# BK vs CSD Platform

The clearest difference is update cadence: CSD Platform at every 3 weeks against BK's every 4 months. BK's advantage is iOS requirement (13 vs 17.6). 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.

BK ships an update every 4 months, CSD Platform every 3 weeks. The most recent releases landed on September 18, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | BK | CSD Platform |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 19 MB | 13 MB |
| Requires iOS | **13** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Balancika](https://appshunter.io/developer/1275423172) | [ROYAL GROUP SECURITIES PLC.](https://appshunter.io/developer/6779515892) |

## What reviewers say

### BK

[App page](https://appshunter.io/ios/app/bk-sign/id6444074976)

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

**In-app purchases:** none


### CSD Platform

[App page](https://appshunter.io/ios/app/csd-platform/id6783244259)

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

**In-app purchases:** none


## Frequently asked questions

### Is BK free?

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

### Is CSD Platform free?

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

### Do BK or CSD Platform have ads?

Neither BK nor CSD Platform shows ads.

### Which is updated more often, BK or CSD Platform?

BK ships an update every 4 months, and CSD Platform every 3 weeks. Most recently, BK was updated on September 18, 2026 and CSD Platform on October 10, 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.*