Comparison

Lief App vs Yudemon HRV

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

Head to head
About

Lief App

This smart patch discreetly tracks heart rate and variability to help you manage stress. It offers drug-free biofeedback exercises to train your body's stress response, promoting mindfulness and control.

Highlights
  • HRV tracking
  • Heart rate monitoring
  • Biofeedback exercises
  • Stress response training
  • On-demand stress relief
  • Drug-free solution
Features
Read full description

Lief is a discreet, clinically-accurate smart-patch that measures your heart rate and heart rate variability. It trains you to control your body’s natural stress response through guided, gentle, and safe biofeedback exercises. Lief’s on-demand stress relief intervention is a 100% drug-free solution to improve your health and to remain mindful and in control throughout your day.

About

Yudemon HRV

Enhance stress resilience and self-regulation with this visual and sonic tool for resonance breathing and HRV biofeedback. Connect a heart rate monitor for advanced analytics and personalized training journeys. Enjoy dynamic visuals and custom soundscapes designed to optimize your practice.

Highlights
  • Resonance breathing timer
  • HRV biofeedback training
  • ECG heart rate monitor integration
  • Journey Mode for optimal breathing rate
  • Customizable visuals and soundscapes
  • Heartwork generative art based on data
Features
Read full description

Yudemon HRV is a unique visual and sonic tool for resonance breathing and HRV biofeedback training. It provides a fun and engaging workout for your autonomic nervous system, helping you build stress resilience and enhanced self-regulation. You can either use the app as a basic breath timer, or connect an ECG-based heart rate monitor (like the Polar H10) via Bluetooth for full biofeedback and analytics. Unless you specifically opt-in to cloud sync, all data processing happens on your device, so your data is completely secure. Using Yudemon with a heart rate monitor not only allows you to track and visualise your data for each session, it also enables you to use Yudemon's Journey Mode, a novel and unique way of establishing your own optimal breathing rate over the course of multiple sessions. Yudemon's adjustable visuals and soundscapes offer infinite variations, making every breathing session feel fresh and engaging. By default, the app’s appearance automatically changes on a daily basis. Or, with Yudemon Pro, you can take full control and customize everything manually. A healthy heart does not beat like a metronome but constantly adapts to the requirements of the present moment. Heart rate variability (HRV) biofeedback training and resonance breathing are based on the fact that our breathing has a direct impact on the rest of our physiology. By controlling our breathing in specific ways we can train our body to become more adaptable and perform better under stress. Yudemon helps you with this practice. Yudemon HRV is the first breathing app with custom soundsapes and functional music specifically designed for resonance breathing and HRV biofeedback training. The soundscapes guide you in your breathing sessions and aim to enhance the effects of the practice. It also integrates other aspects of generative art, such as the "Heartwork", a unique piece of art based on your very own physiological data that is generated and grows with you as you complete more sessions. New visuals, soundscapes, and effects are added on a regular basis. Terms of Service: https://app.yudemon.com/terms Privacy Policy: https://app.yudemon.com/privacy

Screenshots

Lief App4 screens
Yudemon HRV4 screens

Verdict

The call

The clearest difference is review sentiment: Yudemon HRV at 90% against Lief App's 45%. Yudemon HRV also leads on update cadence (every 2 days vs monthly). Lief App's advantage is in-app purchases (none vs 4) and iOS requirement (13.0 vs 15.0). On price, ads and device support 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. Yudemon HRV sells 4 in-app purchases, starting at $2.99 per month. Lief App asks for nothing beyond the download.

UpkeepUpdate frequency

Lief App ships an update monthly, Yudemon HRV every 2 days. The most recent releases landed on September 20, 2026 and September 22, 2026 respectively.

Scorecard5 real differences · 5 level
Lief App versus Yudemon HRV: the parameters behind the verdict, then further details
ParameterLief AppYudemon HRV
PriceFreeFree
Rating—4.5 (12 ratings) — better
Positive reviews44.7% of reviews90.0% of reviews — better
Number of ratings—12 — better
Update frequencyMonthlyEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size80 MB169 MB
Age rating4+4+
DeveloperBrainBot, Inc.Yudemon LLC

Customer experience

Lief App

Written reviews47 reviews
Positive44.7%
Neutral8.5%
Negative46.8%

Yudemon HRV

All ratings12 ratings
Positive83.3%
Neutral16.7%
Negative0.0%
Written reviews10 reviews
Positive90.0%
Neutral0.0%
Negative10.0%

Bugs and requests

Lief App

Reported bugs

19 issues
  • Unable to download latest update
  • App bricked after update
  • Stuck on pulsing screen
  • Won't connect on iPhone or Mac
  • Self-pacing (buzzing) not working
Show 14 more
  • Annoying check-in feature cannot be turned off
  • App cannot be opened
  • Cancel subscription button not working
  • App crashes upon opening
  • App kicks user off after update
  • App crashes multiple times when opened
  • App does not reliably download data
  • App unstable after recent updates
  • App crashes, kills battery
  • App chews through cell data
  • App not connecting reliably to internet
  • App does not work without connection
  • Device keeps telling user they are stressed
  • App takes a long time to load

Requested features

6 requests
  • Add button to turn off vibration
  • Make subscription more affordable
  • Sell device outright
  • Provide clear instructions/manual
  • Improve data breakdown and comparison
Show 1 more
  • Allow adding notes for activities/moods

Yudemon HRV

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Lief App

No in-app purchases

4 purchases

Yudemon HRV

Subscriptions4
  • Yudemon Pro (Monthly)$2.991 Month
  • Yudemon Pro (Monthly)$4.991 Month
  • Yudemon Pro (Yearly)$19.991 Year
Show 1 more
  • Yudemon Pro (Yearly)$29.991 Year

Questions

Is Lief App free?
Lief App is free to download, with no in-app purchases.
Is Yudemon HRV free?
Yudemon HRV is free to download, with in-app purchases available.
Do Lief App or Yudemon HRV have ads?
Neither Lief App nor Yudemon HRV shows ads.
Which is updated more often, Lief App or Yudemon HRV?
Lief App ships an update monthly, and Yudemon HRV every 2 days. Most recently, Lief App was updated on September 20, 2026 and Yudemon HRV on September 22, 2026.

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