Erika Kullberg’s apps

Invest for Your Child App

Help parents start saving and investing for a child from birth and stay consistent.

Opens a custodial account and keeps a parent contributing to it for eighteen years, which is the hard part. It shows the child's balance in terms a parent cares about rather than as a fund code.

What a v1 does5 features
  • A custodial account opened through a broker partner
  • Automatic monthly contributions from birth
  • Grandparents and family able to contribute directly
  • Progress shown against what it might fund - a deposit, tuition
  • The handover process explained before the child turns eighteen

The market

Proven marketKids and family money
6.5M usersat Greenlight, managing $2B on behalf of children

GoHenry filed €36.4M of revenue in 2021 before Acorns acquired it. Parents pay monthly in this category with little resistance, which supports $9 a month.

Where these numbers come from
CompanyEarnsReachSource
Greenlight$2B managed by kids6.5M+ usersCompany-stated, 2024
GoHenry€36.4M revenueNot publishedFiled accounts, 2021. Acquired by Acorns in 2023
Acorns EarlyPart of Acorns' $400M+14M+ Acorns customersIndependent estimate, 2025

Why this audience

A large part of this audience is parents who intend to start something for their children and have intended it for two years. The content raises it directly. Opening the account and automating the contribution removes the friction that keeps the intention an intention.

Before it can launch

  • Custodial UGMA/UTMA accounts through a broker partner; COPPA the moment the child logs in

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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