Lens HRV

6 Downloads 12 Views v1.0 2.29 MB 4.1+

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(2.29 MB)

Editor's Overview

Lens HRV is a health manager application developed by LensHRV, packaged as a single Android APK of version 1.0 weighing in at 2.29 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 2.29 MB, so it installs quickly even on modest connections.
This build is signed by "LensHRV" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

About this app

Lens HRV is an Android app that measures heart-rate variability — how much the time between your heartbeats changes from one beat to the next, measured in milliseconds. It uses Photoplethysmography (PPG), a simple optical technique that detects tiny changes in blood flow through your fingertip using only your phone’s camera and flash. Completely non-invasive and requires no extra sensors.

Why HRV matters

Heart-rate variability is more than just a heart measurement. The small changes between your heartbeats come from many processes happening in the body at the same time. Your heart does not work alone. It is constantly interacting with the rest of the body — the nervous system, the lungs, hormones, temperature, the immune system, digestion, circadian cycles, emotions and more. HRV works like a microscope that lets us observe that interconnected network.

What makes Lens HRV different

Most HRV apps today work like closed boxes. They are usually paid, require expensive extra sensors, and only show you the final numbers they decide to calculate. You rarely get access to the raw signal. Many of them also oversimplify the body’s state into a single score or color.

Lens HRV is completely open source. Every algorithm it uses comes from publicly available, peer-reviewed research. The focus is on classic digital signal processing instead of heavy artificial intelligence. This keeps the app lightweight, understandable, and able to run on a wide range of devices.

All data is processed directly on your phone — nothing is sent to the cloud. You keep full privacy and full control.

The app does not offer “readiness” scores. That kind of metric is considered too complex and often oversimplified. Instead, Lens HRV focuses on clear and simple measurements. The goal is a frictionless tool that is accessible to everyone.

How it works

Place your index finger over the camera lens until the preview turns a deep red. A short calibration starts the recording. Keep the finger still. When it ends, the full signal is processed offline. The preset is meant for normal indoor conditions.

What you get

Time domain: Heart Rate, RMSSD, SDNN and Stress Index.

Frequency domain: Total Power, LF, HF, LF/HF, LF Peak, respiration rate and Coherence Score.

Each session also shows artifacts and coverage. Below 5% is excellent, below 15% is good, and 15% or more is invalidated.

Each session is compared with a 7-day baseline. Settings can export your data as CSV.

Disclaimer

Lens HRV is a technical tool for personal data tracking and analysis. It is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional for any health-related decisions.

Details

Version	v1.0
Size	2.29 MB
Developer	LensHRV
Category	Health Manager
Package	com.lenshrv.foss
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	6

Frequently Asked Questions

Is Lens HRV free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does Lens HRV require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is Lens HRV safe to install?
We link to the exact APK published by LensHRV. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update Lens HRV?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install Lens HRV

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded com.lenshrv.foss.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «Lens HRV» by LensHRV and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.