# Vonix Flex vs XSIM

The clearest difference is in-app purchases: Vonix Flex at none against XSIM's 4. Vonix Flex also leads on iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. XSIM sells 4 one-off in-app purchases. Vonix Flex asks for nothing beyond the download.

## The numbers

| Metric | Vonix Flex | XSIM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Size | 85 MB | 40 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Vonix, LLC](https://appshunter.io/developer/1560673435) | [Zeust Ltd](https://appshunter.io/developer/1696570314) |

## What reviewers say

### Vonix Flex

[App page](https://appshunter.io/ios/app/vonix-flex/id1560673433)

**Features:** macOS Compatibility

**In-app purchases:** none


### XSIM

[App page](https://appshunter.io/ios/app/xsim/id6812277915)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| US$3 wallet credit | $2.99 | one-time |
| US$5 wallet credit | $4.99 | one-time |
| US$10 wallet credit | $9.99 | one-time |
| US$20 wallet credit | $19.99 | one-time |


## Frequently asked questions

### Is Vonix Flex free?

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

### Is XSIM free?

XSIM is free to download, with in-app purchases available.

### Do Vonix Flex or XSIM have ads?

Neither Vonix Flex nor XSIM shows ads.

---

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