asks for nothing beyond the download.

Bubble Level ships an update every 2 weeks, Smart Obra every 3 months. The most recent releases landed on September 18, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Bubble Level | Smart Obra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (10 ratings)](https://appshunter.io/ios/app/bubble-level-angle-and-ruler/id6746100987/reviews)** | — |
| Number of ratings | **10** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 39 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Ungo Inc.](https://appshunter.io/developer/1813952838) | [Vision360 Innovations](https://appshunter.io/developer/1880772929) |

## What reviewers say

### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-angle-and-ruler/id6746100987)

This app provides precise digital measurements for leveling and angle detection, acting as a spirit level, ruler, and laser tool. It helps with various tasks like furniture assembly, hanging decor, and construction projects, offering real-time feedback and the ability to save and share measurements.

**Highlights:** Precise spirit level with 0.1 degree accuracy, Integrated laser measurement tool, Digital ruler for length measurement, Save, note, and export measurements, Customizable themes and settings, Offline functionality

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bubble Level Premium | $3.99 | per month |
| Weekly Premium | $3.99 | per 7 days |
| Bubble Level Weekly | $4.99 | per 7 days |
| Remove All Ads | $19.99 | per year |
| Bubble Level Lifetime | $39.99 | one-time |


### Smart Obra

[App page](https://appshunter.io/ios/app/smart-obra/id6759808564)

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

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Level free?

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

### Is Smart Obra free?

Smart Obra is free to download, with no in-app purchases.

### Do Bubble Level or Smart Obra have ads?

Neither Bubble Level nor Smart Obra shows ads.

### Which is updated more often, Bubble Level or Smart Obra?

Bubble Level ships an update every 2 weeks, and Smart Obra every 3 months. Most recently, Bubble Level was updated on September 18, 2026 and Smart Obra on September 20, 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.*