# Angle Gradient Inclinometer vs SpinopelvicMobilityApp

The clearest difference is price: Angle Gradient Inclinometer at Free against SpinopelvicMobilityApp's $9.99. Angle Gradient Inclinometer also leads on iOS requirement (13 vs 15.6). SpinopelvicMobilityApp's advantage is ads (none vs shown) and device support (4 vs 2). On update cadence and in-app purchases there is nothing between them.

Angle Gradient Inclinometer is free to download; SpinopelvicMobilityApp costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Angle Gradient Inclinometer ships an update every 8 months, SpinopelvicMobilityApp every 10 months. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Angle Gradient Inclinometer | SpinopelvicMobilityApp |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.4 (295 ratings)](https://appshunter.io/ios/app/angle-gradient-inclinometer/id530077112/reviews)** | — |
| Number of ratings | **295** | — |
| Positive reviews | 51.1% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 8 months** | Every 10 months |
| Monetization | Ad-supported | — |
| Size | 11 MB | 1 MB |
| Requires iOS | **13** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 17+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [ORTHOPRACTIS.COM SINGLE MEMBER P.C.](https://appshunter.io/developer/1286360877) |

## 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


### SpinopelvicMobilityApp

[App page](https://appshunter.io/ios/app/spinopelvicmobilityapp/id1369972895)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Angle Gradient Inclinometer free?

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

### Is SpinopelvicMobilityApp free?

SpinopelvicMobilityApp costs $9.99, with no in-app purchases.

### Do Angle Gradient Inclinometer or SpinopelvicMobilityApp have ads?

Angle Gradient Inclinometer shows ads; SpinopelvicMobilityApp does not.

### Which is updated more often, Angle Gradient Inclinometer or SpinopelvicMobilityApp?

Angle Gradient Inclinometer ships an update every 8 months, and SpinopelvicMobilityApp every 10 months. Most recently, Angle Gradient Inclinometer was updated on October 10, 2026 and SpinopelvicMobilityApp on October 7, 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.*