Best apps like O2CO2

15+ similar apps compared and reviewed

4.0 avg rating
9 free apps
Updated July 2026

O2CO2 is great, but it's not the only option. Explore 15+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

simply. nutrition tips

simply. nutrition tips by simply advisory LLC

that help you get healthy.
πŸ’ͺ Health & Fitness
5.0(17 ratings)
FreeIn-App Purchases
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Get daily nutrition tips from certified nutritionists with a subscription to this app, and start your journey to a healthier lifestyle. With features like customizable notifications, saved tips, and a tip tracker, you can easily incorporate healthy habits into your daily life.

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Top Alternatives to O2CO2

Ice - Your Body Belongs to You#1

Ice - Your Body Belongs to You by 3Dme Pty Ltd

Editor's Choice
πŸ’ͺ Health & Fitness
1.5(4 ratings)
Free
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This app uses 3D animations and a video to explain the physical and psychological effects of crystal meth on the human body. It details consumption methods, brain chemistry, and the stages of drug use to educate young people, parents, teachers, and health professionals.

Withings#2

Withings by Withings

THE NEXUS OF YOUR HEALTH
Strong Contender
πŸ’ͺ Health & Fitness
4.6😐(357K ratings)
FreeIn-App Purchases
#76in Health & Fitness
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This app serves as a central hub for managing your health, consolidating data from various devices and apps. It provides insights, educational content, and tools to track progress towards goals like weight loss, activity, and sleep. Share your health data securely with your doctor for informed medical decisions.

What We Love

  • ⭐ Excellent app and product integration
  • πŸ“Š Comprehensive health tracking
  • πŸ”‹ Good battery life on devices
  • 🀝 Helpful customer support

Room to Improve

  • πŸ› Connectivity and syncing issues
  • πŸ“ˆ Confusing or cluttered UI
  • πŸ” Lack of customization options
RespiRelax+#3

RespiRelax+ by SA SET ALLEVARD

Worth Considering
πŸ’ͺ Health & Fitness
4.3(180 ratings)
Free
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Improve your breathing and manage stress with guided exercises. This app offers personalized programs and offline functionality for consistent practice, promoting well-being and cardiac coherence.

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4
Kid Care - from SLCH
Kid Care - from SLCH
Kid Care - from SLCH
St. Louis Children's Hospital
Free

This app helps parents manage their child's health with tools for everyday decisions, symptom assessment, first aid, and medication tracking. It also provides quick access to find doctors, hospital locations, and emergency contacts.

Symptom assessment for illness and injuryParent advice on behavior and wellnessFirst aid quick reference
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ApothekenApp Wuppertal / Gevelsberg
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Breathing Flow
Breathing Flow
Breathing Flow
inhale. exhale. feel better
$0.99

This app guides you through rhythmic breathing exercises to promote mindfulness, reduce stress, and improve focus. Its unique touch interface creates an immersive experience, making relaxation feel like a game.

Guided breathing techniquesStress and anxiety managementFocus and concentration enhancement
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Breathrive: Deep Breathing
Breathrive: Deep Breathing
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Breathe now. Stress relief
Breathe now. Stress relief
Breathe now. Stress relief
Breathing exercises and calm
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This app offers guided breathing exercises to help users manage stress, improve sleep, and enhance focus. It provides a variety of programs and quick sessions for immediate relief, with customizable options and progress tracking.

Guided breathing programsSOS sessions for panicCustomizable breath cycles
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9
Breathr: Mindful Moments
Breathr: Mindful Moments
Breathr: Mindful Moments
by PHSA
Free

Explore easy and fun ways to practice mindfulness and self-compassion. Developed by experts, this app offers guided meditations, customizable practices, and a journal to track your thoughts and feelings. Discover the benefits of living in the present moment.

Guided meditationsMindfulness practicesJournal function
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Breathwork & Guided Breathing
Breathwork & Guided Breathing
Breathwork & Guided Breathing
Guided Breathing Exercise
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This app offers guided breathing exercises designed to improve lung health, sleep quality, and mental well-being. It provides personalized programs for various health goals, including managing COPD, asthma relief, anxiety reduction, and enhanced focus. Users can track their progress with easy-to-follow instructions for different breathing techniques.

Personalized breathing exercisesImprove lung health and capacityEnhance sleep quality
πŸ’ͺ Health & Fitness
(1)
ad-supported