Flea Profit Book – Resale Log

After “Sold!” comes “So how much did I actually keep?”
Flea Profit Book is a profit ledger for individual sellers. It shows your “real profit” after the fees and shipping of Mercari (メルカリ), Rakuten Rakuma (楽天ラクマ), Yahoo! Flea Market (Yahoo!フリマ) and Yahoo! Auctions (Yahoo!オークション, formerly ヤフオク!) the moment an item sells.
From sedori and side-hustle reselling to clearing out things you no longer need. You can also export a CSV for your tax return (確定申告) as a single file.

Just enter the purchase price and the sale price. Your profit and margin after each platform's fee, shipping and packaging appear as you type. No more staring at spreadsheets at the end of the month.

■ Know your profit the moment it sells
• Fee rates for Mercari, Mercari Shops, Rakuten Rakuma, Yahoo! Flea Market and Yahoo! Auctions (formerly Yahuoku!) are preset. You can also record fee-free sales, such as in-person handovers
• Enter the fee amount manually for any sale if needed (for promotions and variable rates)
• Pick shipping costs from “recently used amounts” with one tap

■ In stock, listed, sold – at a glance
• Just add an item and switch its status
• Swipe a row to “Record Sale” right there
• Attach one photo (no access to your whole photo library needed, and no permission pop-up)

■ Your balance, always at the top of Home
• How much you sold this month and how much you kept – visible as soon as you open the app (this year's balance with Pro)

■ Yearly summary and tax return CSV (Pro)
• Revenue, purchase costs, fees, shipping, packaging, expenses and net profit totaled by year
• Monthly charts show your best months, plus a breakdown by platform
• Export yearly totals, sales details and expense details as one CSV file (UTF-8 with BOM; opens as is in Excel, Numbers and Google Sheets)

■ Expense records (Pro)
• Costs not tied to a sale, such as bulk purchases of packing materials, are reflected in your net profit

■ Past records never change on their own
• The fee rate at the time you record a sale is saved with it. Changing the rate later doesn't alter past totals
• Only if you edit the purchase price are that sale's record and the totals updated

■ No login. No server. Your data stays on your device
• No account sign-up, no waiting for sync, no worrying about lost data
• Backup export and restore are free and unlimited, so switching phones is worry-free

■ Pricing
• Free: unlimited items, up to 20 sale records, this month's summary, fee settings, backups
• Flea Profit Book Pro (one-time purchase, ¥980 – price on the Japanese App Store; other countries/regions show the local price): unlimited sale records, yearly summary and monthly charts, tax return CSV, expense records
• Not a subscription. No auto-renewal
• The yearly totals and CSV included with Pro cover “the purchase year and the following year”. Later years can be added with the Yearly Summary Pack (one-time purchase, planned for a future update). Sale records, monthly charts, expense records and CSVs you've alread