How two brothers made $85K in 8 months with a breathwork app

Executive overview

Most app founders build first, then scramble for users. Jack and Nick Sweeney reversed the order: they made content about breathwork until a tweet went viral, then built the app around what the market had already validated.

The result was $85K in revenue across 8 months, with no external funding and ~50% margins.

Validate with content before writing a single line of code.

The content-first validation process

• Start by posting about a painful niche you genuinely care about — find the ideas that get traction
• Use X as an idea battleground; a viral post signals real demand
• Repurpose winning X posts into short-form video scripts for Instagram and TikTok
• Escalate winners to longer formats (YouTube) as confidence grows
• Only after content validates demand: build the product

Five-step playbook for finding an app idea

1. Pick a painful niche — make content about a real problem, not a manufactured one
2. Batch ideas weekly — position yourself as a solution through consistent posting
3. Film in bulk — produce 30–60 short videos at once; aim for two months of content upfront
4. Amplify your winners — put paid spend (Meta ads, Spark) behind content that already converts organically
5. Out-market everyone — post daily, hire clippers, use whatever resources you have

Building the app

• MVP built using Cursor (AI coding); no traditional coding by the content co-founder
• Stack: React Native Expo, Supabase, Claude/Codex agents, Mixpanel, RevenueCat, Vercel/Next.js
• Built from validated idea to launched MVP in a matter of weeks, not months

Pricing and unit economics

• Subscription model: $10/month or $40/year (with 3-day free trial on annual plan)
• Monthly revenue: ~$11K average; peak $22K
• Total monthly costs: ~$5–6K (editors $2.5K, influencers $1–2K, ghostwriter $800, VA $500, tools ~$500)
• Operating margin: ~50%

Key content insight

• The breakout piece — a "Vortex Breath" video — reached ~8 million views across platforms
• Framing matters: polarising hooks ("do you want to know something they don't want you to know?") drive reach
• One viral video was filmed four times because the creator thought it was bad — ship anyway