ImpressionIST® vs i
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ImpressionIST®
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This app provides the possibility to remote control all features of the Rodenstock ImpressionIST® via an iPad. Key features: - Find any ImpressionIST® device on the same network as your iPad via its hostname or IP address. - Save desired device as default one to automatically connect to it when the app starts. - Display the ImpressionIST® Web app hosted on corresponding ImpressionIST® device. This gives you full control of the device: manage your customers, perform measurements, and evaluate them. Please note that products and features may vary from country to country (Please contact your local Rodenstock subsidiary for further information).
i
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Medical reminder: Our hardwares have obtained medical certificates issued by CFDA and FDA, that is, the hardware that interacts with this app has received regulatory clearance from China and US. CV-7800 Auto Phoropter @i-Optik is a complete optometry examination solution for your office workflow, which is kept safety with customers. 1.Powerful and simple operation interface. 2.Lens switch fast and smoothly, provide more comfortable optometry experience. 3.Built-in client files management function, easy to retrieve client file. 4.Support data transmission with external devices such as Auto refractometer/Chart Monitor etc. Contact us at webmaster@nbmingsing.com
Verdict
The clearest difference is update cadence: i at every 5 weeks against ImpressionIST®'s every 3 months. 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. Neither carries in-app purchases, so what you see is what you pay.
ImpressionIST® ships an update every 3 months, i every 5 weeks. The most recent releases landed on September 5, 2026 and September 18, 2026 respectively.
| Parameter | ImpressionIST® | i |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPad | iPad |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 22 MB | 166 MB |
| Age rating | 4+ | 12+ |
| Developer | Rodenstock GmbH | 宁波明星科技发展有限公司 |
In-app purchases
ImpressionIST®
No in-app purchases
i
No in-app purchases
