# Optic Studio vs KALKUL

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.

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.

## The numbers

| Metric | Optic Studio | KALKUL |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Size | 66 MB | 71 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [SBM Sistemi](https://appshunter.io/developer/549519140) | [Kalkul Inc.](https://appshunter.io/developer/1357921921) |

## What reviewers say

### Optic Studio

[App page](https://appshunter.io/ios/app/optic-studio/id554989874)

**Features:** macOS Compatibility

**In-app purchases:** none


### KALKUL

[App page](https://appshunter.io/ios/app/kalkul/id6636494668)

**In-app purchases:** none


## Frequently asked questions

### Is Optic Studio free?

Optic Studio is free to download, with no in-app purchases.

### Is KALKUL free?

KALKUL is free to download, with no in-app purchases.

### Do Optic Studio or KALKUL have ads?

Neither Optic Studio nor KALKUL shows ads.

### Which is updated more often, Optic Studio or KALKUL?

Optic Studio ships an update every 2 months, and KALKUL every 6 days. Most recently, Optic Studio was updated on November 7, 2026 and KALKUL on November 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*