
ProductGapRadar
Find US App Store hits not yet available in Japan.
12 followers
Find US App Store hits not yet available in Japan.
12 followers
Discover apps gaining traction in the US that haven't been localized or released in Japan yet. An information hub for indie developers hunting their next opportunity.



How often does the data refresh, and is it pulling from app store rankings directly or some third-party source? Curious how reliable the traction signals actually are.
@erginel28238 Daily via GitHub Actions cron. Source is Apple's own official RSS charts (US top-100 free/paid) cross-checked against the iTunes API for JP availability — no third-party estimate data.
How often is the data refreshed, and what sources do you pull from to confirm an app is actually gaining traction rather than just getting a brief spike?
@ezraksat5896 Daily (GitHub Actions cron). Sources: Apple's official RSS charts (US top-100 free/paid) for rank, cross-checked with the iTunes API for rating count/average. Right now it's a snapshot at time of detection — no multi-day sustained-rank tracking yet, so it can't distinguish a lasting trend from a brief spike. That's on the roadmap.
How does it actually flag traction in the US though, just download rank jumps or something deeper like retention or revenue signals?
@hamidetakntgk3 Right now it's just US App Store chart rank (top-100 free/paid) plus rating count/average from the iTunes API — no download-jump delta, no revenue or retention data. It's "currently ranking in the US" as the signal, not a deeper growth metric.
How do you actually determine traction in the US market, like is it based on downloads, revenue, or some blend of metrics you track?
@azizileskaxtxg It's based purely on US App Store chart rank (top-100 free/paid, from Apple's own RSS feed) — not downloads or revenue data, since Apple doesn't expose those publicly. Rating count/average from the iTunes API is the only secondary signal.
How do you actually source the traction data, and is it updated daily or more like a weekly snapshot?
@kumsaldanmkkvf Daily, via GitHub Actions cron. Source is Apple's official RSS charts (US top-100 free/paid) — chart rank is the traction signal, no third-party data.
Finally a focused lens on the US-to-Japan gap. Scrolling through trending apps that skipped localization gave me three solid leads in under five minutes.
@eymenevf2 Thank you! We plan to support multiple languages moving forward.