Fox Marine vs BPK
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fox Marine
This app connects to marine engine gateways via Bluetooth to display real-time engine data on your iPhone or iPad. It offers table-format viewing with adjustable font sizes and the ability to read and clear engine codes.
- Bluetooth engine gateway connection
- Real-time engine data display
- Table view with adjustable font size
- Read and clear engine codes
- Supports various ECM models
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The Fox Marine App connects to Fox Marine Engine Gateways via Bluetooth to display your boat's engine data on your iPhone or iPad. Engine Gateways are available for MEFI-1/2/3/4/5/6 ECMs, Motorola ECM/PCM 555 variants, ECM-07/08 (Volvo Penta 3G/4G, PCM/Crusader 3G/4G, Indmar 3G/4G, Ilmor 4G), and PCM-09. Engine data is viewable in table (list view) format with options for either normal font or large font size. The ability to read and clear engine codes is now available for all Engine Gateways. Fox Marine Engine Gateways are available at http://fox-marine.com. Data from twin engines cannot be viewed simultaneously with this App (users must switch between each engine on the engine gateway selection screen).
BPK
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.
- 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
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Shaft Voltage Detection Device Helwig Carbon’s Shaft Voltage Detection Device otherwise known as the BPK-Probe™ is an instrument designed to measure common mode voltage on a motor shaft and determine the risk of discharge through the motor bearings. It also has the capability to switch in Helwig’s Bearing Protection solution. This feature allows the user to measure the performance of our grounding device and the risk of further damage to the motor bearings once installed. The BPK-Probe™ comes as part of a complete kit including everything you need to test motor shafts or other devices where damaging discharges may be present. This Mobile App is offered as a solution to record and maintain readings
Screenshots
Verdict
The clearest difference is price: BPK at Free against Fox Marine's $4.99. BPK also leads on review sentiment (100% vs 80%). Fox Marine's advantage is rating (4.6 vs 4.2). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
BPK is free to download; Fox Marine costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Fox Marine holds the better App Store score, 4.6 against 4.2. Both are backed by a comparable volume of ratings — 11 and 5 respectively. Written reviews complicate that: 80% of Fox Marine's written reviews are positive against 100% of BPK's, so the app with the better star average is not the one people write more warmly about.
Fox Marine ships an update every 2 months, BPK every 5 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | Fox Marine | BPK |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.6 (11 ratings) — better | 4.2 (5 ratings) |
| Positive reviews | 80.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 11 — better | 5 |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Allen Murrow | Sabhya Technologies LLC |
Customer experience
Fox Marine
BPK
In-app purchases
Fox Marine
No in-app purchases
BPK
No in-app purchases
