The latest articles on Forem by Hüseyin Sarı (@huseyinsari). https://forem.com/huseyinsari https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3735988%2F0082fba6-5c35-4d29-b615-8c256441f90e.png https://forem.com/huseyinsari en Hüseyin Sarı Tue, 27 Jan 2026 20:14:04 +0000 https://forem.com/huseyinsari/i-built-an-ai-spam-blocker-app-as-an-indie-developer-nospampro-2599 https://forem.com/huseyinsari/i-built-an-ai-spam-blocker-app-as-an-indie-developer-nospampro-2599 <p><strong>Why I Built NoSpamPro</strong></p> <p>Like everyone else, I was tired of scam calls, betting SMS, and fake promotions. Important messages were getting buried under spam, and unknown callers were constantly interrupting my day.</p> <p>Instead of just complaining, I decided to build a solution.</p> <p><strong>What is NoSpamPro?</strong></p> <p>NoSpamPro is an AI-powered spam SMS and call blocking app designed to be:</p> <ul> <li>Fast</li> <li>Offline-first</li> <li>Privacy-friendly</li> </ul> <p>The main goal is simple: stop spam without collecting user data.</p> <p><strong>Privacy-First by Design</strong></p> <p>Most spam blocker apps rely on cloud servers to analyze messages and calls. That means your personal data may leave your device.</p> <p>I didn’t like that idea.</p> <p>NoSpamPro follows a privacy-first approach:</p> <ul> <li>Core detection works offline</li> <li>No personal data is uploaded</li> <li>No account or subscription required</li> </ul> <p>Security should not be sold.</p> <p><strong>How It Works (Simplified)</strong></p> <p>NoSpamPro uses a hybrid detection system:</p> <ul> <li>Lightweight on-device AI models</li> <li>Rule-based spam filtering</li> <li>Keyword and pattern detection</li> </ul> <p>This allows the app to detect spam without heavy cloud processing.</p> <p><strong>Current Features</strong></p> <ul> <li>AI-powered spam SMS detection</li> <li>Automatic call blocking for suspicious numbers</li> <li>Offline detection engine</li> <li>Multi-language support (EN, TR, ES, PT, HI, RU, DE, ZH, FR, ID, TH, KO, AR)</li> <li>Completely free to use</li> </ul> <p><strong>Challenges I Faced</strong></p> <p>Building an AI-powered mobile app as an indie developer is not easy:</p> <ul> <li>Performance vs accuracy trade-offs</li> <li>Battery and CPU optimization</li> <li>Platform limitations (especially iOS)</li> <li>Fighting false positives</li> </ul> <p>But shipping a real product taught me more than any tutorial.</p> <p><strong>What’s Next</strong></p> <p>I’m working on:</p> <ul> <li>Better on-device AI models</li> <li>Community-driven spam pattern sharing (privacy-safe)</li> <li>Performance optimizations</li> <li>Researching iOS limitations and possible solutions</li> </ul> <p><strong>Lessons Learned as an Indie Developer</strong></p> <ul> <li>Ship fast, then iterate.</li> <li>Privacy is a strong product differentiator.</li> <li>Users love simple and free security tools.</li> <li>Distribution (ASO, SEO, communities) matters as much as coding.</li> </ul> <p><strong>Final Thoughts</strong></p> <p>NoSpamPro is my attempt to fight spam and digital harassment with AI.</p> <p>If you’re interested in mobile AI, privacy, or indie development, I’ll share technical deep dives, growth experiments, and mistakes here.</p> <p>Thanks for reading!</p> <p>— Hüseyin Sarı</p> android ai security privacy