# Senstream — Lab on a Finger > Wearable ring app for lab-grade physiological data acquisition. (iPhone/iPad app by Senstream, Inc..) - Source: https://appshunter.io/ios/app/senstream/id1297743398 (this page in markdown: same URL + `.md`) - Developer: [Senstream, Inc.](https://appshunter.io/developer/1297743397) - Category: Education - Price: Free - Rating: 4.30/5 from 3 App Store ratings - Age rating: 4+ - Requires: iOS 17.6 · 19 MB - Languages: American English - Released: 2023-02-13 - Data updated: 2026-06-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/senstream/id1297743398/reviews.md ## What is Senstream? RESEARCH RING: LAB GRADE PHYSIOLOGICAL DATA ACQUISITION PLEASE NOTE:  The Senstream Researcher Ring is not a medical device and is not intended to diagnose, treat, cure, monitor, or prevent medical conditions or illnesses. The app is designed to record physiological signal data, but not to make medical decisions. Multi-Sensor: Electrodermal activity (EDA, aka GSR), ECG, PPG, temperature and motion, captured from a single, user friendly device with long battery life. Electrodermal Data: Our initial product is the first ring form factor device that captures electrodermal activity with lab quality, enabling new types of research. ECG and/or Pulse: Capture electrocardiograph (ECG) and/or photoplethysmograph (PPG) data, depending on the specific needs of a study or application. Temperature and Motion: Capture temperature data from the finger, and contextualize physiological data with motion data captured by the Research Ring. Mobile and Cloud Apps: Start capturing data with just a ring and mobile app, which seamlessly connects to the cloud. BIOPAC integration offers powerful tools. Bold Vision: The Senstream roadmap, supported by a rich patent portfolio, leverages the convenience and unique physiology of the finger. Stay tuned! ## Key features - Electrodermal activity (EDA/GSR) capture - ECG and PPG data recording - Temperature and motion sensing - Mobile and cloud data synchronization - BIOPAC integration ## Frequently asked questions about Senstream ### What physiological data does Senstream collect? Senstream collects electrodermal activity (EDA/GSR), ECG, PPG, temperature, and motion data from its wearable ring. This allows for comprehensive physiological signal acquisition for research purposes. ### Is Senstream a medical device? No, the Senstream Researcher Ring is not a medical device. It is designed for research and data acquisition, not for diagnosing, treating, or preventing medical conditions. ### What devices does Senstream support? Senstream supports Mac, iPhone, iPad, and RealityDevice. This broad compatibility allows for flexible data collection and analysis across different platforms. ### How often is Senstream updated? The latest version of Senstream is 1.2.3, last updated on February 4, 2026. While the last update date is in the future, indicating potential for ongoing development, users can expect regular updates to improve functionality and data accuracy. ### What is the user sentiment for Senstream? Based on the provided data, Senstream has a rating of 4.3 stars from 3 ratings. This suggests generally positive user sentiment, though the small number of ratings indicates limited user feedback. ### Does Senstream have ads? No, Senstream does not contain advertisements. Users can expect an uninterrupted experience focused solely on data acquisition and analysis. ### How does Senstream's data acquisition compare to other research tools? Senstream offers lab-quality electrodermal activity capture in a ring form factor, enabling new types of research. Its multi-sensor capabilities and cloud integration provide powerful tools for physiological data analysis. ### What is the age rating for Senstream? Senstream has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger individuals involved in educational research projects. ## Version history (last 5 releases) ### 1.2.3 — 2026-02-04 Siri, Spotlight & Shortcuts Integration - Added App Intents: check ring status, start/end sessions, and flag events using Siri, Spotlight, or the Shortcuts app - Configurable Siri phrases like "Check my Senstream ring" and "Start Senstream session" Live Activity Improvements - Fixed Lock Screen Live Activity using the wrong view on iOS 18+ — was incorrectly showing the Apple Watch layout instead of the iOS Lock Screen layout - Redesigned Lock Screen Live Activity layout with proper spacing, improved typography, and HIG-compliant margins - Fixed stale Live Activities persisting after force quit — activities are now cleaned up on app launch - Fixed Dynamic Island clipping by using compact sensor mode names and adding padding to prevent corner cutoff - Reverted compact Dynamic Island to original tight sizing around the sensor array Chart & Signal Fixes - Fixed live session chart window durations for all signal types (ECG, PPG, EDA, Temperature, Acceleration) with appropriate per-signal window sizes - Fixed accelerometer conversion to correctly handle signed 16-bit values — negative G-force readings were being misinterpreted as large positive values ### 1.2.2 — 2026-01-29 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 ### 1.2.1 — 2025-11-06 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. ### 1.1.2 — 2025-01-31 This update contains bug fixes that were preventing users from recording Senstream Sessions locally on their device. ### 1.1.1 — 2024-08-21 • 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 ## Apps similar to Senstream | App | Rating | Price | Category | | --- | --- | --- | --- | | [trinamiX Spectroscopy](https://appshunter.io/ios/app/trinamix-spectroscopy/id1540117635) | 4.0 (1) | Free | Education | | [OEI Sim Pro](https://appshunter.io/ios/app/oei-sim-pro/id1576212260) | — | Free | Education | | [Beiwe2](https://appshunter.io/ios/app/beiwe2/id1312962738) | — | Free | Education | | [PacMeta Blood Pressure](https://appshunter.io/ios/app/pacmeta-blood-pressure/id6446398582) | — | Free | Education | | [Vernier Graphical Analysis](https://appshunter.io/ios/app/vernier-graphical-analysis/id1385963326) | 2.1 (497) | Free | Education | | [HomeCare HK Vital Signs](https://appshunter.io/ios/app/homecare-hk-vital-signs/id6465131452) | — | Free | Education | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*