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Lullaby's calming home screen blends Dappier powered AI assistant, tech stack descriptions, and with a built with Bolt badge.
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AI Generator section to generate stories, lullabies, sleep sounds, subliminals and affirmations and convert it into speech.
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Content Library Section that allows user to directly play and sleep comfortably.
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AI Therapist section powered by Tavus with modern sleek design and interface. Choose between 5 therapist and multiple languages.
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Pricing Section that offers 3 different tiers, Free Tier, Dreamy Nights Tier and most recommended and userful Deep Sleep Tier.
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Account section to manage your subscriptions, favourites library, Downloads and Saved Stories. Save your generated content and access here
Inspiration
There are times when I have to work on a project whole night long. That disturbs my sleep cycle and it takes my days and even weeks to fix it. So I came up with an idea to make a sleep companion to help people sleep comfortably without any stress or anxiety. Generating stories and lullabies was not enough so i thought to integrating an AI therapist that helps people overcome their stress, anxiety, any kind of trauma with the ease of being at home and without feeling uncomfortable to speak about anything.
Sleep is a silent epidemic — it is not just me but over 60% of people struggle to fall or stay asleep due to stress, overthinking, or anxiety. I wanted to create something more than just another sleep tracker — a truly personalized, emotional companion that helps people unwind, heal, and find peace before bed.
What it does
Lullaby is an AI-powered sleep companion that delivers personalized bedtime experiences. It generates custom stories, subliminals, affirmations, and sounds based on user input and according to their preference like age, theme, and language. It includes: ElevenLabs Text To Speech for ultra-realistic, multilingual audio Dappier-powered sleep assistant for real-time guidance
Tavus powered AI video therapy to relieve emotional stress, anxiety and trauma to overcome them and sleep peacefully.
How we built it
For Frontend and backend implementation, I used Bolt. It provided me with sleek, smooth calming UI with ability to switch between Light mode and Dark Mode. For Content Generation: Gemini 2.5 Flash Model API For Text To Speech: ElevenLabs API for dynamic voice generation AI Assistant: Dappier SDK for contextual, conversational support Storage: Firebase + Supabase for asset hosting Authentication: Firebase Authentication Video Therapy : Tavis AI with LLM-driven support
For Payment System: RevenueCat (sandboxed)
Challenges we ran into
Failing to Integrate Revenuecat web SDK. I went through the documentation and fixed it manually. Failing to get ElevenLabs Creator tier, but got help from Bolt discord.
Time management: I had to prioritize must-have features over dream scope.
Accomplishments that we're proud of
Built and deployed a full working prototype. Integrated multiple AI services into a seamless, calming user flow Created a user experience that feels genuinely comforting, not clinical
Supported accessibility and multilingual inclusivity from the start
What I learned
I learned about different technologies such as RevenueCat, Dappier, ElevenLabs and it was fun learning their capabilities and implementing them into the project.
🚀 What's next for Lullaby Adding wearable integration for sleep tracking and insightful analysis and feedback loops. Integrating marketplace to offer everything that one requires for a peaceful and comfortable sleep. Expand to neurodiverse and pediatric sleep therapy.
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