How to Launch a Mental Health App: Lessons from BeReal, Locket, and Gas

Gas hit #1 in the App Store and made $1 million in 3 months. BeReal became the most downloaded app in 2022. Locket turned widget photos into a social phenomenon.

None of them used traditional advertising. So how did they do it—and what can mental health app founders learn?

The Nikita Bier Playbook

Nikita Bier is the closest thing consumer apps have to a growth hacker legend. He co-founded TBH (sold to Meta for $30M+) and Gas (sold to Discord). He's advised BeReal, Locket, and dozens of other viral apps.

His core insight: consumer apps grow through word-of-mouth or they don't grow at all.

Here are his key principles:

1. Optimize for the Aha Moment in Seconds

"With attention spans shrinking, it's critical to demonstrate your core value to users within the first three seconds of using an app."

Gas did this brilliantly: you download, immediately get questions about your friends, and quickly receive anonymous compliments. The value is obvious and immediate.

Mental health lesson: Most therapy apps start with 15-minute onboarding questionnaires. By the time users get to the actual value, many have already bounced. What if you could deliver a moment of genuine support in the first 30 seconds?

2. Target Demographics with High Social Velocity

"The number of invitations sent per user drops 20% for every additional year of age from 13 to 18."

Teens talk to each other constantly. They share discoveries immediately. Adults take months to recommend something to a friend.

Mental health lesson: This doesn't mean targeting 13-year-olds (that brings serious ethical concerns). But it does mean thinking about who talks to each other about mental health. College students? Young professionals in high-stress jobs? Find communities with high communication density.

3. Look for Latent Demand

"Look for existing user behaviors that are being done in a very inefficient way."

BeReal noticed people were tired of curated Instagram perfection. The behavior (sharing authentic moments) existed—BeReal just made it easier.

Mental health lesson: People are already processing emotions—through journaling, voice memos, texts to friends at 2AM. What existing behavior can you make 10x easier?

4. Word-of-Mouth Must Be Built Into the Product

Gas didn't just encourage sharing—it required it. You couldn't use the app without inviting friends. The product was the distribution channel.

Mental health lesson: This is tricky for mental health. You don't want to require people to publicly announce they're struggling. But consider: peer support features, challenges with friends, community elements. The product should have natural reasons to bring others in.

5. Go Hyperlocal First

Both TBH and Gas launched school-by-school, not globally. They'd saturate one high school before moving to the next. This created density—everyone at the school was using it simultaneously.

Mental health lesson: Consider targeting specific communities: one university, one company, one online community. Depth beats breadth in early growth.

BeReal's Specific Tactics

BeReal grew through several unconventional strategies:

• Limited time window: The random daily notification created urgency and FOMO
• Anti-Instagram positioning: Clear enemy, clear differentiation
• Campus ambassador programs: Real people spreading the word offline

As Marketing Brew reports, BeReal is now exploring "offline opportunities to engage users in places like college campuses, where it hopes to recreate the success it saw among student interest."

Mental health lesson: Can mental health be social without being performative? BeReal proved authenticity can be shareable. Mental health apps could explore peer accountability, shared challenges, or community check-ins that don't require vulnerability theater.

Why Most Mental Health Apps Fail at Growth

Traditional mental health apps violate almost every principle above:

• Slow to value: Long onboarding, no immediate payoff
• No social mechanics: Designed for isolated use
• Stigma barrier: People don't want to publicly recommend "anxiety apps"
• Low retention: Users download, use once, forget
• Generic targeting: Marketing to "people with anxiety" is too broad

This is why mental health app marketing has historically relied on expensive paid acquisition—which doesn't work for consumer products long-term.

What Mental Health Viral Growth Could Look Like

Imagine a mental health app that:

• Delivers value in 30 seconds: You open it, say how you're feeling, and immediately get something helpful—not a questionnaire
• Has natural share triggers: Weekly summaries you can share, achievements that don't feel cringe, community challenges
• Targets specific communities: Launch with one anxious profession (med students? junior lawyers? startup employees?) and dominate
• Makes support social: Peer accountability, friend check-ins, shared progress—without requiring public vulnerability

The Durability Problem

Here's the uncomfortable truth Nikita admits: "Creating durable consumer social products is extremely difficult... a 'black swan event' that happens maybe once a decade."

BeReal's growth has stalled. Gas was sold and shut down. TBH was shut down. Going viral is achievable. Staying viral is nearly impossible.

For mental health apps, this might actually be okay. The goal isn't entertainment—it's genuine help. An app that helps someone through a difficult period and then fades from their life has still succeeded.

The business model needs to account for this: value doesn't come from endless engagement, but from genuine impact during the moments that matter.

What We're Learning at Stella

We study viral apps obsessively—not to copy mechanics, but to understand psychology:

• Immediate value: Stella starts talking to you immediately. No onboarding questionnaire.
• Voice-first: The most natural interface. No typing required.
• Memory: Every conversation builds on the last. You're not starting over.
• Targeted launch: We're focused on specific communities, not "everyone with anxiety."

We don't expect to go as viral as Gas. Mental health is different. But we can learn from what works—and build something that spreads because it genuinely helps.

Stella is designed for natural word-of-mouth: you'll tell your friends because it actually helped, not because we forced you to invite them. Try it free.