AppPriceData
Observed local App Store prices with one dated reference-currency comparison.
Across 6 observed Apple App Store storefronts, Mental Math Games: Numbio is free to download in every stored observation. Each country row keeps its own storefront and observation date.
Rows are sorted by the USD reference conversion when a supported exchange rate is available. The local price and currency remain the original source values.
| Rank | Storefront | Local price | USD reference | Observed | Details | Official store |
|---|---|---|---|---|---|---|
| #1 | DEGermany | GratisEUR | $0.00 | August 11, 2026 | Country price | App Store ↗ |
| #2 | ESSpain | GratisEUR | $0.00 | August 11, 2026 | Country price | App Store ↗ |
| #3 | JPJapan | 無料JPY | $0.00 | August 14, 2026 | Country price | App Store ↗ |
| #4 | KRSouth Korea | 무료KRW | $0.00 | August 14, 2026 | Country price | App Store ↗ |
| #5 | TWTaiwan | 免費TWD | $0.00 | August 13, 2026 | Country price | App Store ↗ |
| #6 | USUnited States | FreeUSD | $0.00 | August 5, 2026 | Country price | App Store ↗ |