Restore purchases
Open Loan Calculator, go to the upgrade or settings screen, and tap Restore Purchases. Use the same Apple ID that made the purchase.
App support
Build an amortization schedule for any loan — mortgage, auto, student, business — then model how each $100/month extra payment shaves years off the term and thousands off the interest. On-device, $19.99 once.
Open Loan Calculator, go to the upgrade or settings screen, and tap Restore Purchases. Use the same Apple ID that made the purchase.
Apple manages App Store billing. Open iPhone Settings, tap your name, choose Subscriptions, then select Loan Calculator.
Include your device model, iOS version, app version, and the exact action you were trying to complete.