# Optica vs i.Terminal go

The clearest difference is update cadence: i.Terminal go at every 3 months against Optica's every 62 months. Optica's advantage is device support (3 vs 1) and iOS requirement (10.0 vs 13.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Optica ships an update every 62 months, i.Terminal go every 3 months. The most recent releases landed on October 2, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Optica | i.Terminal go |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/optica-app/id930867575/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 92.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 62 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 83 MB | 57 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 17+ |
| Developer | [Luis Cornejo](https://appshunter.io/developer/930867574) | [Carl Zeiss AG](https://appshunter.io/developer/488066215) |

## What reviewers say

### Optica

[App page](https://appshunter.io/ios/app/optica-app/id930867575)

This app assists opticians and optometrists with complex optical calculations. It helps explain optical concepts to clients and includes tools for lens transposition, vertex distance adjustments, and addition calculations.

**Highlights:** Lens transposition with optical cross representation, Distometry for vertex distance power adjustments, Over-correction calculation for toric lenses, Theoretical addition calculation based on age and distance, Approximate lens edge and center thickness calculation

**Features:** macOS Compatibility

**In-app purchases:** none


### i.Terminal go

[App page](https://appshunter.io/ios/app/iterminal-go/id1505807590)

**In-app purchases:** none


## Frequently asked questions

### Is Optica free?

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

### Is i.Terminal go free?

i.Terminal go is free to download, with no in-app purchases.

### Do Optica or i.Terminal go have ads?

Neither Optica nor i.Terminal go shows ads.

### Which is updated more often, Optica or i.Terminal go?

Optica ships an update every 62 months, and i.Terminal go every 3 months. Most recently, Optica was updated on October 2, 2026 and i.Terminal go on September 18, 2026.

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