AI APP · CASE STUDY

baba

Context-aware Hebrew translator — not a dictionary lookup, but a system that understands register, gender, and formality.

ZipLyne designed and shipped a full cross-platform product: web app, iOS and Android apps, and a Chrome extension that injects into any webpage. Under the hood, 11 gender/formality prompt variants handle Hebrew's grammatical complexity through an OpenRouter multi-model backend on Cloudflare Workers — with ElevenLabs TTS for native-speaker pronunciation on every result.

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[ WHAT WE BUILT ]

Four platforms. One system.

Cross-Platform Product
Web · iOS · Android · Chrome

One codebase on Expo spanning iOS (App Store) and Android (Google Play). Separate React web app. Chrome extension that translates selected text in-place without leaving the page.

Hebrew Grammar Engine
11 Variant Prompt System

Masculine/feminine × formal/informal combinations, each with tailored system prompts. Context detection routes every query to the correct variant before hitting the LLM — no post-hoc correction.

Backend Architecture
Cloudflare Workers + OpenRouter

Worker handles routing, rate-limiting, and model selection. OpenRouter provides multi-model fallback — if the primary model rate-limits, traffic fails over automatically. Zero cold starts.

Voice Pronunciation
ElevenLabs TTS

Every translation surfaces a playback button. ElevenLabs streams native-quality Hebrew audio on demand — no pre-recorded files, no static dictionary clips.

[ AI & TECH ]

The AI chain.

STEP 01
CONTEXT DETECTION

User input parsed for gender cues, register signals, and explicit formal/informal preference.

STEP 02
VARIANT SELECTION

One of 11 gender/formality prompt templates selected and injected with the query.

STEP 03
OPENROUTER → LLM

OpenRouter routes to primary model with automatic fallback. Returns Hebrew + transliteration + usage notes.

STEP 04
ELEVENLABS TTS

Hebrew output piped to ElevenLabs for native pronunciation audio, streamed to client on demand.

[ STACK ]

What it runs on.

Cloudflare Workers
Backend / routing
OpenRouter
Multi-model fallback
ElevenLabs
TTS / voice
React
Web app
Expo
iOS + Android
Chrome Extension APIs
In-page injection
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