# 37Express Driver vs Bubble Level Go

The clearest difference is in-app purchases: 37Express Driver at none against Bubble Level Go's 1. 37Express Driver also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 4 months). On price and device support there is nothing between them.

Both are free to download. Bubble Level Go sells 1 in-app purchase, starting at $9.99 per 7 days. 37Express Driver asks for nothing beyond the download.

37Express Driver ships an update every 3 weeks, Bubble Level Go every 4 months. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 37Express Driver | Bubble Level Go |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Size | 39 MB | 34 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [37 EXPRESS](https://appshunter.io/developer/1441274345) | [Blazing App Studio](https://appshunter.io/developer/1787017244) |

## What reviewers say

### 37Express Driver

[App page](https://appshunter.io/ios/app/37express-driver/id1470910796)

**Features:** macOS Compatibility

**In-app purchases:** none


### Bubble Level Go

[App page](https://appshunter.io/ios/app/bubble-level-go/id6755139090)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-free Experience — Weekly | $9.99 | per 7 days |


## Frequently asked questions

### Is 37Express Driver free?

37Express Driver is free to download, with no in-app purchases.

### Is Bubble Level Go free?

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

### Do 37Express Driver or Bubble Level Go have ads?

Bubble Level Go shows ads; 37Express Driver does not.

### Which is updated more often, 37Express Driver or Bubble Level Go?

37Express Driver ships an update every 3 weeks, and Bubble Level Go every 4 months. Most recently, 37Express Driver was updated on October 4, 2026 and Bubble Level Go on October 9, 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.*