Worked example

The U.S. listing shows 4.99 monthly and 39.99 annually. Twelve monthly payments total 59.88. The annual difference is 19.89, or 33.2% of that monthly total.

How the calculation works

The comparison is 12 × monthly price minus annual price. The percentage uses the 12-month monthly total as its denominator. A zero monthly total has no percentage comparison. The tool can also show when annual costs more.

What the result does not establish

Trials, regional tax, refunds, and partial years are excluded. Apple confirms actual price, trial eligibility, and renewal terms before purchase. The tool cannot determine trial eligibility.

Keep the connected record.

Coldbore keeps firearm identity, photos, documents, maintenance, and range sessions together on your iPhone or iPad.

Unlimited records, ordinary reports, exports, iCloud Backup, and app lock stay free. Collection Check, Collection Pack, Renewals, and Costs and history need optional membership.

Get Coldbore free

iOS 17 or iPadOS 17 and later. No Coldbore account.

Reviewed October 2, 2026.