# IDEX Istanbul vs UDI Studio

The clearest difference is update cadence: IDEX Istanbul at every 2 months against UDI Studio's every 4 months. IDEX Istanbul also leads on iOS requirement (15.6 vs 17.0). 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.

IDEX Istanbul ships an update every 2 months, UDI Studio every 4 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | IDEX Istanbul | UDI Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 30 MB | 2 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [DİŞSİAD](https://appshunter.io/developer/1684552679) | [Enes Oztrk](https://appshunter.io/developer/1883719755) |

## What reviewers say

### IDEX Istanbul

[App page](https://appshunter.io/ios/app/idex-istanbul/id6448393906)

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

**In-app purchases:** none


### UDI Studio

[App page](https://appshunter.io/ios/app/udi-studio/id6760301084)

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

**In-app purchases:** none


## Frequently asked questions

### Is IDEX Istanbul free?

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

### Is UDI Studio free?

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

### Do IDEX Istanbul or UDI Studio have ads?

Neither IDEX Istanbul nor UDI Studio shows ads.

### Which is updated more often, IDEX Istanbul or UDI Studio?

IDEX Istanbul ships an update every 2 months, and UDI Studio every 4 months. Most recently, IDEX Istanbul was updated on October 25, 2026 and UDI Studio on October 25, 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.*