# IBST vs 卡兒堡

The clearest difference is update cadence: 卡兒堡 at monthly against IBST's every 5 months. 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.

IBST ships an update every 5 months, 卡兒堡 monthly. The most recent releases landed on October 27, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | IBST | 卡兒堡 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Size | 57 MB | 57 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PHM BUSINESS SOFTWARE CORP.](https://appshunter.io/developer/1794974768) | [JIUNHAU LIN](https://appshunter.io/developer/1517220802) |

## What reviewers say

### IBST

[App page](https://appshunter.io/ios/app/ibst/id1596685171)

**Features:** macOS Compatibility

**In-app purchases:** none


### 卡兒堡

[App page](https://appshunter.io/ios/app/id1636608022)

**In-app purchases:** none


## Frequently asked questions

### Is IBST free?

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

### Is 卡兒堡 free?

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

### Do IBST or 卡兒堡 have ads?

Neither IBST nor 卡兒堡 shows ads.

### Which is updated more often, IBST or 卡兒堡?

IBST ships an update every 5 months, and 卡兒堡 monthly. Most recently, IBST was updated on October 27, 2026 and 卡兒堡 on September 27, 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.*