# Tri vs Flat Pattern Bend Calculator

The clearest difference is review sentiment: Tri at 100% against Flat Pattern Bend Calculator's 45%. Tri also leads on in-app purchases (none vs 6) and rating (5.0 vs 4.6). Flat Pattern Bend Calculator's advantage is update cadence (every 2 months vs every 12 months) and ratings volume (151 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Flat Pattern Bend Calculator sells 6 in-app purchases, starting at $4.99 per 7 days. Tri asks for nothing beyond the download.

Tri holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Flat Pattern Bend Calculator has 151 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Tri's written reviews are positive against 45% of Flat Pattern Bend Calculator's.

Tri ships an update every 12 months, Flat Pattern Bend Calculator every 2 months. The most recent releases landed on September 16, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Tri | Flat Pattern Bend Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tri-func/id496807268/reviews)** | [4.6 (151 ratings)](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922/reviews) |
| Number of ratings | 1 | **151** |
| Positive reviews | **100.0% of reviews** | 45.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 12 months | **Every 2 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 4 MB | 61 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Thirdware.jp](https://appshunter.io/developer/464228680) | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) |

## What reviewers say

### Tri

[App page](https://appshunter.io/ios/app/tri-func/id496807268)

This utility app provides the formula and value for calculating triangle properties. It's designed for quick access to mathematical formulas related to triangles.

**Highlights:** Triangle formula display, Value calculation, Quick access utility, Mathematical formulas

**Features:** Vision Pro support

**In-app purchases:** none


### Flat Pattern Bend Calculator

[App page](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922)

This app provides accurate flat pattern layouts for complex sheet metal shapes and transitions. It simplifies calculations for cones, frustums, cylinders, and various transition pieces, saving time and reducing errors in fabrication projects.

**Highlights:** Cone calculations, Frustum calculations, Truncated cylinder layouts, Bend allowance calculations, Transition piece generation, Complex shape patterns

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| MONTHLY UNLOCK | $6.99 | per month |
| Offer : Yearly Access | $29.99 | per year |
| Yearly Access | $39.99 | per year |
| YEARLY UNLOCK | $39.99 | per year |
| LIFETIME UNLOCK | $69.99 | one-time |


## Frequently asked questions

### Is Tri free?

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

### Is Flat Pattern Bend Calculator free?

Flat Pattern Bend Calculator is free to download, with in-app purchases available.

### Which has better reviews, Tri or Flat Pattern Bend Calculator?

Tri is rated higher. Tri averages 5.0 out of 5 from 1 ratings, while Flat Pattern Bend Calculator averages 4.6 from 151 ratings.

### Do Tri or Flat Pattern Bend Calculator have ads?

Both Tri and Flat Pattern Bend Calculator show ads.

### Which is updated more often, Tri or Flat Pattern Bend Calculator?

Tri ships an update every 12 months, and Flat Pattern Bend Calculator every 2 months. Most recently, Tri was updated on September 16, 2026 and Flat Pattern Bend Calculator on September 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.*