Builder

What
it
does

Build your own fund

With the Builder you compose your own fund from the assets on your broker. You decide the assets and their weights; David places the orders you choose to make. No asset manager taking a slice of your returns, no black box.

Your portfolio data and broker API keys never leave your device. David Owl has no server that knows your positions.

Who it's for

For self-directed investors who want to take their long-term wealth into their own hands — entrepreneurs who want to act fast, and dual-income couples who want a grip on their pension build-up without the cost of managed investing.

How
it
works

How it works

Connect your broker with your own API key — it stays on your device. Build your fund by adding assets and setting the weights that fit your strategy. Then activate, and David places the orders and helps you keep the fund on track, on your moment.

What's already inside

Compose it yourself — pick assets from your broker and give each position a preferred weight, with a minimum and maximum.
Cash allocation — decide how much of your portfolio stays in cash.
Activate with one confirmation — David places the orders through your broker (market or limit, with adjustable slippage). You see and confirm every activation.
Rebalancing as a tool — pick your rebalance moment and David helps you bring the fund back to your target weights, no manual calculating required.
Unlimited funds — build as many funds as you like.
On your device — fund configurations and broker API keys are stored locally (iOS Keychain, Secure Enclave).

At launch connected to Bitvavo. More brokers will follow based on user feedback.

0.15–0.35%

yearly cost of a passive ETF

1.30–1.62%

average yearly cost of Dutch asset management

Features

Available

Fund constructor

Compose your own fund from the assets on your broker — pick assets, set weights, and rebalance on your moment.

Build your own fund from the assets on your broker
Set a target weight per position; rebalancing brings each position back to that target, on your moment
Unlimited funds
Manual rebalancing via market orders
Your data stays on your device (iOS Keychain)

Roadmap

Advanced order execution

More control over how your orders are placed.

Limit orders
Liquidity sizing

UPGRADESFund constructor

Roadmap

(Semi-)Automatic rebalancing

A tool that helps you rebalance — setup an interval, get a reminder! Helps you execute your rebalances on time, no automated trading.

Semi-automatic: David prepares the rebalance; you confirm and run the execution in the app

UPGRADESFund constructor

You ask

We answer

How do I assemble my own fund?

You pick the assets from your broker account, give each position a weight and place the orders yourself via market orders. In David you do this in the Builder: select assets, set weights, execute.

What does rebalancing mean and how often should you do it?

Rebalancing returns your weights to the target split after prices have shifted them. How often is a personal choice; ETF's often balance monthly, many people review quarterly or only when the drift is large. David prepares the rebalance and lets you confirm the execution; the app never trades on its own.

Does David trade automatically for me?

No. David prepares the rebalance, but you confirm and execute the order yourself. There is no automated trading.

How many funds can I create?

Unlimited. You can build as many funds as you like.