Bookstacks is a simple iOS app for managing your book collection.
Scan any ISBN barcode to register a book — title, author, and cover image are fetched automatically via the OpenBD API. No account needed; everything stays on your device.
Key features:
• ISBN barcode scanner + manual entry
• Auto-fetch book metadata and cover images
• Organize books with custom labels
• Set covers from camera or photo library
• Search your entire shelf instantly
• Available in English and Japanese
See where your money will be in 10–30 years.
Enter income, expenses, investments, and loans — the app projects your monthly net worth using compound interest.
• Net worth chart (assets, cash, investments, debt)
• Annual & monthly view + detailed data table
• Loan repayment calculated per item
• Multi-currency: JPY / USD / EUR
• Save & switch between multiple scenarios
• Inflation & wage growth rate settings
• Dark mode · EN/JA
Eliminate the anxiety of "Did I do that?"
Tap once to log your routine with a timestamp. Auto-resets on launch — zero maintenance.
• 1-tap completion with timestamp
• Auto-reset daily
• Flexible repeat: daily / every N days / specific weekdays
• Up to 10 completions/day with progress count (e.g. 2/3)
• Calendar history with completion times
• Smart reminders + incomplete task alerts
• Dark mode · EN/JA
