NeuroVIZR vs O2CO2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NeuroVIZR
This app uses light and sound experiences with a companion device to provide brain exercise and improve cognitive function. It offers sessions for better sleep, brain gym, and achieving specific mind states through neuroplastic changes.
- Light and sound brain exercise
- Companion device integration
- Sessions for better sleep
- Brain Gym exercises
- Mind state customization
- Neuroplasticity enhancement
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The NeuroVIZR® app is the companion to The NeuroVIZR® device and together function as a form of brain exercise, cleverly disguised as entertainment. By utilizing light and sound experiences, the app when used with the device, provides an enjoyable and engaging way for individuals to improve their brain function. In essence, the NeuroVIZR® is more than just a fun distraction - it is a tool that encourages individuals to actively engage and challenge their cognitive abilities. Brain Engagement is a novel approach to neuroplasticity that differs from Brain Entrainment. Brain Entrainment relies on the Frequency Following Response, which is the brain's ability to follow the frequency of a repeating signal, such as a light or tone. Brain Engagement, however, aims to signal the brain in a way that allows it to adapt and change more easily by providing it with constantly changing information while also helping the brain make predictions. This approach is a new and evolving field of study, with technology being used to apply these concepts to neuroplasticity. How it works? The NeuroVIZR® LED panel produces three simultaneous dimensions of light messaging to create a powerful and mesmerizing experience. MACRO patterning, MESO body pulsing, and cascades of MICRO flickering produce a satisfying First Language brain interaction. The “First Language” is a new and novel term describing the primal capacity of human beings to directly experience and gain knowledge at a pre-intellectual level when awareness is turned towards the subtle states of consciousness and their internal sensory expressions. The ability to compose and adjust three distinct yet integrated levels of light signaling simultaneously yields a unique and vibrant visual messaging experience. Each group of light signaling is effective in its own right, so when combining them, the information output is drastically enhanced, much like combining three musical instruments into a jazz ensemble. Collections Better Sleep – With early, mid-day, and evening options, our sessions are designed to regulate your Circadian Cycle for optimal rest. Brain Gym – Our Light/Sound experiences target specific aspects of healthy brain functioning, making it easier to achieve the desired effects during Brain Gym sessions. Mind States – Each session is intentionally designed with a specific theme, purpose, or intent, allowing you to experience positive short-term Mind states while establishing long-term Mind traits through neuroplastic changes in the brain. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
O2CO2
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Take a moment to breathe with O2CO2. Follow visual guides, sound cues and instructions in English or French to practise at your own pace. START FOR FREE • Cardiac Coherence in Balance mode: inhale for 5 seconds / exhale for 5 seconds, with adjustable session duration. • Guided Breathing: 3 loops of 24 breaths, at Relax pace, with a male voice. • Sound, music and volume choices in the included exercises. • Share your results at the end of a Guided Breathing session. • Exercise guides and access to the Masterclass, free for everyone. EXPLORE MORE WITH PREMIUM Both Premium plans include the same features: • Six additional exercises: Box Breathing, Sleep Breathing, Strengthen, Breathing 1:2, Alternate Nostril Breathing and Bee Breathing. • Every Guided Breathing setting: 1–15 loops or continuous mode, 8–96 breaths per loop, three paces, and male or female voice. • Four Cardiac Coherence rhythms: Balance 5/5, Relaxing 4/6, Balance + 5.5/5.5 and Energizing 6/4. • Guided Breathing session history and charts of your breath-hold times. Choose an automatically renewing annual subscription or a one-time purchase for lifetime access. The applicable price is shown before confirmation in the App Store. Payment is charged to your Apple account after confirmation. The annual subscription renews automatically unless cancelled at least 24 hours before the current period ends. Manage or cancel it in your Apple account settings. Restore purchases from within the app. PRACTISE AT YOUR OWN PACE Read each exercise’s instructions before starting. Choose your sound settings and find them again the next time you open the app. No account registration or advertising. Settings and history are stored on your device, and you choose which results to share. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://o2co2-confidentialite.eliott-romain.chatgpt.site/
Screenshots
Verdict
The clearest difference is update cadence: NeuroVIZR at weekly against O2CO2's every 3 weeks. On price, ads, in-app purchases 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
Both are free to download. NeuroVIZR sells 4 in-app purchases, starting at $8.89 per month and O2CO2 sells 2 in-app purchases, starting at $3.99 per year. Whichever you choose, the download price is not the number that matters.
NeuroVIZR ships an update weekly, O2CO2 every 3 weeks. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.
| Parameter | NeuroVIZR | O2CO2 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (141 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 141 — better | — |
| Update frequency | Weekly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.5 | 15.1 — better |
| Further details — not scored | ||
| Size | 118 MB | 353 MB |
| Age rating | +4 | 4+ |
| Developer | Vizr Technology OÜ | ELIOTT ROMAIN-SAVARD |
In-app purchases
NeuroVIZR
- Premium Monthly$8.891 Month
- Premium Plus Monthly$14.901 Month
- Premium Yearly14 Days trial$85.001 Year
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- Premium Plus Yearly14 Days trial$142.991 Year
O2CO2
- O2CO2 Premium Annual$3.991 Year
- O2CO2 Premium Lifetime$14.99









