# Angle Gradient Inclinometer vs TailgateFA

The clearest difference is ads: TailgateFA at none against Angle Gradient Inclinometer's shown. TailgateFA also leads on update cadence (daily vs every 8 months). Angle Gradient Inclinometer's advantage is iOS requirement (13 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Angle Gradient Inclinometer ships an update every 8 months, TailgateFA daily. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Angle Gradient Inclinometer | TailgateFA |
| --- | --- | --- |
| Price | Free | Free |
| 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 | **Daily** |
| Monetization | Ad-supported | — |
| Size | 11 MB | 3 MB |
| Requires iOS | **13** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Peter Marcotte](https://appshunter.io/developer/1895246220) |

## 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


### TailgateFA

[App page](https://appshunter.io/ios/app/tailgatefa/id6763282490)

**Features:** macOS Compatibility

**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 TailgateFA free?

TailgateFA is free to download, with no in-app purchases.

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

Angle Gradient Inclinometer shows ads; TailgateFA does not.

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

Angle Gradient Inclinometer ships an update every 8 months, and TailgateFA daily. Most recently, Angle Gradient Inclinometer was updated on October 14, 2026 and TailgateFA on October 8, 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.*