All the Features,
Zero Compromises
From on-device AI story generation to neural narration and offline mode, Sleepy Spell is built to delight kids and give parents peace of mind.
AI Story Generation
Unique, original stories created in seconds -- right on your device.
On-Device AI Engine
Powered by a compact language model running entirely on your device. No cloud, no latency, no data sharing.
400-600 Words Per Story
Each story is the perfect length for bedtime -- long enough to engage, short enough to wind down before sleep.
Ready in ~30 Seconds
From tapping "Create" to a complete, illustrated story -- all in about 30 seconds, no internet required.
5 Story Themes + 3 Tones
Mix and match to create the perfect story for tonight.
Story Themes
- Space Adventure
- Underwater Discovery
- Enchanted Forest
- Cozy Home
- Cloud Kingdom
Story Tones
- Adventurous -- Exciting quests and bold heroes
- Calming -- Gentle, soothing wind-down tales
- Funny -- Silly giggles and playful twists
15 Unique Combos
Every combination of theme and tone produces a distinct storytelling style. That's 15 possible story flavors -- and infinite unique stories within each one.
Personalization
Your child is the hero of every adventure.
Child as Protagonist
Enter your child's name and it appears throughout the story as the main character. They'll love hearing their own adventures.
Age-Appropriate Content
Stories adapt to your child's age (3-8). Vocabulary, sentence length, and story complexity all scale to the right level.
Never the Same Twice
Each story is uniquely generated. Even the same theme and tone combination produces fresh adventures every time.
Neural TTS Narration
Stories read aloud with natural, expressive voices powered by neural TTS.
Play / Pause
Start and stop narration at any point with simple playback controls.
Restart
Jump back to the beginning to hear the whole story again with a single tap.
Speed Control
Adjust narration speed to match your child's listening preference -- slower for younger kids, faster for older ones.
Sentence Highlighting
Follow along as each sentence lights up in sync with the narration. Great for early readers.
Story Library
Build a personal collection of your child's favorite tales.
Save Stories
Every generated story is automatically saved to your device's local library for easy access.
Favorite Stories
Mark the best stories as favorites so your child can quickly find and revisit the ones they love most.
Replay Anytime
Re-read or re-listen to any saved story whenever your child wants to hear it again. Their library grows with them.
Works Offline
No internet needed after the initial setup.
On-Device AI
The on-device language model runs entirely on your phone or tablet. Story generation needs zero connectivity.
On-Device TTS
Neural text-to-speech also runs locally. Narration works without Wi-Fi or cellular data.
Perfect for Bedtime
Airplane mode, cabin, car ride, camping trip -- Sleepy Spell works everywhere your family goes.
Content Safety
Built from the ground up to keep your child safe.
COPPA Compliant
Fully compliant with the Children's Online Privacy Protection Act. No personal data is collected or transmitted.
Input Sanitization
All user inputs -- names, ages, selections -- are sanitized and validated before reaching the AI model.
Output Filtering
Generated stories pass through content filters to ensure age-appropriate language and positive themes.
No Scary Content
Stories are designed to be warm and positive. No villains, no fear, no nightmares -- just sweet dreams.