# Alcatraz Cond vs ISI Sys

Alcatraz Cond and ISI Sys 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.

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

Alcatraz Cond ships an update every 11 days, ISI Sys every 2 weeks. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Alcatraz Cond | ISI Sys |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 2 weeks |
| Size | 155 MB | 142 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carrosat](https://appshunter.io/developer/1419734855) | [Intersoft](https://appshunter.io/developer/1480525187) |

## What reviewers say

### Alcatraz Cond

[App page](https://appshunter.io/ios/app/alcatraz-cond/id1543028713)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### ISI Sys

[App page](https://appshunter.io/ios/app/isi-sys/id1628666266)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Alcatraz Cond free?

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

### Is ISI Sys free?

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

### Do Alcatraz Cond or ISI Sys have ads?

Neither Alcatraz Cond nor ISI Sys shows ads.

### Which is updated more often, Alcatraz Cond or ISI Sys?

Alcatraz Cond ships an update every 11 days, and ISI Sys every 2 weeks. Most recently, Alcatraz Cond was updated on October 14, 2026 and ISI Sys on October 11, 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.*