Rule of Three Calculator Pro prices by country

Observed local App Store prices with one dated reference-currency comparison.

Regional price summary

Among 5 observed Apple App Store storefronts, Taiwan has the lowest reference-converted download price for Rule of Three Calculator Pro: $60.00 (about $1.87 using the 2026-08-15 reference-rate snapshot).

Lowest observed: Taiwan · $60.00
Highest observed: Switzerland · CHF 2.00
Observed storefronts: 5
Observed spread: 31% vs. lowest
Rate date: 2026-08-15
Latest observation: August 13, 2026

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Observed App Store prices

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.

USD rates · 2026-08-15

Rank	Storefront	Local price	USD reference	Observed	Details	Official store
#1	TWTaiwan	$60.00TWD	$1.87	August 13, 2026	Country price	App Store ↗
#2	USUnited States	$1.99USD	$1.99	August 11, 2026	Country price