The ACK card is a Visa/Mastercard debit card that accepts any currency or stablecoin, with 0% FX markup anywhere in the world. Digital or physical — your choice. - $0 card fee — No issuing, monthly or annual fee - 3–4% APY — Annual interest on your entire balance, every day - 0.5–1% cashback — On everything you buy - No minimums — No minimum balance. No minimum spend. ACK Fintech Inc. is a financial technology company, not a bank. Banking services are provided by a partner bank.