Longbox Ledger

Spot missing issues instantly

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Backnumber is a fast, fully offline tracker built for people who collect single comic book issues — not trade paperbacks, not digital bundles, just the individual issues in your longbox. Add what you own, see exactly which issues are missing from every series, and keep a want list for the ones you're still hunting down. Every other comic app wants your Wi-Fi and your email address. Backnumber doesn't. There's no account, no cloud sync, and no ads — your whole collection lives in a single file on your device that you can back up or hand off whenever you want. WHAT YOU CAN DO • Log every issue: series, issue number, publisher, variant, condition, and price paid • See series completion at a glance — Backnumber shows exactly which issue numbers you're missing from any run • Keep a separate want list and move items to your library the moment you track them down • Mark issues unread, reading, or read to keep your to-read pile organized • Scan a barcode to speed up entry, or type it in by hand • Back up your whole collection to a JSON file, or export a CSV for spreadsheets and insurance records Backnumber Pro unlocks series completion analysis, barcode scanning, and CSV export with a single one-time purchase — no subscription, ever.

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The developer, 永 张, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

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    Information

    Seller
    永 张
    Size
    793.6 KB
    Category
    Utilities
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 26.0 or later.
    Languages
    English and Simplified Chinese
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    Copyright © 2026 Peter Zhang. All rights reserved.
  • Developer Website
  • Privacy Policy

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