Optic Studio vs KALKUL
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Optic Studio
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This is a product created to allow opticianβs customers to try advantages of the proposed ophthalmic lenses during sale process, even before these lenses will be produced and sold. The principal result is to assist the customer during product choice and to offer to the professionals the best instruments to present modern optical solutions. This App is a great new instrument, very friendly to the user: with your finger touch is possible to have a visual support to explain ophthalmic lenses with a personalized realistic preview of the final result of your professional work. Your products will be sold with much more satisfaction of the customer that will be happier to come back due to the service received from you and your visual marketing support device.
KALKUL
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the feeling of another future [0x036] how does it feel? why are you here, why not on another path of spacetime? you are here because you are curious. you are here because you want to feel more. KALKUL is a sub-movement to explore alternate branches of technology. a KALKUL is something you can collect and experience. download the app and apply for your first KALKUL. a key to a secret space in Tokyo. another future is possible.
Screenshots
Verdict
The clearest difference is update cadence: KALKUL at every 6 days against Optic Studio's every 2 months. Optic Studio's advantage is iOS requirement (10.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Optic Studio ships an update every 2 months, KALKUL every 6 days. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.
| Parameter | Optic Studio | KALKUL |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 6 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPad | iPhone, iPad β better |
| Requires iOS | 10.0 β better | 16.0 |
| Further details β not scored | ||
| Size | 66 MB | 71 MB |
| Age rating | 17+ | 4+ |
| Developer | SBM Sistemi | Kalkul Inc. |
In-app purchases
Optic Studio
No in-app purchases
KALKUL
No in-app purchases









