# ISRTRI vs Urban Studio

The clearest difference is update cadence: ISRTRI at weekly against Urban Studio's every 11 months. Urban Studio's advantage is iOS requirement (15.1 vs 18.6). 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.

ISRTRI ships an update weekly, Urban Studio every 11 months. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | ISRTRI | Urban Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 11 months |
| Size | 17 MB | 48 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ran kellner](https://appshunter.io/developer/1372973121) | [Arbox LTD](https://appshunter.io/developer/1021244486) |

## What reviewers say

### ISRTRI

[App page](https://appshunter.io/ios/app/isrtri/id1546991465)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Urban Studio

[App page](https://appshunter.io/ios/app/urban-studio/id6476058607)

**In-app purchases:** none


## Frequently asked questions

### Is ISRTRI free?

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

### Is Urban Studio free?

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

### Do ISRTRI or Urban Studio have ads?

Neither ISRTRI nor Urban Studio shows ads.

### Which is updated more often, ISRTRI or Urban Studio?

ISRTRI ships an update weekly, and Urban Studio every 11 months. Most recently, ISRTRI was updated on October 2, 2026 and Urban Studio on October 7, 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.*