ZEISS Observe vs CNS+
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ZEISS Observe
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The ZEISS Observe App connects an iPhone securely and wirelessly directly in the operating room to a ZEISS device via the integrated WiFi hotspot. Students and fellows can use an iPhone to follow the surgery either on the screen or immersive in VR. The App can stream the live video from ZEISS EXTARO 300, ZEISS TIVATO 700 and ZEISS KINEVO 900.
CNS+
Access a comprehensive collection of neurological surgery educational resources, including guidelines, publications, and courses. Manage your professional development with features like 'My Education' and 'My CME'.
- CNS Guidelines access
- CNS Publications access
- My Education & My CME integration
- Case of the Month
- Neurosurgery Watch
- Podcasts
- Courses & Webinars
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CNS+ houses all the CNS online education and apps you love in one convenient place! Download the app today and access CNS Guidelines, CNS Publications and CNS education in the palm of your hand. CNS+ also integrates with your CNS profile and enables access to "My Education" and "My CME". Features include: - Case of the Month - Neurosurgery Watch - Podcasts - CNS Spotlight - Neurosurgery Surgery Survival Guide - Nexus - Courses - Webinars - And more!
Screenshots
Verdict
ZEISS Observe and CNS+ are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
ZEISS Observe ships an update every 7 months, CNS+ every 4 months. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.
| Parameter | ZEISS Observe | CNS+ |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 7 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 39 MB | 116 MB |
| Age rating | 17+ | 17+ |
| Developer | Carl Zeiss AG | Congress of Neurological Surgeons |
In-app purchases
ZEISS Observe
No in-app purchases
CNS+
No in-app purchases
