Your gentle companion forsensitive souls
Evidence-based support designed specifically for highly sensitive people. Find calm in overwhelm, understand your sensitivity, and build your personal relief toolbox.
Free forever • No account required • Works offline
Why 15-20% of people need Sia
High sensitivity is a scientifically recognized trait. If you process emotions deeply, feel overwhelmed in busy environments, or need more time to decompress - Sia was made for you.
Understand Yourself
Take the HSP profile quiz to discover your unique sensitivity patterns
Build Your Toolbox
Save techniques that work for you in your personal relief collection
Find Immediate Relief
Access calming techniques anytime, anywhere - even offline
Designed for sensitive nervous systems
Every detail crafted to feel calm, never overwhelming
Calming Techniques
Evidence-based exercises for moments of overwhelm
Situation Guides
Step-by-step help for challenging scenarios
HSP Profile Quiz
Discover your unique sensitivity patterns
Relief Toolbox
Save what works for quick access later
Everything you need, nothing you don't
Two-Part Guidance
Each technique offers immediate relief AND deeper understanding - so you can calm down now and grow stronger over time.
Dark Mode & Accessibility
Gentle on sensitive eyes with full dark mode support, larger text options, and a calm color palette throughout.
Works Everywhere
iPhone, iPad, Mac (Apple Silicon), Apple Vision, and Android. Your relief toolbox travels with you.
Instant Access
No sign-up required. Download and start using immediately. Everything works offline too.
Private by Design
Your personal data stays on device
- ✓ Journal entries
- ✓ Mood tracking
- ✓ HSP assessment results
- ✓ Technique ratings
Encrypted with AES-256
What we collect for app functionality
- • Anonymous usage analytics
- • Purchase receipts (if you buy)
- • Account info (only if you sign in)
No account required to use Sia
Your most sensitive data never leaves your device. We can't see your journals, mood entries, or assessment results - and we never will.
Ready to feel understood?
Start your journey to understanding your sensitivity
Sia is free, forever. Support us on Ko-fi if you would like to help.
Common questions
Is Sia really free?
Yes! Sia is completely free with no hidden costs. We offer optional tips in the app if you want to support development, but everything works without paying.
Do I need to create an account?
No account needed. Download and start using Sia immediately. Your data stays on your device, encrypted and private.
What is a highly sensitive person (HSP)?
HSP is a scientifically recognized trait affecting 15-20% of people. HSPs process emotions more deeply and are more sensitive to stimuli. Sia helps you understand and work with this trait.