PromptCodex vs Harness Chat

PromptCodex is your personal AI prompt library. Create, organize, and reuse prompts for ChatGPT, Claude, Gemini, Copilot, Perplexity, Grok, and DeepSeek — all from one app. ORGANIZE YOUR WAY Build a structured library with folders, categories, tags, and projects. Nest folders up to five levels deep. Pin favorites for quick access and archive what you don't need. DYNAMIC VARIABLES Add placeholders like {topic} or {tone} to any prompt. Choose from text, dropdown, toggle, and date inputs — one prompt adapts to many uses. PROMPT VARIANTS Save multiple versions of each prompt. Compare, refine, and keep what works best. EXPLORE & LEARN Browse 1,000+ curated sample prompts by category. Import any prompt into your library with one tap. TRACK YOUR USAGE View copy counts, growth charts, and rankings for every prompt. PRIVACY FIRST All data stays on your device. No account required. No uploads. Works fully offline. Optional iCloud sync available. Lock with Face ID or Touch ID. Export and import your library as JSON. Supports iPhone and iPad. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Harness Chat is a beautifully simple AI chat app where you bring your own key. The app is free. You pay nobody but the models themselves: paste your OpenRouter API key (two minutes, guided in-app) and chat with hundreds of AI models — DeepSeek, MiniMax, Claude, GPT, Gemini, and more — at raw API prices. No subscription, no markup, no middleman. NO ACCOUNT NEEDED Signing in with Apple or Google is completely optional — it exists only to sync your chats and memory between your phone and the web/desktop app. Skip it entirely and everything stays on your device: your key, your chats, your business. PRIVATE BY DESIGN Because you're billed at the API level, your conversations fall under model providers' API data policies — not used to train models, unlike free consumer chatbots. No ads, no tracking, no analytics. If you do sign in, you can export everything we hold — every chat and memory — as one JSON file, anytime. WHAT IT DOES • Real tools: web search, plus files you can actually download — PDFs, spreadsheets, presentations, even small apps and games • Automatic memory (signed in): it learns your preferences across chats • Optional sync: chats follow you between phone and web when signed in • On-device models: download a small model and chat entirely offline, free • Effort control, live cost tracking, and your context usage at a glance A free OpenRouter account and API key unlock cloud models; on-device models need nothing at all.