# Tri vs Sheet Metal Calculator

The clearest difference is review sentiment: Tri at 100% against Sheet Metal Calculator's 0%. Tri also leads on rating (5.0 vs 1.4) and in-app purchases (none vs 3). Sheet Metal Calculator's advantage is ads (none vs shown) and update cadence (every 4 months vs every 12 months). On price and device support there is nothing between them.

Both are free to download. Sheet Metal Calculator sells 3 in-app purchases, starting at $3.99 per 7 days. Tri asks for nothing beyond the download.

Tri holds the better App Store score, 5.0 against 1.4. That said, the two scores are not equally well evidenced: Sheet Metal Calculator has 9 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 0% of Sheet Metal Calculator's.

Tri ships an update every 12 months, Sheet Metal Calculator every 4 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Tri | Sheet Metal Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tri-func/id496807268/reviews)** | [1.4 (9 ratings)](https://appshunter.io/ios/app/sheet-metal-calculator/id6469767934/reviews) |
| Number of ratings | 1 | **9** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 4 months** |
| Monetization | **Ad-supported** | Paid |
| Size | 4 MB | 39 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Thirdware.jp](https://appshunter.io/developer/464228680) | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) |

## 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


### Sheet Metal Calculator

[App page](https://appshunter.io/ios/app/sheet-metal-calculator/id6469767934)

This app simplifies sheet metal calculations for professionals and DIYers. It helps determine material thickness, size, weight, bend allowances, and cut lengths. Features include material selection, unit conversions, and geometric shape calculations.

**Highlights:** Material selection database, Thickness and size calculations, Accurate weight estimations, Bend allowance and K-factor calculation, Cut length and offcut optimization, Unit conversion tools, Geometric shape calculations

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Monthly | $8.99 | per month |
| Yearly | $17.99 | per year |


## Frequently asked questions

### Is Tri free?

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

### Is Sheet Metal Calculator free?

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

### Which has better reviews, Tri or Sheet Metal Calculator?

Tri is rated higher. Tri averages 5.0 out of 5 from 1 ratings, while Sheet Metal Calculator averages 1.4 from 9 ratings.

### Do Tri or Sheet Metal Calculator have ads?

Tri shows ads; Sheet Metal Calculator does not.

### Which is updated more often, Tri or Sheet Metal Calculator?

Tri ships an update every 12 months, and Sheet Metal Calculator every 4 months. Most recently, Tri was updated on October 20, 2026 and Sheet Metal Calculator 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.*