# Tri vs Elbow Calculator

The clearest difference is in-app purchases: Tri at none against Elbow Calculator's 1. Elbow Calculator's advantage is ads (none vs shown) and update cadence (every 5 months vs every 12 months). On price and device support there is nothing between them.

Both are free to download. Elbow Calculator sells 1 one-off in-app purchase. Tri asks for nothing beyond the download.

Tri ships an update every 12 months, Elbow Calculator every 5 months. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Tri | Elbow Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tri-func/id496807268/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 5 months** |
| Monetization | Ad-supported | — |
| Size | 4 MB | 57 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) | [Shital Gorasiya](https://appshunter.io/developer/1737199158) |

## 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


### Elbow Calculator

[App page](https://appshunter.io/ios/app/elbow-calculator/id6753001992)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Purchase | $5.99 | one-time |


## Frequently asked questions

### Is Tri free?

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

### Is Elbow Calculator free?

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

### Do Tri or Elbow Calculator have ads?

Tri shows ads; Elbow Calculator does not.

### Which is updated more often, Tri or Elbow Calculator?

Tri ships an update every 12 months, and Elbow Calculator every 5 months. Most recently, Tri was updated on October 3, 2026 and Elbow Calculator on October 12, 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.*