this is the live builder — drag a target right on the bar, hold rebalance and confirm the trades. your portfolio data never leaves your device.
NAV · SAMPLE DATA
104.82
since first deposit
Drift detected
rebalance when you decide
take control — try it
9:41
Builder
Overview
Cash
4.0%
Available
0.0%
Allocated
96.0%
Actual Allocation
Target Allocation
CashAvailableAllocated
Portfolio Rebalance
Hold to realign your funds to their target allocations
Fund builder
Core Crypto
BTCETH
-1.8%
Target 40%Now 38%
DeFi Basket
UNIAAVE+1
+1.6%
Target 31%Now 33%
Stable Reserve
USDCDAI
-0.1%
Target 25%Now 25%
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why david exists
Funds, managers, platforms — every layer between you and your investments takes a percentage, every year. David is a tool you buy once.
Ongoing fees compound; a one-time tool doesn’t.
privacy architecture
We can't see your money — and that's the point.
your portfolio data and broker api keys never leave your device. there is no david server that knows your positions — so there is nothing to leak.
01
Stored on your iPhone
Your portfolio data lives in the app's private storage on your iPhone. Your broker API keys live in the iOS Keychain, protected by the Secure Enclave — not on anyone's server.
02
Direct to your broker
You connect with your own API key. No aggregator in between, no sync that silently breaks — and the broker relationship stays yours, not ours.
03
A backend kept minimal
Server-side there is only your account sign-in, your feature access and purchase verification — strictly separated, never touching your positions or balances. For now, your fund configurations stay on your device.
Data we don't have can't be stolen.
features & pricing
Roadmap
one timeline: what you can buy today, and what's coming. every feature is a one-time purchase — no subscription, no vendor lock-in.
Buy once. It's yours.
Builder
Fund constructorAvailable
Compose your own fund from the assets on your broker — pick assets, set weights, and rebalance on your moment.
A tool that helps you rebalance — setup an interval, get a reminder! Helps you execute your rebalances on time, no automated trading.
Builder
DeFiRoadmap
Build funds with DeFi assets.
Purchases run through the App Store. Each feature is a one-time purchase — buy it once, it's yours.
the people behind it
Built in the Netherlands. Working for no one but you.
“Since college I've believed one thing: investing should be within everyone's reach — not the privilege of a few. Wealth managers and pension funds take a slice of your returns for work you can do yourself, with the right tools. Software alone isn't enough — your judgment is what matters. David Owl gives you the tools; every decision stays yours.”
— Jeroen Swaagman, founder, C capital bv
C capital bv · KvK 82436665 · Netherlands
Software — not a wealth manager, no investment advice
Transparent one-time pricing via the App Store
Regular feature releases — bugfixes and security patches always free
You ask. We answer.
plain answers — no small print surprises later.
No. David Owl is software, published by C capital bv (KvK 82436665). It guarantees no returns — you stay responsible for every investment decision. David Owl / C capital bv is not a wealth manager and does not provide investment advice.
On your iPhone. Your portfolio data is stored in the app's private storage. Your broker API keys are stored in the iOS Keychain, protected by the Secure Enclave. There is no David server that knows your positions, and for now your fund configurations stay on your device too.
Bitvavo (EU) at launch, which means crypto to start with — more brokers and asset types follow. You connect with your own API key — directly, without an aggregator in between. You can request your broker from inside the app.
No. You buy each feature once and it's yours — no subscription, no recurring fee.
Rebalancing is a tool that helps you execute — it places market orders when you rebalance, and it needs the app open or active in the background. David is not a set-and-forget robot, by design: you stay in the lead.
Nothing happens to your money. Your assets sit at your broker, under your own account. David is a replaceable software layer on top — the broker relationship is yours, not ours.
Be your own pension fund.
coming soon to the App Store — you don't have to be a millionaire.