<p>My app lets users photograph a rock, mineral or crystal and instantly get its identification and details using an AI vision model. Native SwiftUI iOS app launched in February 2025, monetized with weekly and monthly subscriptions (3-day trial) via RevenueCat. No ads.</p><p><b>Key highlights:</b></p><ul> <li>Annual revenue: $706 gross / $572 net proceeds (last 12 months)</li> <li>Lifetime gross revenue: $1,954 (2025: $1,478)</li> <li>MRR: $35 with 3 active subscriptions (Oct 2026 snapshot)</li> <li>Running costs: ~$5/month (OpenAI cost only $0.20 in 6 months + $5 VPS)</li> <li>US is the main market (~54% of proceeds)</li> <li>Same codebase pattern as Plant Identifier (bundle purchase possible)</li> </ul> <p><b>Team</b></p><p>Solo founder running a portfolio of 30+ apps. The app needs almost no time. No employees.</p><p><b>Tech Stack</b></p><p>Mobile: native Swift / SwiftUI, SwiftData, PhotosUI + AVFoundation camera, iOS 17.5+, localized in English, German and Turkish. Backend: NestJS (TypeScript), Prisma ORM, PostgreSQL, Docker on a Linux VPS. AI: OpenAI vision model (GPT-4o-mini). Other: RevenueCat + RevenueCatUI paywall.</p><p><b>Marketing and growth</b></p><p>Growth came from organic App Store search; no paid marketing. New-user acquisition is currently near zero, so current revenue comes from existing subscribers.</p><p><b>Revenue and profit</b></p><ul> <li>Gross revenue (12 mo): $705.96 from 136 transactions</li> <li>Net proceeds (12 mo): $572.38</li> <li>Average of last 3 months: $35 gross per month</li> <li>Pricing: weekly $3.99, monthly $9.99 (3-day trial)</li> </ul> <p><b>Return on investment</b></p><p>At $600 the price is about 1x last-12-month net proceeds. Restarting ASO or Apple Search Ads and adding an annual plan are the main levers to grow revenue in this hobby niche with high willingness to pay.</p><p><b>Startup assets</b></p><ul> <li>iOS app via Apple App Transfer (reviews and active subscriptions)</li> <li>Full source code: SwiftUI iOS app + NestJS backend</li> <li>RevenueCat project and paywall configuration</li> <li>App icon, design assets, store metadata and screenshots</li> <li>30 days of technical handover support</li> </ul> <p><b>Risks</b></p><p>New-user acquisition is near zero, so revenue from the 3 existing subscribers will decline without ASO or paid traffic. Identification depends on OpenAI (cost is negligible).</p><p><b>Summary</b></p><p>A clean SwiftUI rock and crystal identification app with almost zero running costs, priced at ~1x annual net proceeds. Ideal for a buyer who can drive ASO or paid search, or who wants to bundle it with Plant Identifier. Numbers are from RevenueCat and can be verified live.</p><p>✅ $706 in ARR</p><p>✅ 3 customers</p><p>✅ Business model: SaaS</p><p>✅ Built with TypeScript, SwiftUI</p>