BookGPT vs HammerAI

BookGPT helps you explore books through character-first AI conversations. Enter a book title, discover key characters, pick one, and start chatting in their voice and worldview. Before each chat, BookGPT generates a visual portrait inspired by the book context, so every conversation feels personal, vivid, and immersive. What you can do: Search by book title and open a character list fast Choose a character and start a focused 1:1 chat session Get an AI-generated character portrait before entering chat Continue conversations with context-aware replies Enjoy a clean, reader-first experience designed for depth, not noise Who it’s for: Readers who want to engage more deeply with stories Book club members who want a new way to discuss characters Literature fans who enjoy roleplay-style exploration Subscription: BookGPT is a paid app with subscription access. Product options and trial details (if available) are shown clearly on the paywall before purchase. You can restore purchases anytime. Important notes: Responses and portraits are AI-generated and may include inaccuracies BookGPT is for creative and educational use BookGPT is not affiliated with, endorsed by, or sponsored by publishers, authors, or rights holders Users are responsible for how generated content is used or shared Terms of Use: https://cool-mall-f57.notion.site/Terms-of-Use-30efd7ddf43180418ddce5747bdff1cc Privacy Policy: https://cool-mall-f57.notion.site/Privacy-Policy-30efd7ddf4318004a362de2eb9a07ca9?t=new

Chat with thousands of AI characters, roleplay your own stories, generate images, and hear characters speak. HammerAI is the private AI roleplay and character chat app: free to chat, no ads, no tracking, and your chats and characters can stay on your device. THOUSANDS OF AI CHARACTERS Browse community-created characters across every genre: fantasy, sci-fi, romance, horror, comedy, and more. Each has a unique personality, backstory, and conversation style. Create your own AI characters from scratch or import them. AI ROLEPLAY & CHARACTER CHAT Immersive roleplay conversations with AI characters that remember context and stay in character. Set up your own persona so characters know who they're talking to. Characters have their own voice, and you can choose from over 300 AI voices in multiple languages. GROUP CHATS Add multiple AI characters to the same conversation. Watch them interact with each other and with you. Each character maintains their own personality. STORY WRITING Co-author stories with AI. Build worlds with lorebooks that define your world's lore, history, and rules so the AI stays consistent across long narratives. You can also generate images for your stories. IMAGE GENERATION Generate character portraits, scenes, and illustrations with dozens of AI art models including Flux, Stable Diffusion, and more. TEXT-TO-SPEECH Over 300 AI voices in multiple languages. Give each character their own voice. CHOOSE YOUR AI MODEL Most AI chat apps lock you into a single black-box model. HammerAI lets you pick from leading open-source LLMs tuned for roleplay and storytelling: Mythomax, Hermes, Mistral, Lumimaid, Magnum, Euryale, WizardLM, and more. Try a few, find your favorite, or let HammerAI pick a sensible default. Want to dial it in further? Adjust temperature, context window, and system prompt to match your style exactly. Not finding the LLM you want from our options? Use any LLM in the world with our proxy LLM support. PRIVATE BY DESIGN Most AI chat apps store every conversation and character on their servers. HammerAI gives you the choice: keep your chats and characters local on your device, or sync them to the cloud if you prefer. Either way, we never run ads and never sell your data. WHY HAMMERAI? • Free to chat: no ads, no trackers • Private: chats and characters can be saved locally on your device • Thousands of AI characters: community-created, growing daily • Group chats: roleplay with multiple AI characters at once • Story mode: co-author interactive fiction with AI • Image generation: dozens of AI art models including Flux, Stable Diffusion, and NovelAI • 300+ AI voices: text-to-speech in multiple languages • Lorebooks: world-building that the AI remembers • Custom personas: be whoever you want • No account required: start chatting immediately BUILT BY ONE DEV HammerAI is a passion project built by a single developer with help from a small contracting team. No venture capital, no growth team, no engagement metrics to optimize against you. Every dollar from a subscription goes back into server costs, better AI models, and continued development. You're supporting indie software made by someone who actually uses it. Download HammerAI today. Roleplay an epic fantasy, write a sci-fi novel, brainstorm with a creative partner, or just see where the chat takes you. Your library is yours: what fills it is up to you.