Self-custodial Bitcoin payments

Pay. Get Paid. Stay Sovereign.

Ark One is for spending Bitcoin. Ark Merchant is for the businesses that don't want a middleman. Both keep your money in you.

No accounts · No custodians · No permission needed
The ecosystem

A wallet for spending.
A wallet for accepting.

9:41
ARK ONE
Self-custody
"
"Bitcoin is the first scarce digital object." — Fidelity
Spendable balance
$ 1,240 .50
₿ 0.01240500 ↗ +2.4%
Balance expires in 9 days
Refresh your VTXO · ~300 sats fee
Today
See all
Coffee · Lightning
14:02 · bc1q…h7m
−$4.50
From Mia
09:11 · ARK
+$120.00
Ark One

Everyday money. Actually in your hands.

A consumer wallet for spending Bitcoin without thinking about Bitcoin. Pay anyone, receive from anywhere, hold your own keys.

9:41
ARK MERCHANTS
Live
Today's revenue
$ 3,847 .20
₿ 0.03847200 ↗ +12%
Transactions
14
+3 vs yesterday
Avg ticket
$27.48
5–500 range
Recent payments
14 today
Table 7
14:22 · Lightning
+$48.00
Counter
13:58 · ARK
+$12.50
Ark Merchants

Accept Bitcoin. Keep every sat.

Point-of-sale for businesses that want to be paid in Bitcoin and settle to their own keys — no processor, no chargebacks, no middle.

Why this feels different

Bitcoin payments that don't
make you feel nervous.

01

It just works

Tap to send. Scan to receive. The protocol underneath is sophisticated; the surface is not.

02

It's actually yours

You hold the keys. Ark cannot freeze, censor, or revoke your balance. Self-custody, by default.

03

You can always leave

Your funds settle to Bitcoin. Move on-chain whenever you want. No lock-in, no platform.

04

It speaks Lightning too

Send and receive over Lightning natively. The interface stays the same; the rails handle themselves.

Ark One

Spend Bitcoin
without thinking
about Bitcoin.

A wallet built around the way people actually pay — instant, private, and always under your own keys.

  • One balance, two rails. Lightning for everyday spend, on-chain for everything else. The wallet picks the cheaper route.
  • Seed-phrase backup, biometric protect. You set it up once. Your phone guards access; the seed lives only with you.
  • VTXO health, in plain English. A clear bar tells you when to refresh — never a balance that quietly stops working.
9:41
ARK ONE
Self-custody
Spendable balance
$ 1,240 .50
₿ 0.01240500 ↗ +2.4%
VTXO health 78% · 9 days
Spendable through Mar 14 · Refresh anytime
Today
See all
Coffee · Lightning
14:02 · bc1q…h7m
−$4.50
From Mia
09:11 · ARK
+$120.00
Ark Merchants

Accept Bitcoin
wherever you sell.
Keep every sat.

A point-of-sale for shops, counters and counters of one — a payment terminal you actually own.

  • Charge in your currency. Quote in dollars, euros, or sats. Customers tap, you settle — no exchange, no processor.
  • Zero chargebacks. Zero rolling reserve. Once a payment clears, the money is in your wallet. Final.
  • Today's totals, by glance. Revenue, transaction count, average ticket — surfaced where you actually look.
9:41
Ark One — For Merchants
Live
Charge customer
48 .00
≈ ₿ 0.00048200 · 48,200 sats
Tap to edit · Lightning + on-chain
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Charge €48.00

Quiet software.
Serious money.

Bitcoin only

We don't list tokens. We don't run a chain. There is one asset and one network, and the wallet is built around its grain.

Control by default

Self-custody is not a setting. There is no account, no recovery email, no support line that can restore your funds.

One thing per screen

Every screen does one thing well. No upsells, no toasts, no dashboards within dashboards. Just the next move.

Built on Ark

We built the wallet.
They built the rails.

Ark One is built on Ark — an open-source Bitcoin Layer 2 protocol developed by Second.tech. Their work makes instant, self-custodial Bitcoin payments possible on Bitcoin as it exists today. No soft forks. No new opcodes. No compromises.

Open protocol
Anyone can inspect, audit, or build on Ark.
Open client
The reference implementation (Bark) is fully open source.
Independent teams
Second.tech maintains the protocol; we maintain the wallet.

Built for people who use Bitcoin.
Built for businesses that accept it.

Join the early-access list. We'll send one note when Ark One opens, and one when Ark Merchant follows.