Lief App

Name: Lief App
Rating: 3.9 (72 reviews)
Author: BrainBot, Inc.

By: BrainBot, Inc.

Track HRV, relieve stress

Features & Capabilities

Lief App is a discreet, clinically-accurate smart-patch that measures heart rate and heart rate variability (HRV). It trains you to control your body's natural stress response through guided, gentle biofeedback exercises.

This on-demand, drug-free stress relief solution helps improve well-being and daily mindfulness, keeping you in control throughout your day.

User Growth & Download Statistics

App Data Privacy & Security Education

By:

BrainBot, Inc.

Rating:

3.90

(72)

Version:

14.1 Last updated: 2026-06-08

Version code:

886609802

Creation date:

2017-09-28

Compatible devices:

Size:

79.38MB

URLs:

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-11

Compare stats and ranking:

Ranking

# 180,585 ▼ 173

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

BrainBot, Inc.

Apple Apps Store

https://apps.apple.com/us/app/lief-app/id1289075477

User Reviews

Reviewers praise Lief for real-time HRV feedback, downtime breathing, and stress relief. Many users also find it easy to use. Recurring concerns include app crashes, connectivity issues, update problems, unclear data visualization, and billing/support problems. Overall, Lief shows strong potential when functioning, but reliability and UX gaps hinder frequent use.

Pros

Real-time HRV biofeedback with automatic dosing based on HRV dips
Downtime breathing guidance that helps regulate the nervous system
Significant reduction in anxiety and stress for many users
Easy-to-use, beginner-friendly interface with intuitive coaching
Passive device vibrations provide hands-off reminders for breathing

Cons

Frequent crashes and the app often won’t open or remains unresponsive
Ongoing device–app connectivity problems and unreliable background operation
Update/download issues and iOS compatibility causing the app to fail to run
Poor data visualization and lack of clear instructions/notes for HRV data
Billing problems (inability to cancel; unexpected charges) and limited customer support

Recent reviews

Unable to download the latest update of the App. Tried deleting the app, restarted the phone multiple times and different networks with no success.

by Ca*****, 2025-08-25

I only got to use Lief for 1 day before version 8.1 bricked it. Now it’s stuck on the pulsing screen and won’t connect on either iPhone or Mac. Please fix ASAP — I’ll update this review once it works again.

by Da*****, 2025-08-24

I like the Lief device when it is working. However, most of the time there is connectivity problem. A friend also has the same problem with Lief. Customer support is not much help.