# 山形工房 けん玉 大空 OZORA KENDAMA vs STEM Line Builder

The clearest difference is iOS requirement: 山形工房 けん玉 大空 OZORA KENDAMA at 11.0 against STEM Line Builder's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

山形工房 けん玉 大空 OZORA KENDAMA ships an update every 3 weeks, STEM Line Builder every 2 weeks. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 山形工房 けん玉 大空 OZORA KENDAMA | STEM Line Builder |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 60 MB | 118 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [DCS  CO.,LTD.](https://appshunter.io/developer/1212129186) | [Ryo Ogasawara](https://appshunter.io/developer/6793957355) |

## What reviewers say

### 山形工房 けん玉 大空 OZORA KENDAMA

[App page](https://appshunter.io/ios/app/ozora-kendama/id1293739959)

This official app from Yamagata Koubou provides resources for learning and mastering kendama. It features tutorials, skill level guides, event information, and a video channel to help users improve their techniques. Members can also access coupons for the online shop.

**Highlights:** Kendama basic explanations, Trick tutorial videos, Skill level guides, Event information, Video channel, Member coupons

**Features:** macOS Compatibility

**In-app purchases:** none


### STEM Line Builder

[App page](https://appshunter.io/ios/app/stem-line-builder-longboard/id6793957353)

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

**In-app purchases:** none


## Frequently asked questions

### Is 山形工房 けん玉 大空 OZORA KENDAMA free?

山形工房 けん玉 大空 OZORA KENDAMA is free to download, with no in-app purchases.

### Is STEM Line Builder free?

STEM Line Builder is free to download, with no in-app purchases.

### Do 山形工房 けん玉 大空 OZORA KENDAMA or STEM Line Builder have ads?

Neither 山形工房 けん玉 大空 OZORA KENDAMA nor STEM Line Builder shows ads.

### Which is updated more often, 山形工房 けん玉 大空 OZORA KENDAMA or STEM Line Builder?

山形工房 けん玉 大空 OZORA KENDAMA ships an update every 3 weeks, and STEM Line Builder every 2 weeks. Most recently, 山形工房 けん玉 大空 OZORA KENDAMA was updated on November 3, 2026 and STEM Line Builder on October 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.*