Portfolio Balance
—
USDB
Loading…
Sandbox · test
— corridors
Quick actions
Recent Transactions
Loading transactions…
Bitcoin Balance · Bark
—
sats
spendable: —
pending: —
Signet · test
🐶 Initializing Bark wallet…
Nostr Identity
npub (public key)
—
nsec (private — never share)
•••••••• (click to reveal)
Ark Address
—
Click to copy · Self-custodial via Bark SDK (Second) · Lightning send/receive built in
Coming soon
VTXO management
Advanced virtual UTXO control
Onchain board / offboard
Move bitcoin on and off Ark from the app
Visa card
Spend sats anywhere via Lightspark
Intelligence Engine
Private Cloud Compute
Apple FoundationModels · Requires macOS 26+
Private Cloud Compute
Offload large reasoning tasks to Apple's private, attested cloud servers
On-device only
Force all inference to stay on your Mac — no network required
🍎 Checking macOS version…
Cerebras · Fast Inference
LIVE
Chat
llama-3.3-70b
Cerebras
higherMark AI
On-device intelligence via Apple PCC · Fast inference via Cerebras. Your keys stay on your device.
STEP 1 · YOUR IDENTITY
Identity active
npub · public key (share freely)
—
nsec · private key (never share)
•••••••• · click to reveal for 10s
MEMBERSHIP · $19.99/MO
AI inference funding · pooled credits · product feedback · direct contributions & PRs. Wallet and fiat ramps are always free.
STEP 2 · FEATURE ACCESS
Each tier unlocks as you set things up. Start with just your npub.
Active now
AI + Identity
Works the moment your npub is generated · no setup needed
Private Cloud Compute (macOS 26+ · Apple Silicon)
Cerebras streaming chat — bring your own key (csk-…)
Live exchange rates — 13 corridors (ACH / PIX / SEPA / UPI…)
Nostr identity · npub / nsec · encrypted keychain backup
Top up to unlock
Lightning Wallet
Send sats to your Ark address to activate
Bark self-custody wallet (Second) — keys never leave this device
Pay-as-you-go Cerebras AI — metered per 1K tokens in sats
Send / receive Lightning payments · Boltz swaps
Your Lightning address
Open Wallet tab to view →
Email required
Global Fiat Ramp
One-time email OTP · no password · no account to remember
USDB embedded wallet balance
Send ACH · PIX · SEPA · SPEI · UPI · UMA globally
Transaction history · quotes · receipts
Connect your Grid account
Lightspark sends a one-time code to your email. No password. Your nsec stays local.
Enter the code sent to
Grid account connected
Coming soon
iOS · Web · Chrome · Visa Card
Roadmap items in active development
iOS App — SwiftUI · Face ID · Apple Pay
Web App — Progressive Web App
Chrome Extension — inline Lightning payments
Self-hosted arkd launcher — one-click sovereignty
Visa Card — spend USDB via Apple Pay
Settings
Dark mode
Black glossy Apple Silicon theme
Developer
About
higherMark 0.1.0-alpha
macOS · Apple Silicon · Tauri 2 + Rust + Swift
Privacy
Keys in OS keychain · no telemetry · no account required
Powered by
Apple PCC · Cerebras · Bark (Second) · Lightspark Grid · Lightning
Roadmap
iOS · Web · Chrome · Self-hosted arkd · Visa card
What's live · what's in test
AI chat · Cerebras + PCC
Real inference, real spend
Nostr identity
Real NIP-19 keys, generated on-device
Bitcoin wallet · Bark
Signet (test coins) by default · mainnet opt-in on Dev tab
Fiat ramp · Lightspark Grid
Sandbox — no real money moves yet
Arkade node integration
Dev tab · being reworked
NOSTR · AI · POOL
Public Inference Credits
Community-funded · operator-seeded · open access
Active
1.0% cut
Pool balance
$—
Used: $0
0 tokens served
$0
contributed
0
contributors
1.0%
platform cut
Platform cut scales 1–10% as the pool grows — a difficulty adjustment that covers operating costs. More contributors → more tokens for everyone.
Your Credits
Free credits (first launch gift)
1000 / 1000
~$1.00 remaining · 1000 credits = $1 of AI inference
Use pool credits
Draw from the shared community pool instead of your own free credits or key
🎁 Using your 1000 free credits — switch on pool mode to use shared funds
Why use the pool
Unlimited inference as long as pool has credits
No API key needed — works instantly on first launch
Contribute to grow the pool for everyone
Why Cerebras
~27× faster
Cerebras · Llama 3.3 70B
2,200 tok/s
Cerebras · GPT OSS 120B
3,000 tok/s
GPT-4o
~80 tok/s
Claude Sonnet
~90 tok/s
Gemini 1.5 Flash
~120 tok/s
Cerebras uses custom silicon (CS-3 wafer-scale chips) designed specifically for inference. When you top up pool credits or use your own key, you get streaming responses in real-time — entire paragraphs appear in under a second.
Pay As You Go · Top Up With Sats
Send yourself any amount of satoshis (Wallet tab → Receive), then convert them to inference credit here — paid straight from your Bark wallet. No subscription needed.
Contribute to Pool
Add USDB to the shared pool. A small platform cut (currently 1.0%) goes toward infrastructure. The rest is available to all users immediately.
Pool contributions are one-way — they fund shared inference for all users. Not a subscription. No refunds. Pure contribution.
In Development
Experimental Features · Test Stage
Everything on this tab is actively being worked on and may break or change
Arkade Node
Being reworked
🚧 The Arkade wallet integration has known issues and is in a test stage. The Wallet tab now runs on the Bark SDK (Second). This panel is for connecting your own arkd node while the integration is reworked.
Connect own arkd instance
Use your own self-hosted Ark node instead of arkade.computer
🌐 Using arkade.computer (hosted)
Bark Wallet · Network
Use Bitcoin mainnet
Off = Signet (test coins, default) · On = real bitcoin via ark.second.tech
🧪 Signet — get free test coins at signet.2nd.dev
Currently in flight
Bark SDK wallet
Live on Wallet tab · signet by default, mainnet behind the toggle above
Arkade / arkd integration
Connection issues under investigation · superseded by Bark for production
Self-hosted arkd launcher
One-click arkd node from the app