Lister — Listing Manager

No items yet. Add one by hand, or import a file in Settings — this app ships empty on purpose; your data enters only through imports you choose.

Item

Name

Kind Custody

Grader Grade Cert #

Cost basis ($) Master asking price ($)

Notes

Listings for this item

Add a listing

Platform Status

Price ($) — blank = master price Listed date

Listing URL or ID (typed by you — the app never fetches it)

Nothing live right now. When a listing's status is Live, it shows up here.

⚠ Delist Queue

These listings are still live on other platforms for items that already sold. A live duplicate can sell twice. Take each one down on its platform, then confirm it here.

Queue clear — nothing at risk of double-selling.

No sales recorded yet. Mark a listing Sold and it lands here.

Data

Import

Bring in a Lister backup (restores everything) or an items file (adds items). Files are integrity-checked before anything is touched; a file that fails its check is refused and your data is left exactly as it was.

Export

Your whole dataset, in one sealed JSON file you own.

About

Lister is a cross-platform listing manager: one product, every platform it's listed on, what state each listing is in — and a delist guard so nothing sells twice.

Your data lives on this device. There is no account, no subscription, and no upload — and it leaves only in a file you export.

Lister never contacts a marketplace: no sign-ins, no fetching, no scraping. You post; it prepares, tracks, and guards. Listings on closed platforms are always posted by you, by hand.

Danger zone

Erase everything stored in this app on this device. Export a backup first if you want it back.

⚠ Saved data failed its integrity check

The data stored on this device does not match its checksum, so Lister will not open or overwrite it — it may be damaged, or something changed it. Nothing has been altered.

You can download the stored data exactly as found (for inspection), or erase it and start empty.