Erika Kullberg’s apps

ETF Investment App

Beginner-friendly ETF education, selection guidance, and investing plans.

Explains ETFs to somebody starting out and then lets them act on it, without ever naming the fund to buy. It teaches the questions - cost, index, domicile, spread - and shows the answers for whatever is being considered.

What a v1 does5 features
  • Plain explanations of what an ETF is and what its costs are
  • Side-by-side comparison of any funds the user picks
  • Fees shown as money over a decade, not as a percentage
  • Education first, buying through a broker partner second
  • No recommendations, and it says so

The market

Proven marketMicro-investing
$400Ma year at Acorns, from 14M customers

Acorns is the evidence that a subscription rather than trading commission can carry a consumer investing product, with over $30B invested since inception. This is costed at $9 a month.

Where these numbers come from
CompanyEarnsReachSource
Acorns$400M+ annual revenue, 202514M+ all-time customers · $30B+ investedIndependent estimate
Stash$37.5M Series D raisedNot publishedAnnounced funding
Greenlight$2B managed by kids6.5M+ usersCompany-stated, 2024

Why this audience

These viewers are beginner investors who have been taught to ask about fees, index and structure rather than to chase picks. That education makes them unusually good customers for a tool that explains rather than recommends. They want to choose well, not be told what to choose.

Before it can launch

  • Naming which ETF to buy is advice. Either RIA registration, or education plus a broker partner and no recommendations

What it earns

Drag me Every figure recalculates as you go.

Paying users1,000

0.0047% of 21.2M followers · capped at 50,000

Price per month$9

Opens on the price this idea was costed at, $9.

1,000 paying — 0.0047% of 21.2M followers — × $9 a month = $9,000 a month

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Revenue a month$0123456789,012345678901234567890123456789
Over twelve months$012345678901234567890123456789,012345678901234567890123456789

Fifty thousand paying users is the ceiling every one of these pages is drawn against, not a forecast. It opens at a thousand, the bottom of the range, so the first figures you see are the modest ones. What the cap buys is comparability: the same range on every app, and the percentage of the audience it takes as the number that moves.

Is this the one for your audience?

We fund it, build it, and run it. You bring the audience and take a share of the revenue. Nothing to pay and nothing to build.

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