# フルタニランバー vs Triangle Simulator

The clearest difference is in-app purchases: フルタニランバー at none against Triangle Simulator's 1. フルタニランバー also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Triangle Simulator's advantage is update cadence (every 2 months vs every 4 months). On price 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. フルタニランバー asks for nothing beyond the download.

フルタニランバー ships an update every 4 months, Triangle Simulator every 2 months. The most recent releases landed on September 18, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | フルタニランバー | Triangle Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 33 MB | 65 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [iPublishing Co., Ltd.](https://appshunter.io/developer/501620545) | [Toshiya Hondo](https://appshunter.io/developer/1571875732) |

## What reviewers say

### フルタニランバー

[App page](https://appshunter.io/ios/app/id1502501394)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is フルタニランバー free?

フルタニランバー is free to download, with no in-app purchases.

### Is Triangle Simulator free?

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

### Do フルタニランバー or Triangle Simulator have ads?

Triangle Simulator shows ads; フルタニランバー does not.

### Which is updated more often, フルタニランバー or Triangle Simulator?

フルタニランバー ships an update every 4 months, and Triangle Simulator every 2 months. Most recently, フルタニランバー was updated on September 18, 2026 and Triangle Simulator on September 25, 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.*