Cardiio: Heart Rate Monitor

Actually does

• ✓Heart rate70% of reviews
• ✓Analytics Dashboard
• ✓Workout tracking15% of reviews
• ✓Progress Tracking10% of reviews
• ✓Subscription40% of reviews
• ✓Free tier50% of reviews
• ✓Russian localization(bonus)10% of reviews

Claimed, but not confirmed by reviews

• ⚠Data export
• ⚠Sync across devices
• ⚠Измерение уровня кислорода в крови
• ⚠Оценка артериального давления

Common complaints

• ✗Unstable measurements and frequent errors35% of mentions

  «The app lags, it takes 10 attempts to measure pulse, but usually I don't have the patience»

• ✗Signal loss during measurement requires retry attempts30% of mentions

  «It shows numbers but then turns out there was no signal and asks to try again»

• ✗Sensor sensitivity issues — either too much pressure required or too little15% of mentions

  «Usually I press on the camera and it says 'too hard', I barely touch it and it's the same… impossible to use!»

• ✗App marketed as free but core content requires paid subscription10% of mentions

  «The app is paid even though it's marketed as free»

• ✗Intrusive pop-ups offering premium version purchase8% of mentions

  «After the update, the pop-up offering premium purchase stopped appearing»

What people praise

• ★High accuracy of pulse measurement

  «Was unexpectedly surprised, the pulse measurement is actually quite accurate… the result is always around 90% correct»

• ★Simple to use, convenient interface

  «I use the free version, very convenient for measuring pulse»

• ★No ads in the app

  «Seems to be without ads»

• ★Long-term stability with regular use

  «I've been using Cardio since 2018. When at rest, the readings almost match the data from my smartwatch»

• ★Syncs with Apple Health for health tracking

  «It transfers data to Health»

Where to install