# Angle Gradient Inclinometer vs Bubble Level®

The clearest difference is in-app purchases: Angle Gradient Inclinometer at none against Bubble Level®'s 1. Angle Gradient Inclinometer also leads on review sentiment (51% vs 33%) and ratings volume (295 vs 84). Bubble Level®'s advantage is iOS requirement (11.0 vs 13). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Bubble Level® sells 1 one-off in-app purchase. Angle Gradient Inclinometer asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.4 for Angle Gradient Inclinometer against 4.4 for Bubble Level®. Both are backed by a comparable volume of ratings — 295 and 84 respectively. Written reviews are what separate them: 51% of Angle Gradient Inclinometer's written reviews are positive against 33% of Bubble Level®'s.

Angle Gradient Inclinometer ships an update every 8 months, Bubble Level® every 11 months. The most recent releases landed on October 10, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Angle Gradient Inclinometer | Bubble Level® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (295 ratings)](https://appshunter.io/ios/app/angle-gradient-inclinometer/id530077112/reviews) | [4.4 (84 ratings)](https://appshunter.io/ios/app/bubble-level/id1538962423/reviews) |
| Number of ratings | **295** | 84 |
| Positive reviews | **51.1% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 8 months** | Every 11 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 11 MB | 48 MB |
| Requires iOS | 13 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Tripti Kumari](https://appshunter.io/developer/1523421832) |

## What reviewers say

### Angle Gradient Inclinometer

[App page](https://appshunter.io/ios/app/angle-gradient-inclinometer/id530077112)

Easily measure tilt angles with this free protractor app. It displays inclination from 0 to 359 degrees, along with gradient percentages and angles summing to 180 or 360 degrees. Switch to theodolite mode to set a specified angle to zero.

**Highlights:** Measure tilt angles 0-359 degrees, Display gradient percentage, Show sum angles (180/360), Theodolite mode, Set specified angle to zero

**Features:** Vision Pro support

**In-app purchases:** none


### Bubble Level®

[App page](https://appshunter.io/ios/app/bubble-level/id1538962423)

This app provides a digital bubble level with multiple viewing options for precise measurements. It can be used for surface leveling, angle measurement, and checking flatness, offering versatile utility for various tasks.

**Highlights:** Surface level viewing, Portrait and landscape orientation, Angle and slope measurement in percentage, Carpenter's level functionality, Surface flatness check, Line level, Compass

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is Angle Gradient Inclinometer free?

Angle Gradient Inclinometer is free to download, with no in-app purchases.

### Is Bubble Level® free?

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

### Which has better reviews, Angle Gradient Inclinometer or Bubble Level®?

Angle Gradient Inclinometer and Bubble Level® are both rated 4.4 out of 5 on the App Store, from 295 and 84 ratings respectively.

### Do Angle Gradient Inclinometer or Bubble Level® have ads?

Both Angle Gradient Inclinometer and Bubble Level® show ads.

### Which is updated more often, Angle Gradient Inclinometer or Bubble Level®?

Angle Gradient Inclinometer ships an update every 8 months, and Bubble Level® every 11 months. Most recently, Angle Gradient Inclinometer was updated on October 10, 2026 and Bubble Level® on October 1, 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.*