# Trigr vs FabCost Sheet Calculator

The clearest difference is price: FabCost Sheet Calculator at Free against Trigr's $1.99. Trigr's advantage is update cadence (daily vs every 6 months) and iOS requirement (16.1 vs 18.2). On ads, in-app purchases and device support there is nothing between them.

FabCost Sheet Calculator is free to download; Trigr costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Trigr ships an update daily, FabCost Sheet Calculator every 6 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Trigr | FabCost Sheet Calculator |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/trigr-trigonometry-solver/id6448587882/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 6 months |
| Monetization | Paid | — |
| Size | 66 MB | 3 MB |
| Requires iOS | **16.1** | 18.2 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Evolv Developments Pty. Ltd.](https://appshunter.io/developer/1679865917) | [Codakin LLC](https://appshunter.io/developer/1838211463) |

## What reviewers say

### Trigr

[App page](https://appshunter.io/ios/app/trigr-trigonometry-solver/id6448587882)

This app quickly solves for all unknown measurements of right-angle and isosceles triangles using just two known values. It's designed for students, engineers, and builders needing accurate triangle calculations.

**Highlights:** Solves right-angle and isosceles triangles, Calculates all unknown measurements, Requires only two known values, User-friendly interface, Accurate calculations

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

**In-app purchases:** none


### FabCost Sheet Calculator

[App page](https://appshunter.io/ios/app/fabcost-sheet-calculator/id6752208592)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Trigr free?

Trigr costs $1.99, with no in-app purchases.

### Is FabCost Sheet Calculator free?

FabCost Sheet Calculator is free to download, with no in-app purchases.

### Do Trigr or FabCost Sheet Calculator have ads?

Neither Trigr nor FabCost Sheet Calculator shows ads.

### Which is updated more often, Trigr or FabCost Sheet Calculator?

Trigr ships an update daily, and FabCost Sheet Calculator every 6 months. Most recently, Trigr was updated on November 3, 2026 and FabCost Sheet Calculator on October 30, 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.*