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Coinos 1.9

Self-custodial bitcoin wallet: Ark spending, on-chain savings, nostr chat

filecart Android
Download 2.79 MB · io.coinos.fdroid_10.apk
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About Coinos

Bitcoin you actually hold: your wallet is twelve words, nobody else ever has them, and they work in any wallet, anywhere.

* Spending over Ark: instant, low-fee off-chain payments with a unilateral exit — your keys, your coins
* Savings on-chain: a full BIP84 bitcoin wallet
* Lightning sends and receives via the coinos Ark server, plus a name@coinos.io payment address (BIP-353, LNURL, BOLT 12)
* Nostr built in: encrypted DMs, community chat, posts, zaps
* Handles lightning:, bitcoin:, nostr: and lnurl: links and NFC taps

This build carries the whole app inside the APK. The coinos servers are only reached for their APIs (the Ark server, Electrum, the name registrar).

Other servers it talks to: Nostr relays (yours, configurable); Cloudflare's or Google's DNS-over-HTTPS, to look up and DNSSEC-verify name@domain payment addresses; and, while you read posts, whatever hosts the posts' pictures and link previews live on (YouTube thumbnails from i.ytimg.com among them).

License: MIT
Release info New Release on Nov 06, 2026
Release notes Push wake-ups run the bundled app, never the live site; files the APK doesn't carry are no longer fetched from the network. No stray launcher icon. Notification permission is asked only when a UnifiedPush distributor is installed.
Listing dataF-Droid

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