A record of every firearm you own, encrypted on your phone and nowhere else.
ArmsLedger catalogues your collection — make, model, calibre, and above all the serial number. Every record and photo is encrypted on the device with a key derived from a PIN you choose. There is no account, no server and no cloud sync.
Serial numbers are what an insurer asks for on a claim, what police need on a report after a theft, and what proves who a firearm was sold to. Most owners keep them in a notebook, a spreadsheet, or nowhere at all. ArmsLedger is built to hold them properly.
The ledger lives on the phone. There is nothing else holding it.
Every record and every photo is encrypted on the device with a key derived from a PIN you choose. Locked, the data is unreadable. There is no recovery path and no back door, because the PIN is the only thing that unwraps the key.
No account, no sign-up, no server holding a collection, no cloud sync. The ledger is on the phone and nowhere else.
The app locks when it goes into the background, and blocks screenshots by default.
If you choose to use AI identification, that single photo is sent to an AI service to read the make and model. It is expressly instructed never to identify or repeat a serial number, and anything it returns that mentions one is discarded. You can type every record by hand and never use it — the app is fully usable without it.
Catalogue by category
Pistols, long guns and suppressors, each kept as its own record with the detail that matters when you need it.
AI identification, if you want it
Photograph a firearm and the app fills in the make, model, calibre, finish and any attached accessories, flagging aftermarket parts that differ from how it left the factory.
It is always optional. Manual entry is a first-class path, not a fallback, and the AI is forbidden from reading or repeating a serial number.
Rounds fired, counted against the next service
Record each trip with the date, rounds fired and a note. Each firearm carries its own service interval, so the app can tell you how many rounds remain before the next strip and inspect.
Firearms that have left the collection stay in the ledger
Sold, traded, lost or stolen — the record is archived rather than deleted. If police ask who a firearm was sold to, deleting the record is the worst thing an owner could have done.
Move the whole collection to a new phone
Export the collection as a single device file containing a spreadsheet, a complete data file and every photo, then restore it on the new phone.
A CSV for insurance or your own records
The whole collection as a plain spreadsheet, exported when you ask for it.
Questions
What happens if I forget my PIN?
The data cannot be recovered. The PIN is the only thing that unwraps the encryption key, and nobody holds a copy of it. That is the trade-off for real encryption.
Do you see my data?
No. There is no account and no server holding your collection. Nothing is uploaded.
Does the AI see my serial numbers?
The AI only runs if you choose it, on the single photo you send. It is expressly instructed never to identify or repeat a serial number, and anything it returns that mentions one is discarded. You can enter every record by hand instead.
What if I lose my phone?
Restore from a backup file you exported yourself. There is no copy anywhere else, so export a backup and keep it somewhere you control.
Get ArmsLedger
No account. Nothing to set up but a PIN.