# Triangle3 vs Verify Calculator

The clearest difference is price: Verify Calculator at Free against Triangle3's $3.99. Triangle3's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

Verify Calculator is free to download; Triangle3 costs $3.99 up front. Verify Calculator sells 1 one-off in-app purchase. Triangle3 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on September 13, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Triangle3 | Verify Calculator |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Monetization | Paid | — |
| Size | 7 MB | 15 MB |
| Requires iOS | **15.0** | 15.4 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ryo sasaki](https://appshunter.io/developer/318552526) | [hiroshi mizuno](https://appshunter.io/developer/1742325047) |

## 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


### Verify Calculator

[App page](https://appshunter.io/ios/app/verify-calculator/id6499068707)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $5.99 | one-time |


## Frequently asked questions

### Is Triangle3 free?

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

### Is Verify Calculator free?

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

### Do Triangle3 or Verify Calculator have ads?

Verify Calculator shows ads; Triangle3 does not.

### Which is updated more often, Triangle3 or Verify Calculator?

Triangle3 ships an update every 5 weeks, and Verify Calculator every 5 weeks. Most recently, Triangle3 was updated on September 13, 2026 and Verify Calculator on September 20, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*