# Unit Circle Practice vs AmboPortal

The clearest difference is in-app purchases: AmboPortal at none against Unit Circle Practice's 1. AmboPortal also leads on update cadence (weekly vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Unit Circle Practice sells 1 one-off in-app purchase. AmboPortal asks for nothing beyond the download.

Unit Circle Practice ships an update every 6 months, AmboPortal weekly. The most recent releases landed on September 18, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Unit Circle Practice | AmboPortal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (20 ratings)](https://appshunter.io/ios/app/unit-circle-practice/id1506653412/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 39 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Russell Thorman](https://appshunter.io/developer/1093341902) | [SKYLER ANTHONY STEVENS](https://appshunter.io/developer/1887747637) |

## What reviewers say

### Unit Circle Practice

[App page](https://appshunter.io/ios/app/unit-circle-practice/id1506653412)

Master the unit circle with focused training on angles, radians, coordinates, and exact trig values. Interactive exercises and quizzes build speed and accuracy for pre-calculus and trigonometry students. Unlock advanced tools for deeper understanding and test preparation.

**Highlights:** Interactive drag-and-drop training, Unit circle and exact value quizzes, Clean unit circle guide with summaries, Inverse trig and angle conversion practice, Quadrant sign identification

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime Unlock | $1.99 | one-time |


### AmboPortal

[App page](https://appshunter.io/ios/app/amboportal/id6761090244)

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

**In-app purchases:** none


## Frequently asked questions

### Is Unit Circle Practice free?

Unit Circle Practice is free to download, with in-app purchases available.

### Is AmboPortal free?

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

### Do Unit Circle Practice or AmboPortal have ads?

Neither Unit Circle Practice nor AmboPortal shows ads.

### Which is updated more often, Unit Circle Practice or AmboPortal?

Unit Circle Practice ships an update every 6 months, and AmboPortal weekly. Most recently, Unit Circle Practice was updated on September 18, 2026 and AmboPortal on September 13, 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.*