/Companies

Joon Health

YC W22

San Francisco, US · Founded 2021 · 10 employees · 14 known investors

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Joon is a mobile app that helps children ages 6-12 build executive functioning and positive habits through gamified task management, targeting parents seeking to reduce behavioral friction around chores, homework, and daily routines.

Also known as Joon · Joon App, Inc.

Founders & leadership· Y Combinator alumni (W22)

Joon Health was founded in 2021 by Isaac Eaves, Brad Brenner, and Kevin Bunarjo.

IEIsaac Eaves
Isaac EavesFounderHe holds degrees in Computer Science and Business Administration from UC Berkeley and leads the company's product and strategy.
BBBrad Brenner
Brad BrennerFounderBrad Brenner co-founded Joon Health in 2021 alongside Isaac Eaves and Kevin Bunarjo, where he serves as Chief Operating Officer overseeing operations, product development, user research, and growth initiatives. He holds a degree in Business Administration from UC Berkeley and is originally from Romania.
KBKevin Bunarjo
Kevin BunarjoFounderKevin Bunarjo holds degrees in Computer Science and Business Administration from UC Berkeley. He works as an engineer at Joon Health, focusing on using game mechanics to support children's productivity and engagement.

Investors · 14

Avlok CapitalreportedLynnwood

How we know: Y Combinator's founder network · Not right? Tell us

BrickyardreportedNew York · $500K – $800K

How we know: the VCSheet dataset · Y Combinator's founder network · Not right? Tell us

Dune VenturesreportedMiami · $1M – $3M

How we know: a partner's Signal profile · Not right? Tell us

WefunderreportedSan Francisco

How we know: Y Combinator's founder network · Not right? Tell us

Funding

SEC filings, press & company announcements

Source: company announcements and press reports — follow each round's link for the claim.

Company profile

researched Aug 2026

Joon Health (legal entity Joon App, Inc.) operates a pediatric behavioral health platform built around paired parent and child mobile applications. The child-facing app uses an AI pet companion that reminds children of daily chores and routines and keeps them motivated through game mechanics, while the parent-facing side provides organization tools, insight into what may be affecting their child, intervention strategies, and personalized recommendations based on the child's interests. The stated aim is to establish consistent household routines and build longer-term life skills such as independence and self-directed task completion.

Beyond the apps, the company offers a tiered support model: families can start independently with the apps, add on-demand parent coaching, and be referred to in-network therapists or integrated therapy for more complex challenges. The clinical program is directed by Dr. Joe Raiker, Director of Clinical Strategy, described as a child psychologist with 50+ publications and 3,000+ citations, a former Chair of an ADHD Special Interest Group, a CHADD Young Scientist Research Award recipient, and previously a behavioral scientist at Twill (acquired) and an associate professor at Florida International University. Joon Certified Coaches are recruited and trained by Dr. Raiker, and the company states that nearly all coaches are licensed therapists or hold a master's or advanced degree. Coaching is offered in session-based or asynchronous formats.

User testimonials on the company's site reference children with ADHD, autism spectrum disorder, and oppositional defiant disorder, and cite uses spanning chores, morning routines, homework and other focus tasks.

Business model

Consumer-facing digital health service: free sign-up for the parent and child apps, with additional layers of paid-style support including on-demand parent coaching, session-based or asynchronous coaching programs, and referrals to in-network therapists for integrated therapy.

Free entry point through the parent and child apps, with coaching (on-demand, session-based or asynchronous) and access to integrated therapy or in-network therapist referrals as additional services.

Traction

The company reports supporting more than 1 million families and a 4.8/5 rating from over 6,000 families. It publishes an eight-week observational study reporting, based on parent reports, a 30% reduction in disruptive behaviors, 73% reporting reduced arguments with their children, 89% finding Joon easy to use, and 90% enjoying it and willing to recommend it. A randomized controlled trial comparing Joon with an attention control on behavior, executive functioning, parenting stress and internalizing symptoms over eight weeks is also described.

▸Full profile — market position, technology, go-to-market

Market position

Positions itself as a complete pediatric behavioral health platform spanning self-directed app use, parent coaching and clinical therapy access.

Combines a gamified child app in which the game itself is the reward with a clinically directed support stack (coaching network trained by an in-house clinical psychologist and therapist referrals), and cites its own observational study and a randomized controlled trial comparing Joon to an attention control condition.

Technology

Mobile parent and child applications using game mechanics and an AI pet companion that prompts children about daily chores and sustains motivation, plus personalized recommendations generated from a child's interests and intervention strategies surfaced to parents.

Go-to-market

Direct-to-parent acquisition via a free app sign-up on its website, supported by press features and parent reviews/testimonials, with escalation paths into coaching and therapy.

Parents and families of children — the company's observational study focuses on children aged 6 to 12 — including families of children with ADHD, autism spectrum disorder and oppositional defiant disorder.

Compiled by commissioned research from 1 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
Average app ratingJan 20254.8 out of 5
Families supportedJan 20251,000,000 families
Parents finding Joon easy to use (observational study)Jan 202589%
Parents reporting reduced arguments with their children (observational study)Jan 202573%
Parents who enjoyed Joon and would recommend it (observational study)Jan 202590%
Reduction in disruptive behaviors (parent-reported, 8-week observational study)Jan 202530%

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

Related companies · 10

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Companies working in the same space as Joon Health.

▸Research sources · 1

primary sources listed

1 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Joon Health do?
Pediatric behavioral health platform pairing gamified child/parent apps with parent coaching and therapist referrals.
Who founded Joon Health?
Joon Health was founded by Isaac Eaves, Brad Brenner, Kevin Bunarjo in 2021.
Who are Joon Health's investors?
Joon Health's investors include Blue Lion Global, Cathexis Ventures, CSVE Venture Partners, Founders, Lobster Capital, MaC Venture Capital, Y Combinator, Avlok Capital and 6 more.
Where is Joon Health headquartered?
Joon Health is headquartered in San Francisco, US.