Paper PDF vs Harness Chat

Paper PDF is a streamlined PDF workspace for everyday document tasks. Scan paper documents, convert images into PDFs, merge multiple PDFs into one file, extract selected pages, annotate with pen and highlight tools, and compress files for easier sharing. Paper PDF helps you: Scan documents into clean PDFs Convert images from Photos or Files into a PDF Merge multiple PDFs into one document Extract selected pages into a new PDF Mark up PDFs with pen, highlight, and eraser tools Compress PDFs for storage and sharing Preview, share, and save documents to Files Paper PDF is designed to keep common PDF actions simple, focused, and local to your device.

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.