# Keystone PMG vs Bixpy

The clearest difference is update cadence: Bixpy at every 4 weeks against Keystone PMG's every 2 months. Keystone PMG's advantage is iOS requirement (12.1 vs 15.1). 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.

Keystone PMG ships an update every 2 months, Bixpy every 4 weeks. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Keystone PMG | Bixpy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/bixpy/id6445811818/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | — | Free |
| Size | 146 MB | 39 MB |
| Requires iOS | **12.1** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ONR Applications LLC](https://appshunter.io/developer/1482224376) | [Bixpy LLC](https://appshunter.io/developer/1673928038) |

## What reviewers say

### Keystone PMG

[App page](https://appshunter.io/ios/app/keystone-pmg/id1629150945)

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

**In-app purchases:** none


### Bixpy

[App page](https://appshunter.io/ios/app/bixpy/id6445811818)

Connect to Bixpy Outboard batteries to update firmware or access support. This app facilitates battery management and provides a platform for submitting repair or warranty claims.

**Highlights:** Connect to Bixpy Outboard batteries, Update battery firmware, Launch support tickets, Submit repair claims, Submit warranty claims

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

**In-app purchases:** none


## Frequently asked questions

### Is Keystone PMG free?

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

### Is Bixpy free?

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

### Do Keystone PMG or Bixpy have ads?

Neither Keystone PMG nor Bixpy shows ads.

### Which is updated more often, Keystone PMG or Bixpy?

Keystone PMG ships an update every 2 months, and Bixpy every 4 weeks. Most recently, Keystone PMG was updated on October 2, 2026 and Bixpy on October 3, 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.*