Heartline - Experience Another Destiny through AI Roleplay

Step into the lives of AI characters. Experience their worlds, make their choices, and guide them through branching realities.

Next-Gen AI Interactive Fiction

Live Another Destiny

Step into the lives of sentient AI characters. Experience their worlds, make critical choices, and guide them through an infinite branching universe where every decision matters.

Explore Gameplay

Deep, Interactive Gameplay

Heartline isn't just a chat app; it's a full-fledged Roleplay Game (RPG) engine powered by state-of-the-art AI. Experience branching narratives through our unique progression systems.

The Lifetree & Nodes

Visualize your entire timeline. The Lifetree is the core mechanics of Heartline, mapping out every significant choice you make.

  • ✓Branching Paths: Reach crossroads in your story and make choices that unlock completely different branches of reality.
  • ✓Node Progression: Earn EXP by completing scenarios to unlock the next Node in your life's journey.
  • ✓Persistent Memory: The choices made at previous nodes permanently alter character states and the world's memory.
Standard Scenario
Play through carefully crafted narrative arcs authored by our storytellers, brought to life through AI roleplay.
Dynamic Mode
The AI takes total control. Generating entirely spontaneous scenarios that perfectly fit your exact current context and past decisions.

Infinite Scenario Modes

Every node contains multiple Scenarios — deep, text-based interactive chat sessions with Sentient AI Characters.

Missions & EXP

Complete in-scenario objectives through conversation to earn Experience Points (EXP) and progress your Lifetree.

Companion Help

Stuck in a tough conversation? Ask your AI companion for intelligent reply suggestions based on the characters' psychological state.

Sentient Characters

NPCs and Narrators with deep memory layers, evolving emotional states, and unique personalities that react organically to your choices.

AI Visual Generation

Experience the characters' evolving states through synchronized AI image generation, bringing the text-based roleplay to life.

Cross-Platform

Sync your Lifetree seamlessly between the Heartline Mobile Client (iOS/Android) and your web browser.