# Trigr vs Flange Hole Marker Calculator

The clearest difference is update cadence: Trigr at daily against Flange Hole Marker Calculator's every 11 months. Trigr also leads on price ($1.99 vs $3.99). Flange Hole Marker Calculator's advantage is iOS requirement (13.0 vs 16.1). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Trigr costs $1.99 and Flange Hole Marker Calculator $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Trigr against 5.0 for Flange Hole Marker Calculator. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Trigr ships an update daily, Flange Hole Marker Calculator every 11 months. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Trigr | Flange Hole Marker Calculator |
| --- | --- | --- |
| Price | **$1.99** | $3.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/trigr-trigonometry-solver/id6448587882/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/flange-hole-marker-calculator/id6471257596/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 11 months |
| Monetization | Paid | Paid |
| Size | 66 MB | 30 MB |
| Requires iOS | 16.1 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Evolv Developments Pty. Ltd.](https://appshunter.io/developer/1679865917) | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) |

## 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


### Flange Hole Marker Calculator

[App page](https://appshunter.io/ios/app/flange-hole-marker-calculator/id6471257596)

This engineering tool accurately calculates and marks bolt hole positions on flanges for machinists and fabricators. It offers features for equispaced, angle-based, and equivalent hole counts, saving time and reducing manual errors in workshop settings.

**Highlights:** Equispaced flange hole marking, Angle-based hole layout, Equivalent number of holes calculation, Accurate and reliable results, Simple interface, Reduces layout time

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

**In-app purchases:** none


## Frequently asked questions

### Is Trigr free?

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

### Is Flange Hole Marker Calculator free?

Flange Hole Marker Calculator costs $3.99, with no in-app purchases.

### Which has better reviews, Trigr or Flange Hole Marker Calculator?

Trigr and Flange Hole Marker Calculator are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Trigr or Flange Hole Marker Calculator have ads?

Neither Trigr nor Flange Hole Marker Calculator shows ads.

### Which is updated more often, Trigr or Flange Hole Marker Calculator?

Trigr ships an update daily, and Flange Hole Marker Calculator every 11 months. Most recently, Trigr was updated on October 24, 2026 and Flange Hole Marker Calculator on October 17, 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.*