# Triangle3 vs Flm∴S アイソメmaster

The clearest difference is price: Flm∴S アイソメmaster at Free against Triangle3's $3.99. Flm∴S アイソメmaster also leads on update cadence (every 2 days vs every 5 weeks). Triangle3's advantage is review sentiment (40% vs 0%). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Flm∴S アイソメmaster is free to download; Triangle3 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Triangle3 ships an update every 5 weeks, Flm∴S アイソメmaster every 2 days. The most recent releases landed on October 12, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Triangle3 | Flm∴S アイソメmaster |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | **40.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Monetization | Paid | **Free** |
| Size | 7 MB | 39 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ryo sasaki](https://appshunter.io/developer/318552526) | [shinji miyagawa](https://appshunter.io/developer/6791523364) |

## What reviewers say

### Triangle3

[App page](https://appshunter.io/ios/app/triangle3/id1643788233)

This app provides advanced calculation tools for field work, specializing in right and unequal triangles. It supports complex shapes like cones, pipes, and screw wings, with AR visualization for floor plans. It also includes standard calculator functions and memory features.

**Highlights:** Right and unequal triangle calculations, Complex shape development (cones, pipes, etc.), Augmented Reality (AR) floor plan visualization, Standard calculator functions with memory, Trigonometric and cosine theorem calculations, PCD and screw wing calculations

**Features:** Vision Pro support

**In-app purchases:** none


### Flm∴S アイソメmaster

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

This app simplifies the creation of piping isometric drawings (spool drawings) for construction and fabrication sites. It replaces manual drafting and CAD software with a tablet-based tool, allowing users to easily place symbols and automatically calculate dimensions for efficient workflow.

**Highlights:** Piping and fitting symbols, Automatic cut length calculation, Part numbering and material lists, Vector PDF output for site use, Underlay image support, Project saving and sharing

**In-app purchases:** none


## Frequently asked questions

### Is Triangle3 free?

Triangle3 costs $3.99, with no in-app purchases.

### Is Flm∴S アイソメmaster free?

Flm∴S アイソメmaster is free to download, with no in-app purchases.

### Do Triangle3 or Flm∴S アイソメmaster have ads?

Neither Triangle3 nor Flm∴S アイソメmaster shows ads.

### Which is updated more often, Triangle3 or Flm∴S アイソメmaster?

Triangle3 ships an update every 5 weeks, and Flm∴S アイソメmaster every 2 days. Most recently, Triangle3 was updated on October 12, 2026 and Flm∴S アイソメmaster on September 22, 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.*