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DAILY COST & PURCHASE PLANNING FOR iOS
Before you buy, weigh the cost. After you buy, see the daily cost.
Plan a purchase, then track its costs and remaining value.
From laptops and headphones to bicycles, keep track of your belongings.
A NEW PERSPECTIVE
A laptop. Headphones. A bicycle.
A new way to see the things around you.
Put a price into perspective with current value
and the time you have spent together.
Straight-line, double-declining, or manual valuation.
Follow the changing value of your things.
Explore purchase plans and financing estimates.
See tomorrow’s payments and costs today.
Record original currencies, review in your base currency.
Keep your whole asset picture in view.
Categories, tags, and home-screen widgets.
Record a little. See the whole picture.
YONGDU PRO
Free
Assets, expenses, and sales; purchase planning, loans, and currencies; basic statistics, category breakdowns, and individual value trends; JSON backups, CSV export, app lock, and widget.
YONGDU PRO
Everything in Free, plus complete cost flows, daily cost rankings, amortization trends, spending timelines, plan progress, selectable analysis periods, and optional iCloud asset sync.
Three plans, the same Pro features. Monthly and annual renew automatically; lifetime is a one-time purchase. See current App Store prices in the app. Basic tracking and calculations are free; expiry does not delete assets.
Purchases, restoration & subscriptions →THE COST LAB
What does a CN¥8,000 item cost each day?
Move the sliders to explore your long-term plan.
YOUR DATA, YOUR SPACE
Your asset data stays on your device by default.
Record your life. Keep it yours.
JSON backup and restore, plus CSV exports. Keep your own copy.
Local passcode, Face ID / Touch ID, and a privacy cover.
Pro offers optional iCloud asset sync while the app is open. Keep independent backups.
GOOD TO KNOW
Yongdu follows each item from purchase planning through ownership: compare upfront payment or loan scenarios, then record expenses, values, and sales to track daily ownership costs and remaining value. Daily costs use holding days, not the number of times you use an item.
The hero shows an actual screenshot of the app’s Dashboard. The lab uses a simplified planned daily cost: purchase price minus planned residual value, divided by planned days. The app’s current amortized cost instead uses costs to date, current value, and elapsed days.
Yongdu supports iOS 17.0 or later and five language options: English, Japanese, Simplified Chinese, Traditional Chinese (Taiwan), and Traditional Chinese (Hong Kong).
No. The calculator runs locally in your browser. This website has no asset-upload endpoint or analytics scripts. Contact links open your mail app. The hosting provider may process access logs needed to serve the website.
Start with one thing you use every day.
Find what makes it worthwhile.