# BPK vs RRTool

The clearest difference is update cadence: BPK at every 5 weeks against RRTool's every 4 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.

BPK ships an update every 5 weeks, RRTool every 4 months. The most recent releases landed on September 14, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | BPK | RRTool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/bpk-probe-datalink/id1547084540/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 4 months |
| Monetization | Ad-supported | — |
| Size | 37 MB | 5 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sabhya Technologies LLC](https://appshunter.io/developer/1533158995) | [Bay Area Instruments Inc.](https://appshunter.io/developer/1649065401) |

## What reviewers say

### BPK

[App page](https://appshunter.io/ios/app/bpk-probe-datalink/id1547084540)

This utility app measures common mode voltage on motor shafts to assess bearing discharge risk. It can also test the performance of bearing protection solutions, recording and maintaining readings for analysis.

**Highlights:** Measures common mode voltage on motor shafts, Assesses risk of discharge through motor bearings, Tests performance of bearing protection solutions, Records and maintains readings, Complete kit for testing

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

**In-app purchases:** none


### RRTool

[App page](https://appshunter.io/ios/app/rrtool/id6443753484)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BPK free?

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

### Is RRTool free?

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

### Do BPK or RRTool have ads?

Neither BPK nor RRTool shows ads.

### Which is updated more often, BPK or RRTool?

BPK ships an update every 5 weeks, and RRTool every 4 months. Most recently, BPK was updated on September 14, 2026 and RRTool on September 16, 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.*