Comparison

Senstream vs PIEL Data

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Senstream

This app records physiological signal data from a wearable ring, capturing electrodermal activity, ECG, PPG, temperature, and motion. It connects to the cloud for powerful data analysis, enabling new types of research.

Highlights
  • Electrodermal activity (EDA/GSR) capture
  • ECG and PPG data recording
  • Temperature and motion sensing
  • Mobile and cloud data synchronization
  • BIOPAC integration
Read full description

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!

About

PIEL Data

Features
Read full description

PIEL Data is an app designed to help researchers manage the data collected from projects using the PIEL Survey app (available on the Apple Store). The app only handles the specific file format of the PIEL Survey app and cannot process other data file types. The PIEL Survey app enables researchers to conduct “in the moment” surveys. The data is received in the form of individual “csv” files which then have to be merged manually using spreadsheet software. The PIEL Data app enables researchers to import the participant data files into to the app database. This data can then be exported into a merged “csv” file which can easily be imported into third party spreadsheet or statistical software. The PIEL Survey app has been used by more than 40 universities in the US and Europe with more than 50 per reviewed publications. The PIEL Data app will streamline the process of conducting such projects.

Screenshots

Senstream4 screens
PIEL Data4 screens

Verdict

The call

The clearest difference is update cadence: PIEL Data at every 5 weeks against Senstream's every 3 months. Senstream's advantage is device support (4 vs 2). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Senstream ships an update every 3 months, PIEL Data every 5 weeks. The most recent releases landed on September 19, 2026 and September 17, 2026 respectively.

Scorecard2 real differences · 7 level
Senstream versus PIEL Data: the parameters behind the verdict, then further details
ParameterSenstreamPIEL Data
PriceFreeFree
Rating4.3 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, Mac, Vision Pro — betteriPhone, iPad
Requires iOS17.616.0 — better
Further details — not scored
Size19 MB3 MB
Age rating4+4+
DeveloperSenstream, Inc.Blue Jay Ventures Pty Ltd

In-app purchases

None

Senstream

No in-app purchases

None

PIEL Data

No in-app purchases

Questions

Is Senstream free?
Senstream is free to download, with no in-app purchases.
Is PIEL Data free?
PIEL Data is free to download, with no in-app purchases.
Do Senstream or PIEL Data have ads?
Neither Senstream nor PIEL Data shows ads.
Which is updated more often, Senstream or PIEL Data?
Senstream ships an update every 3 months, and PIEL Data every 5 weeks. Most recently, Senstream was updated on September 19, 2026 and PIEL Data on September 17, 2026.

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