Since you asked to "prepare a paper," you are likely looking for a companion tool to design or track your progress. Here are the best options:
Many players use the Dungeon Maker Wiki to reference difficulty unlocks and character builds when "preparing a paper" strategy guide for their own runs. PaperDungeonMaker by 0x72
Be cautious with "Mod APK" versions from third-party sites, as they often contain malware or can lead to account bans. Official versions ensure you get updates for features like Story Mode and Dark Lord unlocks safely. Preparing Your Paper (Planning Tools)
To get started with your project, you'll need the right tools for both the game itself and the "paper" planning component you mentioned.
For the core gameplay, you can download from official app stores like Google Play or the Apple App Store.