obota vs STEM Line Builder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
obota
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Where are you skating today? Discover skating spots and events on the map with obota. Find crew meetups, check their location and time, and share your skating experiences in the community.
STEM Line Builder
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STEM Line Builder helps you design "lines" (routines) for longboard dancing. Upload a carving video filmed head-on and the AI reads your posture to draw your board's trajectory as a top-down map. Then just tap a carve on the path and place a step you've learned -- only steps that fit the carves before and after are offered, so your line always flows. --- About subscriptions - Yearly plan: 4,000 JPY / year (auto-renewing) - Monthly plan: 500 JPY / month (auto-renewing) - Lifetime: 8,000 JPY (one-time purchase, does not renew) Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period, and are billed to your Apple ID. You can cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ryoogasawara981.github.io/stem-line-designer/privacy.html
Screenshots
Verdict
obota and STEM Line Builder are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
obota ships an update every 5 days, STEM Line Builder weekly. The most recent releases landed on September 11, 2026 and September 23, 2026 respectively.
| Parameter | obota | STEM Line Builder |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days — better | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 68 MB | 98 MB |
| Age rating | 4+ | 4+ |
| Developer | seokhwan jang | Ryo Ogasawara |
In-app purchases
obota
No in-app purchases
STEM Line Builder
No in-app purchases
