# Unit Circle Calculator vs Smart lecture ebook

The clearest difference is update cadence: Smart lecture ebook at daily against Unit Circle Calculator's every 3 weeks. Smart lecture ebook also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Unit Circle Calculator sells 8 one-off in-app purchases and Smart lecture ebook sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Unit Circle Calculator ships an update every 3 weeks, Smart lecture ebook daily. The most recent releases landed on November 12, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Unit Circle Calculator | Smart lecture ebook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (8 ratings)](https://appshunter.io/ios/app/unit-circle-calculator/id1606376248/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 182 MB | 121 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) | [SHINKOSHUPPANSHA KEIRINKAN Co.,Ltd](https://appshunter.io/developer/867388569) |

## What reviewers say

### Unit Circle Calculator

[App page](https://appshunter.io/ios/app/unit-circle-calculator/id1606376248)

Visualize and understand the unit circle with step-by-step calculations, diagrams, and animations. Supports various input formats and saves your work in a history for easy access and sharing.

**Highlights:** Unit circle visualization, Step-by-step calculation explanations, Diagrams and animations, Supports negative, decimal, fraction, and π inputs, Calculation history, Shareable solutions

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $1.99 | one-time |
| Lifetime Access | $1.99 | one-time |


### Smart lecture ebook

[App page](https://appshunter.io/ios/app/smart-lecture-ebook/id1664335223)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JAPANESE MATH SmartLacture10 | $8.99 | one-time |


## Frequently asked questions

### Is Unit Circle Calculator free?

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

### Is Smart lecture ebook free?

Smart lecture ebook is free to download, with in-app purchases available.

### Do Unit Circle Calculator or Smart lecture ebook have ads?

Neither Unit Circle Calculator nor Smart lecture ebook shows ads.

### Which is updated more often, Unit Circle Calculator or Smart lecture ebook?

Unit Circle Calculator ships an update every 3 weeks, and Smart lecture ebook daily. Most recently, Unit Circle Calculator was updated on November 12, 2026 and Smart lecture ebook on November 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.*