Comparison

Hera Leto vs Aura CO2

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

Head to head
About

Hera Leto

Features
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Workout and relax with the World’s First AI-assisted Earphones for Working Parents – Hera Leto TWO, Hera Leto helps you detect HRV & manage your health anytime/ anywhere with AI-assisted Power Walk & Mindfulness programs. Top Highlights · Get motivated and reach your fitness goals without pressure · Track mental wellness trends and visualize the data · Personalized health data feedback · Syncs heart rate data with Bluetooth Features You don't have to run to reduce weight: The built-in 20 minutes Power Walk Program uses A.I. to coach you on your walking speed intensity and help you burn up to 100 calories safely, which is about the calories of a Starbucks Short Latte. Keeping up with mental wellness: Using the Mindfulness Program, with your eyes closed and focused on each breath you take, the A.I automatically learns your music preference and helps you get into the mindfulness zone, thus achieving relaxation. Compatible with your local music library, Spotify playlists and InApp music bundle Busy parents, especially working mothers, often find it hard to juggle their own needs and their families’ needs with their work demands. Many care about their fitness and health but do not have sufficient time for extra gym sessions. The Hera Leto app and earphones with SmartBody Sensing technology to detect heart rates, heart rate variability (HRV), and respiration rate, aim to help one effectively manage health anytime and anywhere with the 20mins AI-assisted Power Walk Program for fat burning and 20mins AI-assisted Relaxation Program. The AI can “learn” from your local music library, Spotify playlists, and the InApp music bundle. The app integrates seamlessly with Apple Health App(HealthKit) to provide a holistic view of your overall health. Apple HealthKit to fetch the basic health profile details such as height and weight to calculate and present the respiratory rate in the user interface and push the health data that is collected by our Hera Leto proprietary device to Apple Health App(HealthKit) for keeping user's health data upto date. Wondering how Hera Leto has improved your cardiac wellness when you regularly take the 20mins Relaxation program? You can view your relaxation history with detailed statistics and explanation in “Relaxation History”. If you don’t yet possess a Hera Leto TWO, you could still experience our app first with your own heart rate sensing devices, including but not limited to earbuds, wristband, or even chest belt, but we recommend using Hera Leto TWO to get the most out of our AI-DJ! Visit our websites to learn more about our products: https://www.heraleto.com/ https://www.facebook.com/heraletobyactywell/ https://www.linkedin.com/company/heraleto/ *Please consult your doctor before engaging in any physical activities. The design purpose of the Hera Leto app and earphones is not for the diagnosis, treatment, or prevention of any disease or medical condition. Please do not use them for medical purposes. For more information, please read the disclaimer in the app.

About

Aura CO2

Features
Read full description

Knowing the CO2 concentration you’ll be aware of your home/office’s need for air renewal. This application will also let you know the temperature, humidity and pressure as well as outdoor air quality information, to easily act and improve your ventilation.

Screenshots

Hera Leto4 screens
Aura CO23 screens

Verdict

The call

The clearest difference is iOS requirement: Hera Leto at 12.1 against Aura CO2's 14.0. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Hera Leto ships an update every 2 months, Aura CO2 every 3 months. The most recent releases landed on October 11, 2026 and October 3, 2026 respectively.

Scorecard1 real difference · 5 level
Hera Leto versus Aura CO2: the parameters behind the verdict, then further details
ParameterHera LetoAura CO2
PriceFreeFree
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.1 — better14.0
Further details — not scored
Size81 MB59 MB
Age rating4+4+
DeveloperWell Being Digital LtdElichens

In-app purchases

None

Hera Leto

No in-app purchases

None

Aura CO2

No in-app purchases

Questions

Is Hera Leto free?
Hera Leto is free to download, with no in-app purchases.
Is Aura CO2 free?
Aura CO2 is free to download, with no in-app purchases.
Do Hera Leto or Aura CO2 have ads?
Neither Hera Leto nor Aura CO2 shows ads.
Which is updated more often, Hera Leto or Aura CO2?
Hera Leto ships an update every 2 months, and Aura CO2 every 3 months. Most recently, Hera Leto was updated on October 11, 2026 and Aura CO2 on October 3, 2026.

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