# Bubble Level vs 4Wheel Aligner

The clearest difference is in-app purchases: 4Wheel Aligner at none against Bubble Level's 11. 4Wheel Aligner also leads on ads (none vs shown) and iOS requirement (8.1 vs 16.6). Bubble Level's advantage is update cadence (weekly vs every 6 months). On price and device support there is nothing between them.

Both are free to download. Bubble Level sells 11 in-app purchases, starting at $1.99 per 7 days. 4Wheel Aligner asks for nothing beyond the download.

Bubble Level ships an update weekly, 4Wheel Aligner every 6 months. The most recent releases landed on October 17, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Bubble Level | 4Wheel Aligner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (702 ratings)](https://appshunter.io/ios/app/bubble-level-ar-angle-finder/id1594066382/reviews)** | — |
| Number of ratings | **702** | — |
| Positive reviews | 41.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 6 months |
| Monetization | Free with in-app purchases | — |
| Size | 43 MB | 3 MB |
| Requires iOS | 16.6 | **8.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jens Rieckhof](https://appshunter.io/developer/354266124) | [思 李](https://appshunter.io/developer/1611668585) |

## What reviewers say

### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-ar-angle-finder/id1594066382)

This app transforms your phone into a precise leveling tool. It offers accurate angle measurement, inclination detection, and augmented reality features for DIY and professional use. Calibration is simple and quick.

**Highlights:** Ultra-precise angle measurement, Inclination and slope meter, Augmented reality ruler and protractor, Effortless one-touch calibration, Clear and easy-to-read display, User-friendly interface

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Weekly Plan | $1.99 | per 7 days |
| Spirit Level Premium – Monthly | $2.99 | per month |
| Bubble Level Premium - Weekly | $2.99 | per 7 days |
| Bubble Level Premium - Monthly | $5.99 | per month |
| Spirit Level Premium – Annual | $14.99 | per year |
| Bubble Level Premium - Annual | $19.99 | per year |
| All features - No ads | $1.99 | one-time |
| Unlock all AR features | $5.99 | one-time |
| Discount Lifetime Premium | $14.99 | one-time |
| Bubble Level PREMIUM Lifetime | $19.99 | one-time |
| Bubble Level - Lifetime Premium | $29.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🔍 Accurate angle measurements
- 🛠️ Helpful for various tasks (telescopes, leveling, etc.)

**What reviewers complain about**

- 🤑 Expensive ad removal
- 🤖 Unreliable calibration
- 💤 Constant interruptions and ads
- 🚫 Unusable due to ads

**Reported bugs**

- App crashes on launch
- Measurement point behaves erratically

**Requested features**

- Ability to calibrate the app
- Option to change the display color


### 4Wheel Aligner

[App page](https://appshunter.io/ios/app/4wheel-aligner/id1616582492)

**In-app purchases:** none


## Frequently asked questions

### Is Bubble Level free?

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

### Is 4Wheel Aligner free?

4Wheel Aligner is free to download, with no in-app purchases.

### Do Bubble Level or 4Wheel Aligner have ads?

Bubble Level shows ads; 4Wheel Aligner does not.

### Which is updated more often, Bubble Level or 4Wheel Aligner?

Bubble Level ships an update weekly, and 4Wheel Aligner every 6 months. Most recently, Bubble Level was updated on October 17, 2026 and 4Wheel Aligner on September 19, 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.*