OneDay: Cost Per Use Tracker

Track the real cost-per-day of everything you own. Free for 30 items, unlock unlimited once.

One formula, one number — the true value of the things you own.

OneDay tracks the daily cost of every item you own. How much does that iPhone really cost you per day? Was that coat worth it?

• Today's Cost — your total daily living cost at a glance • Cost Per Day — auto-computed; the longer you use it, the lower it goes • Smart Insights — category breakdown, trends, best-value picks and idle-item alerts • Daily Reminder — a gentle nudge at the time you choose • Home-Screen Widget — today's cost and category breakdown at a glance • iCloud Sync — your data stays in sync across your devices • Export — one tap to JSON / CSV for backup

Free for up to 30 items with every feature included. Need more? A single one-time "Unlimited Items" purchase unlocks unlimited items forever — not a subscription, no monthly fee.