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Made in Germany
Hardware,
done right.
Sensors, smart home and Corely — designed and built in Germany.
Small batches · 30-day returns · Direct support
About CactusIO
An independent hardware studio.
We design, assemble and support every product ourselves — from the first PCB revision to the box it ships in. No dropshipping, no rebadged parts, no anonymous support queue.
- Designed & assembled in Germany, in small batches
- 30-day returns, no questions asked
- Direct support from the people who built it
Software
The app that ties it all together.
Corely reads your training and tells you what comes next: strength forecasts, muscle balance, streaks and gym leaderboards.
Fitness · iOS & Android
Corely — the intelligent gym logbook
A profile that lifts, share cards for every PR, and leaderboards for your gym — no other logbook has them.
Explore Corely
Hardware
Sensors and hardware, engineered in-house.
Air-quality sensors with ESPHome and Home Assistant support, plus expansion boards for Flipper Zero.
IoT & Smart Home
Sensors and hardware add-ons
Designed, assembled and supported by the people who built them — no rebadged parts.
Browse the store
Why CactusIO
Built different. Works flawlessly.
Origin
Made in Germany
Every board is designed and assembled in-house, in small, carefully tested batches.
Confidence
30-day returns
Try it for a month. If it's not right, send it back — no questions asked.
Support
Real people, real answers
No ticket queues. Reach the people who actually built your hardware.
Hardware
Our current line-up.
A curated selection from the store, picked to represent where CactusIO is right now.
CactusIO is for people who care how their hardware is made. No dropshipping. No rebrands. Just things we'd want to own ourselves.