About Sia
An app for people who feel more, hear more, and see more
Sia gives highly sensitive people situation-based guidance, practical techniques, and compassionate community support. Everything we build is co-created with sensitives, experts, and partners so you can navigate daily life on your own terms.
What is Sia?
Sia is an app for highly sensitive people — people whose nervous system takes in more, and reaches too much sooner. It has one job: make it quieter in the moment it is needed, within two taps, and, when you want, help you see your life more clearly.
Sensory processing sensitivity can appear in anyone. It is often present in people on ADHD or autism spectrums, yet it remains under-supported. Living with high sensitivity is powerful, but it also means navigating a world primarily designed for neurotypical perception. Sia exists to add ease, context, and tools so you can harness the strengths of feeling deeply.
Situations & Techniques
Situations give you the way out when you are in the middle of something — a family dinner, a difficult colleague, bright lights on your commute, the train home. 36 of them, each written natively in English and in German. The acute flow is free; preparing for the next time and looking back afterwards is Sia Plus.
Techniques offer adaptable practices you can integrate into routines. Each technique includes clear instructions and "Why it works" explanations, backed by science and vetted by the community. If you know a technique we are missing, you can contribute and help expand the library.
Accessible support, always
The acute part is free, forever. Everyone deserves relief in the moment it is needed. Sia Plus is the before and the after: preparing, looking back, what your weeks show, and courses by Sia and by experts who include theirs.
- Match with HSP-knowledgeable therapists and coaches for individual support.
- Help organizations build more HSP-friendly environments with workplace consultants.
- Discover products and services that other HSPs trust — only when you are seeking them out.
Sia Plus is what pays for the work — €6.99 a month or €39.99 a year, both with 7 days free, or €94.99 once. No account, no streaks, no metering.
Sia's story
Markus Fordemann, Sia's founder, discovered his own sensory processing sensitivity at age 31 and was later diagnosed with ADHD. After years of conversations with fellow HSPs and global experts, he set out to build shared, practical solutions from the ground up.
With a background in digital product development, Markus created Sia as an app that could evolve alongside the community. Every release is informed by real feedback and a commitment to helping sensitives thrive.
Today Sia runs on iOS and Android, in English and in German — both written, neither translated. What comes next is decided with the people who use it.
Collaborate with us
We believe in co-creating neurodivergent-friendly tools alongside the people who use them. Whether you are an HSP, practitioner, researcher, or organization, we would love to hear from you.
Become a beta tester to see new features first, share your feedback, and help guide the next version of Sia.
If you are an expert or organization, reach out to explore collaboration, workplace programs, or community initiatives.
Ready to shape the future of Sia?
Share your ideas, feature requests, or sensitivities that need more attention. We respond to every message and regularly invite collaborators into our beta program.