# Trigonometric Calculation vs BijaVault

The clearest difference is in-app purchases: Trigonometric Calculation at none against BijaVault's 2. Trigonometric Calculation also leads on iOS requirement (15.5 vs 17.0). BijaVault's advantage is update cadence (every 3 days vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. BijaVault sells 2 in-app purchases, starting at $4.99 per month. Trigonometric Calculation asks for nothing beyond the download.

Trigonometric Calculation ships an update every 6 weeks, BijaVault every 3 days. The most recent releases landed on October 13, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Trigonometric Calculation | BijaVault |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Size | 5 MB | 26 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Risako Asai](https://appshunter.io/developer/1671273580) | [TRADE CENTER, K.K.](https://appshunter.io/developer/6809109039) |

## What reviewers say

### Trigonometric Calculation

[App page](https://appshunter.io/ios/app/trigonometric-calculation/id1636196284)

**Features:** macOS Compatibility

**In-app purchases:** none


### BijaVault

[App page](https://appshunter.io/ios/app/bijavault-markdown-notes/id6809109037)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BijaVault Pro Monthly | $4.99 | per month |
| BijaVault Pro Yearly | $47.99 | per year |


## Frequently asked questions

### Is Trigonometric Calculation free?

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

### Is BijaVault free?

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

### Do Trigonometric Calculation or BijaVault have ads?

Both Trigonometric Calculation and BijaVault show ads.

### Which is updated more often, Trigonometric Calculation or BijaVault?

Trigonometric Calculation ships an update every 6 weeks, and BijaVault every 3 days. Most recently, Trigonometric Calculation was updated on October 13, 2026 and BijaVault on October 24, 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.*