# BigFun VN vs iSystem

The clearest difference is update cadence: iSystem at every 2 days against BigFun VN's fortnightly. 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.

BigFun VN ships an update fortnightly, iSystem every 2 days. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | BigFun VN | iSystem |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Size | 33 MB | 29 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [BIGFUN COMPANY LIMITED](https://appshunter.io/developer/1746433157) | [ISD Corp](https://appshunter.io/developer/1427269446) |

## What reviewers say

### BigFun VN

[App page](https://appshunter.io/ios/app/bigfun-vn/id6502685609)

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

**In-app purchases:** none


### iSystem

[App page](https://appshunter.io/ios/app/isystem/id6737794984)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BigFun VN free?

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

### Is iSystem free?

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

### Do BigFun VN or iSystem have ads?

Neither BigFun VN nor iSystem shows ads.

### Which is updated more often, BigFun VN or iSystem?

BigFun VN ships an update fortnightly, and iSystem every 2 days. Most recently, BigFun VN was updated on October 2, 2026 and iSystem on October 3, 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.*