# SSFMfree vs Triangle3

The clearest difference is price: SSFMfree at Free against Triangle3's $3.99. Triangle3's advantage is ads (none vs shown) and update cadence (every 5 weeks vs every 11 months). On in-app purchases, device support and iOS requirement there is nothing between them.

SSFMfree is free to download; Triangle3 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SSFMfree ships an update every 11 months, Triangle3 every 5 weeks. The most recent releases landed on September 26, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | SSFMfree | Triangle3 |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 11 months | **Every 5 weeks** |
| Monetization | — | Paid |
| Size | 11 MB | 7 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [sigeyosi kanenishi](https://appshunter.io/developer/629958778) | [ryo sasaki](https://appshunter.io/developer/318552526) |

## What reviewers say

### SSFMfree

[App page](https://appshunter.io/ios/app/ssfmfree/id1476228180)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is SSFMfree free?

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

### Is Triangle3 free?

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

### Do SSFMfree or Triangle3 have ads?

SSFMfree shows ads; Triangle3 does not.

### Which is updated more often, SSFMfree or Triangle3?

SSFMfree ships an update every 11 months, and Triangle3 every 5 weeks. Most recently, SSFMfree was updated on September 26, 2026 and Triangle3 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.*