# KOA 2023 vs KSBNS2025

The clearest difference is update cadence: KOA 2023 at daily against KSBNS2025's every 2 days. KOA 2023 also leads on iOS requirement (11.0 vs 13.0). 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.

KOA 2023 ships an update daily, KSBNS2025 every 2 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | KOA 2023 | KSBNS2025 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 days |
| Size | 55 MB | 61 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [대한정형외과학회](https://appshunter.io/developer/1458330220) | [The Korean Society for Brain and Neural Sciences](https://appshunter.io/developer/1831678333) |

## What reviewers say

### KOA 2023

[App page](https://appshunter.io/ios/app/koa-2023/id6467721314)

**Features:** macOS Compatibility

**In-app purchases:** none


### KSBNS2025

[App page](https://appshunter.io/ios/app/ksbns2025/id6749670141)

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

**In-app purchases:** none


## Frequently asked questions

### Is KOA 2023 free?

KOA 2023 is free to download, with no in-app purchases.

### Is KSBNS2025 free?

KSBNS2025 is free to download, with no in-app purchases.

### Do KOA 2023 or KSBNS2025 have ads?

Neither KOA 2023 nor KSBNS2025 shows ads.

### Which is updated more often, KOA 2023 or KSBNS2025?

KOA 2023 ships an update daily, and KSBNS2025 every 2 days. Most recently, KOA 2023 was updated on November 3, 2026 and KSBNS2025 on October 30, 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.*