# WHX Osaka vs SIGN Istanbul

The clearest difference is iOS requirement: WHX Osaka at 15.5 against SIGN Istanbul's 17.4. On price, update cadence, 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.

WHX Osaka ships an update every 9 days, SIGN Istanbul weekly. The most recent releases landed on July 6, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | WHX Osaka | SIGN Istanbul |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Size | 64 MB | 146 MB |
| Requires iOS | **15.5** | 17.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [informa PLC](https://appshunter.io/developer/1493890777) | [Informa Markets](https://appshunter.io/developer/1464716030) |

## What reviewers say

### WHX Osaka

[App page](https://appshunter.io/ios/app/whx-osaka/id6744591120)

**Features:** macOS Compatibility

**In-app purchases:** none


### SIGN Istanbul

[App page](https://appshunter.io/ios/app/sign-istanbul/id6751111288)

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

**In-app purchases:** none


## Frequently asked questions

### Is WHX Osaka free?

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

### Is SIGN Istanbul free?

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

### Do WHX Osaka or SIGN Istanbul have ads?

Neither WHX Osaka nor SIGN Istanbul shows ads.

### Which is updated more often, WHX Osaka or SIGN Istanbul?

WHX Osaka ships an update every 9 days, and SIGN Istanbul weekly. Most recently, WHX Osaka was updated on July 6, 2026 and SIGN Istanbul on September 17, 2026.

---

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