If you're looking for another alternative to Storly.ai, StoryNest.ai is worth a look. This AI-powered tool is geared for storytellers who want to create stories, novels and interactive stories. It comes with tools for character creation and world-building, and AI-assisted editing for a variety of formats, including interactive fiction and educational content. You can try it out with a free account.
Another tool worth checking is NovelAI. This service uses AI for authorship and storytelling, letting you write literature without censorship or rules. It has character visualization, interactive fiction, a customizable editor and encrypted storage. NovelAI offers tiered pricing so you can use it for casual writing or more serious projects.
If you want something more interactive, check out HereAfter. This app is designed for recording and sharing stories and memories with family members. It's got guided prompts, conversational access to stories and photos, and encrypted authorized access. HereAfter is good for personal storytelling, and you can use it on any device, with flexible subscription plans depending on your needs.