Mobile & AI Engineer

Creating
Mobile AI
Apps.

Full-stack developer and Mobile & AI engineer specializing in React Native, Python, and practical AI solutions. I build fast, reliable (mobile) apps with seamless AI integration.

View Projects
Based in The Netherlands
Mobile
iOS & Android
AI
Dev & Integration
Full Stack
React, RN & Python
Samuel Yost
AppBoost

AppBoost

Expo • React Native

Launch your mobile app in days.
Not months.

Production-ready Expo starter template with authentication, payments, database, push notifications, and a pre-built UI component library. Everything you need for iOS & Android.

Mobile App Template

RevenueCat Payments

Subscriptions, in-app purchases, free trials, and automatic restoration built-in.

Authentication

Secure user auth with email, social logins, and session management included.

Backend Ready

Pre-configured database and cloud functions ready to go.

Push Notifications

Complete setup with token management, permissions, and deep linking.

AI-Optimized

Context rules for Claude Code, Cursor, Windsurf, and GitHub Copilot.

RapidSubs

RapidSubs

React Native • Local ML

Professional AI subtitles.
On-Device AI. 100% Offline.

Cross-platform mobile app (iOS & Android) for automated video captions. Built with React Native, utilizing local AI models for fast, offline transcriptions.

13,000+ Downloads

Cross-Platform

Single codebase deployed to both iOS and Android with native performance.

On-Device AI

Uses local transcription models for instant subtitle generation. Your videos never leave your device.

FFmpeg Integration

Complex video processing and frame-perfect text overlay rendering.

Trendy Styles

Eye-catching subtitle styles optimized for TikTok, Reels, and YouTube Shorts.

Screen 1
Screen 2
Screen 3
Screen 4
Screen 5