ArcX vs Cortex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ArcX
Control your smart ring, receive personalized music recommendations, and manage your profile. Features include SOS for emergencies and integration with smartwatches for heart rate-based music.
- Personalized music recommendations
- Smart ring configuration
- SOS emergency feature
- Heart rate-based music adaptation
- Profile management
- Dashboard control hub
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ArcX is the only fitness app that matches music to your live heart rate and mood in real time. Not recommendations. Not a curated playlist. A patented performance system that evolves with every rep, every stride, every beat. MUSICBOOST - PERFORMANCE MUSIC, POWERED BY SCIENCE Your mood sets the tone. Your heart rate writes the rest. Before your workout, tell MusicBoost how you're feeling, what you're doing and how hard you're going. Connect Spotify, link your wearable and press Play. From there, MusicBoost reads your live heart rate and adapts your music in real time - turning it up as you push harder and dialling it back as you ease off. No manual adjustments. No skipping tracks. Just the right song, at the right moment, every time. Research shows tempo-matched music delivers: +15% performance output -12% perceived fatigue +20% training endurance Spotify connected. Apple Music coming soon. Protected by US Patent No. 12,681,987. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Cortex
This AI-powered coach helps you build and optimize a personalized supplement regimen based on your goals and sensitivities. It tracks your progress, provides research-backed compound information, and offers cycling schedules. Access requires a subscription.
- Personalized supplement stack creation
- AI research coach for optimization
- Daily tracking with correlation analysis
- Compound profiles with evidence tiers
- Research summaries on interactions
- Cycling and washout schedules
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Stop guessing which supplements actually work. Cortex builds your personalized protocol, tracks how you feel, and tells you what's moving the needle and what to cut. Your AI coach. Your data. Your optimized stack. Tell Cortex your goals, sensitivities, and current regimen, and the AI coach builds a personalized stack you can actually follow, then helps you adjust it over time. Every compound is shown with its evidence tier, and recommendations are backed by citations to the research behind them, so you can see why something is suggested and weigh it with your own clinician. A Cortex membership is required to access your personalized stack and the AI coach. Membership includes: - A personalized stack built around your goals, sensitivities, and current regimen - An AI research coach for stack questions and optimization — educational information, not medical advice - Daily tracking with correlation analysis, so you can see what's actually working - Compound profiles with evidence tiers and citations to peer-reviewed and institutional sources (PubMed / NIH) - Research summaries on potential compound interactions - Cycling schedules and washout tracking Cortex requires an auto-renewing subscription to access your personalized stack and the AI coach. Payment is charged to your Apple ID at confirmation of purchase. Your subscription automatically renews unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://cortexprotocol.app/privacy Terms & Conditions: https://cortexprotocol.app/terms support@cortexprotocol.app Disclaimer: Cortex provides educational wellness information and tracking tools. It does not provide medical advice, diagnosis, treatment, or dosing instructions, and is not a substitute for professional medical care. Always consult a qualified healthcare professional before starting any supplement, changing your regimen, or making any medical decision.
Screenshots
Verdict
The clearest difference is review sentiment: Cortex at 100% against ArcX's 0%. Cortex also leads on rating (5.0 vs 1.7) and update cadence (every 11 days vs every 3 weeks). ArcX's advantage is monetization model (freemium vs subscription) and iOS requirement (15.6 vs 17.0). On price, ratings volume, 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
Both are free to download. ArcX sells 2 in-app purchases, starting at $4.99 per month and Cortex sells 2 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.
Cortex holds the better App Store score, 5.0 against 1.7. Both are backed by a comparable volume of ratings — 7 and 5 respectively. Written reviews point the same way: 0% of ArcX's written reviews are positive against 100% of Cortex's.
ArcX ships an update every 3 weeks, Cortex every 11 days. The most recent releases landed on October 27, 2026 and October 23, 2026 respectively.
| Parameter | ArcX | Cortex |
|---|---|---|
| Price | Free | Free |
| Rating | 1.7 (7 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 — better | 5 |
| Update frequency | Every 3 weeks | Every 11 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium — better | Subscription |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 80 MB | 11 MB |
| Age rating | 4+ | 17+ |
| Developer | ArcX Technology Ltd | Grimes AI LLC |
Customer experience
ArcX
Cortex
In-app purchases
ArcX
- Arcx Premium14 Days trial$4.991 Month
- Arcx Premium14 Days trial$49.991 Year
Cortex
- Cortex (Monthly)1 Month trial$19.991 Month
- Cortex (Annual)1 Year trial$139.991 Year









