# Bubble Level vs Slope Level RX

The clearest difference is price: Bubble Level at Free against Slope Level RX's $8.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Bubble Level is free to download; Slope Level RX costs $8.99 up front. Bubble Level sells 3 in-app purchases, starting at $4.99 per 7 days and Slope Level RX sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Bubble Level | Slope Level RX |
| --- | --- | --- |
| Price | **Free** | $8.99 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 5 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Phuc Pham](https://appshunter.io/developer/1893081423) | [浩东 许](https://appshunter.io/developer/1834069800) |

## What reviewers say

### Bubble Level

[App page](https://appshunter.io/ios/app/bubble-level-spirit-level/id6772263236)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Surface Check — Weekly | $4.99 | per 7 days |
| Shelf Alignment — Yearly | $24.99 | per year |
| Slope Gauge — Pay Once | $49.99 | one-time |


### Slope Level RX

[App page](https://appshunter.io/ios/app/slope-level-rx/id6772923336)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Membership | $2.99 | one-time |


## Frequently asked questions

### Is Bubble Level free?

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

### Is Slope Level RX free?

Slope Level RX costs $8.99, and also offers in-app purchases.

### Do Bubble Level or Slope Level RX have ads?

Neither Bubble Level nor Slope Level RX shows ads.

### Which is updated more often, Bubble Level or Slope Level RX?

Bubble Level ships an update every 3 weeks, and Slope Level RX every 3 weeks. Most recently, Bubble Level was updated on October 28, 2026 and Slope Level RX 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.*