# BK vs Material Removal Rate

The clearest difference is price: BK at Free against Material Removal Rate's $1.99. BK also leads on update cadence (every 3 months vs every 8 months) and iOS requirement (9.0 vs 16.2). On ads, in-app purchases and device support there is nothing between them.

BK is free to download; Material Removal Rate costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BK ships an update every 3 months, Material Removal Rate every 8 months. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | BK | Material Removal Rate |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 8 months |
| Size | 2 MB | 3 MB |
| Requires iOS | **9.0** | 16.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Open Road Solutions, Inc.](https://appshunter.io/developer/1445494820) | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) |

## What reviewers say

### BK

[App page](https://appshunter.io/ios/app/bk-t1-tool/id1458588111)

**Features:** macOS Compatibility

**In-app purchases:** none


### Material Removal Rate

[App page](https://appshunter.io/ios/app/material-removal-rate/id6503178665)

**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 Material Removal Rate free?

Material Removal Rate costs $1.99, with no in-app purchases.

### Do BK or Material Removal Rate have ads?

Neither BK nor Material Removal Rate shows ads.

### Which is updated more often, BK or Material Removal Rate?

BK ships an update every 3 months, and Material Removal Rate every 8 months. Most recently, BK was updated on October 25, 2026 and Material Removal Rate 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.*