# Trigonometry Calculator. vs SmartID Tag

The clearest difference is in-app purchases: SmartID Tag at none against Trigonometry Calculator.'s 2. SmartID Tag also leads on ads (none vs shown) and update cadence (every 2 days vs every 2 weeks). Trigonometry Calculator.'s advantage is device support (3 vs 1). On price and iOS requirement there is nothing between them.

Both are free to download. Trigonometry Calculator. sells 2 in-app purchases, starting at $2.99 per month. SmartID Tag asks for nothing beyond the download.

Trigonometry Calculator. ships an update every 2 weeks, SmartID Tag every 2 days. The most recent releases landed on November 8, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Trigonometry Calculator. | SmartID Tag |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (20 ratings)](https://appshunter.io/ios/app/trigonometry-calculator/id6741517618/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 64 MB | 59 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Horitech](https://appshunter.io/developer/1794537335) | [Genci Yusifov](https://appshunter.io/developer/6800261174) |

## What reviewers say

### Trigonometry Calculator.

[App page](https://appshunter.io/ios/app/trigonometry-calculator/id6741517618)

This app calculates key values for right-angled and scalene triangles with high precision. It offers a user-friendly interface, flexible angle units, and includes a reference guide to trigonometric formulas. A subscription unlocks calculation steps and removes ads.

**Highlights:** Right-angled & scalene triangle support, Formula reference guide, Accurate side, angle, and area calculations, High precision to 14 decimal places, Flexible angle units (degrees/radians), User-friendly interface

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Annual | $24.99 | per year |


### SmartID Tag

[App page](https://appshunter.io/ios/app/smartid-tag/id6800261172)

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

**In-app purchases:** none


## Frequently asked questions

### Is Trigonometry Calculator. free?

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

### Is SmartID Tag free?

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

### Do Trigonometry Calculator. or SmartID Tag have ads?

Trigonometry Calculator. shows ads; SmartID Tag does not.

### Which is updated more often, Trigonometry Calculator. or SmartID Tag?

Trigonometry Calculator. ships an update every 2 weeks, and SmartID Tag every 2 days. Most recently, Trigonometry Calculator. was updated on November 8, 2026 and SmartID Tag on November 10, 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.*