# Flat Pattern Bend Calculator vs CalcTri V1

The clearest difference is review sentiment: CalcTri V1 at 100% against Flat Pattern Bend Calculator's 45%. CalcTri V1 also leads on in-app purchases (none vs 6). Flat Pattern Bend Calculator's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, update cadence and ads 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. CalcTri V1 asks for nothing beyond the download.

Flat Pattern Bend Calculator ships an update every 2 months, CalcTri V1 every 5 weeks. The most recent releases landed on September 24, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Flat Pattern Bend Calculator | CalcTri V1 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (151 ratings)](https://appshunter.io/ios/app/flat-pattern-bend-calculator/id1361485922/reviews)** | — |
| Number of ratings | **151** | — |
| Positive reviews | 45.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 61 MB | 40 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) | [TOGUCHI, CO., LTD.](https://appshunter.io/developer/668415384) |

## What reviewers say

### 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 |


### CalcTri V1

[App page](https://appshunter.io/ios/app/calctri-v1/id1606476734)

This utility app offers a calculator, right triangle calculations, and pipe centering. It mimics desktop calculator operation and allows copying from history. Supports angle input in degrees and minutes for precise calculations.

**Highlights:** Basic calculator function, Right triangle calculations, Pipe centering calculations, Angle input in degrees and minutes, Copy calculation history

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Flat Pattern Bend Calculator free?

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

### Is CalcTri V1 free?

CalcTri V1 is free to download, with no in-app purchases.

### Do Flat Pattern Bend Calculator or CalcTri V1 have ads?

Both Flat Pattern Bend Calculator and CalcTri V1 show ads.

### Which is updated more often, Flat Pattern Bend Calculator or CalcTri V1?

Flat Pattern Bend Calculator ships an update every 2 months, and CalcTri V1 every 5 weeks. Most recently, Flat Pattern Bend Calculator was updated on September 24, 2026 and CalcTri V1 on September 25, 2026.

---

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