Jul 30

Lake Satoshi Testing

A stack of curated Lake Satoshi Testing applications

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bitchat A decentralized peer to peer messaging app that works entirely over Bluetooth mesh networks. Bitchat lets you talk to anyone nearby even when the internet is blocked, overloaded, or unavailable. No registration, no phone numbers, no tracking, no ads. Just install and start chatting. Free and open source. Join location based channels to talk with people in your neighborhood, city, province, or region. You can also leave notes at any location for anyone who passes by. Stay connected anywhere, on your terms.
Bouquet Bouquet renders NIP-5A static sites on Android by talking to Nostr relays and Blossom servers directly — no smart-server intermediary. Paste an npub1… or NIP-5A canonical label, the app fetches the manifest event, verifies every blob's SHA-256, and serves the result over http://127.0.0.1 to a hardened in-app WebView (or hands it to the system browser).
Echoes Offline-first, end-to-end encrypted notes — synced privately over Nostr, on your terms.
Gart Gart is the first truly private alert system. Traditional alert and geolocation-sharing apps leak your most sensitive data (your name, phone contacts, IP address, and location) to corporations, data brokers, hackers, and criminals. With AI deepfakes, advanced social engineering, and data-broker aggregation on the rise, keeping your whereabouts and those of your closest people private has never mattered more. A Gart alert only reaches your Watchers - the people you choose to trust - directly, on demand, and over a fully encrypted channel. When you trigger the Gart alert button, your app geolocates you, encrypts your position, and instantly delivers it to your Watchers via the decentralized Nostr relays. There's no company in the middle, no data harvesting, no persistent tracking. How to use Gart Log in with your existing Nostr account. If you don't have one, the app creates it for you in just one click. Allow all required permissions. Invite your Watchers to your group. Your Watchers need to install the app too - that's what lets them decrypt your alert. Legacy SMS or sharing apps can't, and they'd leak your data anyway. While waiting for your Watchers to join, edit the alert message in your group profile. Provide specific instructions and key contacts: your own phone number, plus contact details for your family, security officer, business partner, or lawyer. Include your safe and duress words, and how a Watcher can challenge you covertly to confirm whether you're genuinely under duress. Your predefined alert message is encrypted and only revealed to your Watchers when you trigger an alert. These instructions are there to make sure your Watchers can act calmly and correctly in emergency situations. Once you have some active Watchers, test the alert with each of them, so that everyone knows how it works and how to respond before you actually need it. You can test alerts completely privately - the GPS is hardcoded to Mt. Everest and a Don't panic message is attached. That's it. You're all set. When seconds matter, open the app and tap and hold the button for about 2 seconds. Your Watchers will receive your GPS coordinates, open them in their map app, and follow your instructions to help you quickly. This is a beta version for public testing. Should you encounter any bugs or have ideas for future features, simply shake your phone to send a report. Enroll as a Beta Tester to receive an invitation to our Signal support group, where you can connect with other testers and our team directly. User Manual For more information, read the User Manual.
Keep Keep is a FROST (Flexible Round-Optimized Schnorr Threshold Signatures) threshold signing app and dedicated Nostr event signer for Android. It allows users to hold FROST key shares on their phone and sign Nostr events without any single device ever holding the full private key. Keep implements the NIP-55 Android Signer protocol and NIP-46 remote signing, so any compatible Nostr client can request signatures directly. Keep keeps private key material segregated from client apps through NIP-55 and NIP-46, with per-app permissions, background signing, and multiple account support. It splits keys into FROST threshold shares (2-of-3, 3-of-5, etc.) so that no single device ever holds the complete private key. Features: FROST threshold signing (2-of-3, 3-of-5, etc.) NIP-55 Android Signer protocol (intents + content provider) NIP-46 remote signing (bunker service) Import and export FROST shares via QR code or text Import existing nsec keys Multiple account support Per-app signing permissions and policies Signing history and audit log Biometric and PIN authentication Hardware-backed key storage (Android Keystore) Kill switch for emergency key deletion SOCKS proxy support (Tor) NIP-44 encryption and decryption Background signing with configurable rate limits Certificate pinning for relay connections Encrypted backup and restore Bitcoin wallet descriptor coordination (multisig)
Meiso Meiso is a minimalist task management app built on the Nostr protocol. Inspired by TeuxDeux's clean design, it provides a simple three-column layout (Today/Tomorrow/Someday) with end-to-end NIP-44 encryption — for your own tasks and, now, for lists you share with others. Features Three-column task layout (Today/Tomorrow/Someday) Shared collaborative lists: invite people and edit a list together in real time, end-to-end encrypted so relays only ever see ciphertext Collaborator attribution: see who added or edited each shared task Recurring tasks (daily, weekly, monthly, yearly) Personal custom lists for organization Multi-device synchronization via Nostr relays NIP-44 end-to-end encryption for privacy Amber signer integration for secure key management Tor connection support via Orbot proxy Material 3 design with light & dark mode Multi-language support (English, Japanese, Spanish) Pull-to-refresh sync Drag and drop task reordering All your tasks are encrypted and synced across devices using Nostr relays, ensuring both privacy and accessibility without any central server.
Narchives An Android app for browsing web page archives published via the Nostr protocol and stored on Blossom media servers.
NostrVault NostrVault is a self-custodial Android Nostr client with your own relay and media server running directly on your device. Most Nostr clients are a window onto someone else's relay. NostrVault is the relay. A full Haven relay runs on your phone, so every note you write and every note you receive is written to storage you own before it goes anywhere else. If every relay you use disappeared tomorrow, your copy would still be on your device. HOW IT WORKS The app runs a personal relay on-device with five separate stores: an inbox for what people send you, an outbox for what you publish, a chat relay for private messages, a private relay only you can read, and a local feed cache. Your posts are written locally first, then broadcast outward to public relays on your terms. Incoming events are pulled in and kept. Because the relay is yours, notifications are generated entirely on-device from your own event stream. There is no push server — not Google's, not ours. Nothing about who contacts you, or when, is visible to a third party. A Blossom media server runs alongside it, so images and video you post are hosted from your own device and mirrored to external Blossom servers you choose, instead of being uploaded to someone else's host by default. A Web of Trust filter, built from your follow graph, decides what the relay accepts, which keeps spam out of your own storage rather than filtering it after the fact. FEATURES Personal Haven relay on-device (inbox, outbox, chat, private, feed cache) On-device notifications with no push server Blossom media server with mirroring to external servers Full client: feeds, threads, profiles, media gallery, NIP-50 search Encrypted direct messages, both NIP-17 gift-wrapped and legacy NIP-04 Remote signing via NIP-46 and Amber (NIP-55) — your key never enters the app Multi-account with biometric protection and NIP-49 encrypted key storage Lightning zaps with receipt validation, and an integrated NWC wallet Cashu ecash wallet with relay-backed backup (beta) Picture-in-Picture video Efficient relay sync using NIP-77 negentropy reconciliation SUPPORTED NIPS 01 basic protocol · 04 legacy encrypted DMs · 05 DNS identifiers · 09 event deletion · 10 threading · 11 relay information · 13 proof of work · 17 private DMs · 18 reposts · 19 bech32 entities · 29 relay-based groups · 40 expiration · 42 relay authentication · 44 versioned encryption · 46 remote signing · 47 wallet connect · 49 encrypted key storage · 50 search · 51 lists · 55 Android signer · 56 reporting · 57 zaps · 59 gift wrap · 60 Cashu wallet · 65 relay list metadata · 70 protected events · 77 negentropy sync · 92 media attachments · 94 file metadata Blossom: BUD-01, 02, 03, 04, 06, 14 Your data, your relay, your media — all under your control.
Nymchat Nymchat (NYM aka Nostr Ynstant Messenger) is a feature-rich, ephemeral chat client built on the Nostr protocol, bridged with Bitchat for pseudonymous, temporary messaging. No registration required — pick a nym and start chatting instantly, or log in with an existing Nostr account. Identity Ephemeral sessions: generate a temporary keypair and pseudonym per session Log in with a persistent Nostr identity (NIP-07, NIP-46, or nsec) Optional identity encryption with password, PIN, passkey, or biometrics Panic wipe: press-and-hold to instantly destroy all local data Messaging End-to-end encrypted 1:1 DMs via NIP-17 gift wraps (NIP-59) End-to-end encrypted group chats with rotating ephemeral keys and post-compromise recovery — relays cannot correlate group membership Forward secrecy and configurable disappearing messages Read receipts and typing indicators (per-scope: everyone, friends, or off) Rich text (Markdown), emoji reactions (NIP-25), polls, and custom emoji Peer-to-peer file sharing over WebRTC data channels Channels Location-based geohash channels (kind 20000) Named topic channels (kind 23333) Geohash Explorer: browse location channels on an interactive globe Voice & Video 1:1 and group audio/video calls — signaling over NIP-17 gift wraps, media peer-to-peer over WebRTC Lightning Send and receive Lightning zaps on messages and profiles (NIP-57) In-app flair shop: buy cosmetic styles and badges with Bitcoin Privacy & Moderation No Google Play Services, Firebase, or trackers User and keyword blocking, flood protection, image blur Group roles: owner, moderator, kick, ban, transfer ownership Customization Themes: Bitchat, Matrix Green, Amber Terminal, Cyberpunk, Hacker Blue, Ghost IRC-style or bubble layout, adjustable text size, wallpapers
PearCircle PearCircle is a private, peer-to-peer location-sharing app. Share live location and presence with the people in your circles, with no account, no tracking, and no company holding a copy of your data. Features: Private circles with invite-link or QR pairing Multiple circles per identity Place geofences with arrival / departure notifications Motion-aware pins (walking, driving, flying, stationary) Trip history with per-circle opt-in sharing Sharing pause for the rest of the day Offline map tiles - download a region for trips into dead zones Fully offline-capable - your circle's data stays on your devices One exception worth stating: some networks stop two phones connecting directly. When that happens PearCircle can fall back to a relay PeerLoom runs, which forwards encrypted data it cannot read and stores nothing. Your phones try a direct connection first, and one switch in Settings turns the relay off entirely.
PearList PearList keeps a household's shared lists in sync across everyone's phones, peer to peer, with no server, no account and no third party in the middle. One household group holds many lists. Any member can add, check off, rename, assign and delete items, and every change syncs directly between your devices. The assignee field doubles the grocery list as a chore board. Features: Multiple shared lists per household (groceries, to-dos, chores) Add, check, rename, assign and delete items, synced across all members Assign items to a person to use any list as a chore board Join a household by scanning a QR code or tapping an invite link Fully offline-capable - your lists stay on your devices No account, no sign-up, no server
PearCal PearCal is a private, peer-to-peer calendar app. Share events directly with people you trust, with no server, no account, and no third party in the middle. Features: Create and manage personal calendar events Share events with peer groups over a direct P2P connection Import public holidays for US, Canada, and UK Invite members via QR code or share link Fully offline-capable — your data stays on your device
Myco Share small apps with the people around you by tapping your phones together — like handing someone a card. It works completely offline: no internet, no app store, no sign-up. Tap to share, and the app lands on their phone, ready to open. Everything travels straight from phone to phone over Bluetooth, so it keeps working with no signal at all — on a plane, at a festival, off in the mountains, or when the network goes down. Once you've connected with someone you're in each other's circle: pass apps back and forth, chat, and see what others nearby are sharing — all without a connection. Apps open instantly and live on your phone; pin your favourites to the home screen like any other app. Comes with a built-in chat to get started, plus a growing set of community apps — from group messaging to tools for coordinating in an emergency. Your identity is a key that stays on your device, not an account in someone's database. Nothing needs a server. Nothing phones home. Built for anywhere the internet isn't.
Hanami Android companion app for Hanami, a Blossom server with a built-in file manager and other features.
ntrack ntrack shares your live location with a group of people you choose — over the Nostr network, with no accounts and no central server. Locations are end-to-end encrypted (NIP-44 v2), so relays only ever see ciphertext from a throwaway sender key that is never linked to a personal Nostr identity. Any Nostr relay works. A group is simply a shared keypair. Hand its secret key to the people who should see you — holding it lets them decrypt, the public key is enough to send. The key is the membership, so rotate it whenever membership changes. Share — publish your encrypted location at a set interval. Track — follow your groups on a live map; incoming locations are verified, deduplicated and decrypted on-device, each with an "open in maps" shortcut. Alert — in a dangerous situation, one tap raises a duress alert (starting a share if needed): your updates speed up and a loud, pinned notification reaches every group member. A check-in timer can auto-escalate to it if you don't confirm you're safe in time.