# Triangle3 vs BijaVault

The clearest difference is price: BijaVault at Free against Triangle3's $3.99. BijaVault also leads on update cadence (every 3 days vs every 5 weeks). Triangle3's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support there is nothing between them.

BijaVault is free to download; Triangle3 costs $3.99 up front. BijaVault sells 2 in-app purchases, starting at $4.99 per month. Triangle3 asks for nothing beyond the download.

Triangle3 ships an update every 5 weeks, BijaVault every 3 days. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Triangle3 | BijaVault |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Monetization | Paid | — |
| Size | 7 MB | 26 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ryo sasaki](https://appshunter.io/developer/318552526) | [TRADE CENTER, K.K.](https://appshunter.io/developer/6809109039) |

## What reviewers say

### Triangle3

[App page](https://appshunter.io/ios/app/triangle3/id1643788233)

This app provides advanced calculation tools for field work, specializing in right and unequal triangles. It supports complex shapes like cones, pipes, and screw wings, with AR visualization for floor plans. It also includes standard calculator functions and memory features.

**Highlights:** Right and unequal triangle calculations, Complex shape development (cones, pipes, etc.), Augmented Reality (AR) floor plan visualization, Standard calculator functions with memory, Trigonometric and cosine theorem calculations, PCD and screw wing calculations

**Features:** Vision Pro support

**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 Triangle3 free?

Triangle3 costs $3.99, with no in-app purchases.

### Is BijaVault free?

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

### Do Triangle3 or BijaVault have ads?

BijaVault shows ads; Triangle3 does not.

### Which is updated more often, Triangle3 or BijaVault?

Triangle3 ships an update every 5 weeks, and BijaVault every 3 days. Most recently, Triangle3 was updated on October 30, 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.*