Erika Kullberg’s apps

Parent Wealth Planner

Long-term financial planning for parents and children's savings and investments.

The family's long-term money in one plan: retirement, the children's savings and education, and how they compete. It shows what funding one properly costs the other.

What a v1 does5 features
  • Retirement and children's savings modelled together
  • Education costs projected to the year they land
  • Trade-offs shown explicitly rather than assumed away
  • Custodial accounts through a broker partner, 529 plans by referral
  • Reviewed annually as income and family change

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 $10 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

This audience is planning for a family rather than a person: retirement and the children's future competing for the same income. The content addresses family planning directly. Modelling the trade-off explicitly is the conversation they are already half-having.

Before it can launch

  • Custodial accounts through a broker partner. 529 plans are state-administered, so those stay referral-only

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$10

Opens on the price this idea was costed at, $10.

1,000 paying — 0.0047% of 21.2M followers — × $10 a month = $10,000 a month

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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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