# Triangle Simulator vs Flm∴S アイソメmaster

The clearest difference is review sentiment: Triangle Simulator at 100% against Flm∴S アイソメmaster's 0%. Flm∴S アイソメmaster's advantage is ads (none vs shown) and update cadence (fortnightly vs every 2 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Triangle Simulator sells 1 in-app purchase, starting at $1.99 per month and Flm∴S アイソメmaster sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Triangle Simulator ships an update every 2 months, Flm∴S アイソメmaster fortnightly. The most recent releases landed on November 3, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | Triangle Simulator | Flm∴S アイソメmaster |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 65 MB | 43 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Toshiya Hondo](https://appshunter.io/developer/1571875732) | [shinji miyagawa](https://appshunter.io/developer/6791523364) |

## What reviewers say

### Triangle Simulator

[App page](https://appshunter.io/ios/app/triangle-simulator/id1583116107)

Calculate triangle properties like sides, angles, and area instantly. Save and review past calculations with added memos. Supports various input formats and angle units for precise results.

**Highlights:** Calculate triangle sides, angles, and area, View triangle image, Save calculation history, Add memos to calculations, Input sides in square rooted values, Adjust result digit count, Choose angle units

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads (Monthly) | $1.99 | per month |


### Flm∴S アイソメmaster

[App page](https://appshunter.io/ios/app/flms-master/id6791523361)

This app streamlines the creation of piping isometric drawings for construction and fabrication sites. It allows users to draw piping lines, automatically add fittings, and calculate cut lengths, replacing manual drafting and complex CAD software with a tablet interface.

**Highlights:** Draw piping lines with finger or pen, Automatic fitting placement (elbows, tees), Calculates cut lengths based on JIS standards, 3D preview of drawings, Export drawings to PDF, Share drawing files with others

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月額サブスクリプション | $3.99 | per month |
| 全機能アンロック（買い切り） | $19.99 | one-time |


## Frequently asked questions

### Is Triangle Simulator free?

Triangle Simulator is free to download, with in-app purchases available.

### Is Flm∴S アイソメmaster free?

Flm∴S アイソメmaster is free to download, with in-app purchases available.

### Do Triangle Simulator or Flm∴S アイソメmaster have ads?

Triangle Simulator shows ads; Flm∴S アイソメmaster does not.

### Which is updated more often, Triangle Simulator or Flm∴S アイソメmaster?

Triangle Simulator ships an update every 2 months, and Flm∴S アイソメmaster fortnightly. Most recently, Triangle Simulator was updated on November 3, 2026 and Flm∴S アイソメmaster on November 13, 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.*