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Screenshots

  • Open-red screenshot 1
  • Open-red screenshot 2
  • Open-red screenshot 3
  • Open-red screenshot 4
  • Open-red screenshot 5
  • Open-red screenshot 6

About Open-red

Open-red is a citizen-science platform that turns your phone into a portable measurement station. Pair it with specialized Bluetooth devices and contribute your data to open scientific projects about the environment.

WHAT CAN YOU MEASURE?
• Ionizing radiation with RadiaCode: dose rate (µSv/h) and counts per minute (CPM).
• Light pollution with Opple LightMaster 3: illuminance in lux.

KEY FEATURES

• Simple Bluetooth Low Energy (BLE) pairing with supported devices.
• Geolocated track recording: walk, bike or drive while your phone logs every measurement.
• Background service so you don't lose data when the screen is locked.
• Interactive maps with your readings and the community's.
• Real-time visualization with gauges and charts.
• Open, exportable data: your contributions feed a collaborative map.

OPEN AND COLLABORATIVE SCIENCE

Open-red is an open project. Every track you record is added to the global community map and helps us understand how background radiation or night-sky brightness varies across your area. Data is indicative and depends on the sensor, calibration and measurement conditions.

JOIN THE COMMUNITY

Got another device you'd like to see integrated? Want to suggest improvements or contribute to the project? Find us at:

• Project website: https://open-red.es
• Collaborative map: https://map.open-red.es
• Telegram community (link inside the app)

Open-red is not a certified measurement instrument. Values are informational only and should never be used as official measurements for regulatory, health or safety purposes.

What’s new

Version 1.0.1 · Updated May 26, 2026

• Citizen-science platform: turn your phone into a portable measurement station. • Bluetooth (BLE) support for RadiaCode (ionizing radiation, µSv/h and CPM) and Opple LightMaster 3 (light pollution, lux). • Record geolocated tracks with background service — keep measuring with the screen off. • Real-time gauges and charts.

Alternatives to Open-red

Looking for apps like Open-red? Here are 6 similar Android apps on Google Play. The highest rated is phyphox (4.7/5), and all 6 are free to download.

Open-red vs. alternatives
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