Session Resiliency • Fixed a crash that could occur when exporting very long recordings (8+ hours) • Improved session upload reliability with automatic retry for failed uploads • Added manual retry option for uploads that couldn't complete Session Review Improvements • Redesigned EDA charts with modern styling and improved readability • Faster signal loading for large session files with progress indicator • Fixed an issue where session data could have incorrect timestamps General • Various performance improvements and bug fixes around Swift concurrency

Platform & Performance • Memory-efficient retimestamping algorithm for accurately measuring real signal frequency including data gaps and packet loss • Concurrent post-processing utilizing multi-core architectures for faster session finalization • iOS 26 Liquid Glass compatibility and UI refinements for the new design language • Stability improvements for extended recording sessions and large dataset processing Enhanced Real-Time Signal Processing • Real-time peak detection visualization for ECG, PPG, and EDA signals during data acquisition • Live signal filtering with improved baseline wander removal and adaptive noise reduction • Operator view enhancements for clearer signal monitoring during extended recording sessions • Live signal verification before a session starts Data Management & Workflow Improvements • Live Activities integration: monitor and control recording sessions from the lock screen or Dynamic Island • Enhanced session metadata persistence including actual measured signal sampling rates • Multi-ring session support optimized for synchronized physiological measurements across subjects This update reflects our continued commitment to providing researchers with professional-grade tools for ambulatory physiological monitoring and analysis.

This update contains bug fixes that were preventing users from recording Senstream Sessions locally on their device.

• Temperature Sensor: Corrected a data conversion from raw voltage to Celsius • Bug fix for adding a Senstream Ring on iOS 16 • UI layout bug fixes in Ring Details and Record Session

Senstream is now a documents-based app, allowing you to control where your research session data lives.  * Senstream Cloud stores your session data remotely and allows you to access it on any device or through the web at https://charts.senstream.com * Local Files integration allows you to store your session data locally on device, iCloud, network drives, or most third party providers that integrate with the Files app * New accelerometer (IMU) data is captured at 50Hz alongside other bio signal data (requires a free firmware upgrade for your Senstream Ring). * "Mark Event" allows you to manually record events during a session. * Optional audible or visual session start markers allow you to synchronize a Senstream research session with other systems. * The EDA signal’s units is now displayed in Microsiemens * If one of more Senstream Ring disconnects while recording a session (ring battery depletion, ring out of range/signal interference), the app will attempt to reconnect to the ring. Previously the app ended the session when a ring disconnected. * Many bug fixes and performance improvements to allow your device to record longer sessions.

This version addresses a bug in longer running sessions (longer than 43 minutes) where the ring’s timestamp index loop was incorrectly translated into a real-world timestamp.

Bug fixes around timestamp calculation in all modes and session duration start/stop time calculations. Improvement in background session uploading for large session files.

Compatibility with ring firmware version 1.0.1 which introduces more efficient large Bluetooth packets when using high-frequency sensor modes. This change allows a greater number of ring peripherals to simultaneously connect and record session data. Bug fixes around session upload handling and missing packet percentage calculation.

This version improves high frequency session recording. When the ring signal drops or temporarily disconnects, missed data packets are annotated in your session data file. Version 1.0.2 is required for connecting to rings the latest Senstream firmware which includes a brand new 400Hz PPG, 400Hz EDA, and 20Hz Temperature sensor mode. Session file uploads and downloads from the cloud are now much faster and reliable for long sessions. The ring details screen now shows the ring’s serial number and an “Identify” button that will blink the ring. You may also swipe right on any ring from the “Record Session” screen to make a ring blink. Many stability improvements during session recording and bug fixes.

The Sessions tab has been rewritten to better show your list of sessions stored on device and in Senstream Cloud. Session Detail includes a new and improved chart view. Switch between signal types, toggle peak annotations, change zoom levels, rename your session, and export your session data. The temperature signal is now being recorded in Celsius. The app will let you know when new firmware is available for rings paired with your app. Tap on a ring to view its detail, upgrade its firmware, calibrate, and set it into “Ship Mode”. Once the ring is in this new mode, place it on its charger to wake it up again.