How it works
Overstimulated? Two taps.
Sia is for the moments when everything is too much. It has one job: make it quieter, fast — and, when you want, help you see your life more clearly.
The Misunderstood Reality
What people often say
- ×"Just toughen up"
- ×"You're being too sensitive"
- ×"Stop overthinking everything"
- ×"Just push through it"
What's actually happening
- ✓Your nervous system processes information more deeply
- ✓You notice subtleties others miss
- ✓Your empathy and awareness are gifts
- ✓You need tools that work with your wiring, not against it
Psychologist Dr. Elaine Aron's research on Highly Sensitive People reveals this isn't a weakness or something to fix — it's a trait present in about 20% of the population. Your sensitivity is how your nervous system is wired, and it comes with both profound strengths and specific needs.
The Science Behind High Sensitivity
Research on Sensory Processing Sensitivity (SPS) has identified four core dimensions that characterize the highly sensitive trait. Understanding these helps explain why certain situations feel more intense for you — and how the right support can make a real difference.
Depth of Processing
You process information thoroughly, noticing implications and connections others might miss. You think deeply about decisions and naturally reflect on meanings and patterns.
How Sia addresses this →
Every technique includes clear explanations of why it works, honoring your need to understand the science and reasoning behind each approach.
Overstimulation
Your nervous system reaches sensory or emotional overload more quickly in high-stimulation environments. What others handle easily can drain your energy reserves faster.
How Sia addresses this →
Immediate support for overwhelming moments, plus tools to track your energy patterns and prevent hitting "empty" before it happens.
Emotional Reactivity & Empathy
You experience emotions deeply and naturally attune to others' feelings and needs. You walk into a room and instantly sense the emotional atmosphere.
How Sia addresses this →
Boundary-setting techniques that help you protect your energy while preserving your empathy and emotional depth.
Sensing the Subtle
You notice subtle changes in your environment — from shifts in mood to sensory details like changes in lighting, sound, or temperature that others don't register.
How Sia addresses this →
Tools to track the patterns you observe and validate what you're noticing, helping you learn from your acute awareness.
Want to learn more? Dr. Elaine Aron's book The Highly Sensitive Person is a great starting point, or visit hsperson.com for research and resources.
A note on neurodivergence: Sensory processing sensitivity often appears alongside ADHD, autism, and other neurodivergent traits. Research shows significant overlap between high sensitivity and neurodivergence. Sia is not a medical app and does not diagnose or treat ADHD, autism, or other conditions. We focus specifically on supporting the sensory and emotional sensitivity aspects that many neurodivergent individuals experience, regardless of diagnosis.
How Sia works
Sia opens on one question and follows your answer. Nothing here is a diagnosis, and nothing is ever demanded.
How much room?
Sia asks how much room you have. Barely any: only the breath. Some: short ways in. Plenty: the whole library. The light follows your answer.
The sun
The light at the top of the home holds one thing: the moment Sia thinks is closest to you right now — because you said where life is a lot, because it helped before, or because of the hour. Under it, two more. Each says what it asks before you tap: how many steps, how many minutes.
Now · My life · Me
Now is the home. My life shows six areas — body & senses, nights, calm, people, work, growth — and lights up where you have been. Me holds what you saved, your patterns, your sensitivity profile and the settings.
A next time
After a moment that helped, Sia asks whether there is a next time. Name it — the meeting, the train, the family dinner — and the sun holds it until then. One quiet hello, only if you say yes. No streaks, no scores, nothing to keep up.
Yours
What you answer, do and save stays on this phone. No account is needed. Analytics only after you say yes, and never a word of what you wrote.
Why Sia is different
Built by highly sensitive people, for highly sensitive people — and written twice, in English and in German, never translated.
Relief first
Not a menu, not a course. In the worst minute of the day you get one thing that helps, within two taps.
Grounded in the research
Sensory processing sensitivity is a trait, not a flaw. Every situation and technique is written from that understanding.
The acute part is free. Forever.
Everything that helps in the moment is free — for everyone, always. Sia Plus is the before and the after: preparing for the next time, looking back once it's over, and what your weeks show.
How Sia stays free where it matters
Relief in the moment should be free for everyone, always — and it is. Sia Plus pays for the work: the before and the after, preparing for the next time, looking back, what your weeks show, and the courses. €6.99 a month or €39.99 a year with 7 days free, or €94.99 once. If you'd rather leave a tip, that's welcome too.
Ready to try Sia?
Free to start, no account, in English and German. Or begin with the sensitivity quiz.
Research & Attribution
Our understanding of high sensitivity is informed by decades of research on Sensory Processing Sensitivity, including the foundational work of psychologist Dr. Elaine Aron. For deeper learning, visit her official website or read The Highly Sensitive Person.
Sia is an independent app designed to support highly sensitive people. We are not affiliated with or endorsed by Dr. Aron or her research organization. The four dimensions of sensitivity referenced here draw from peer-reviewed research in the field of sensory processing sensitivity.