# BlueBattery vs WFS400

The clearest difference is review sentiment: BlueBattery at 82% against WFS400's 0%. WFS400's advantage is update cadence (fortnightly vs every 5 weeks) and iOS requirement (10.0 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

BlueBattery ships an update every 5 weeks, WFS400 fortnightly. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | BlueBattery | WFS400 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/wfs400/id1548218818/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **81.8% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free | Free |
| Size | 22 MB | 27 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kai Scheffer](https://appshunter.io/developer/816144806) | [SEO Electronics s.c.](https://appshunter.io/developer/1488373392) |

## What reviewers say

### BlueBattery

[App page](https://appshunter.io/ios/app/bluebattery/id1233388568)

Monitor and record vital electrical parameters of your RV battery system in real-time. View live data, energy mix, and historical records for diagnostics. Configure settings and update device firmware.

**Highlights:** Real-time electrical parameter display, Simultaneous connection for energy overview, Historical data for diagnostics, Export data to CSV, Device configuration and settings, Firmware updates

**Features:** macOS Compatibility

**In-app purchases:** none


### WFS400

[App page](https://appshunter.io/ios/app/wfs400/id1548218818)

This application allows you to disarm your vehicle's anti-theft immobilizer using your smartphone. It offers automatic unlocking when you approach your car and supports pairing multiple phones or wireless transmitters.

**Highlights:** Smartphone-based immobilizer disarming, Automatic car unlocking via proximity, Pair up to 8 phones or transmitters, Background operation, PIN code backup

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BlueBattery free?

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

### Is WFS400 free?

WFS400 is free to download, with no in-app purchases.

### Do BlueBattery or WFS400 have ads?

Neither BlueBattery nor WFS400 shows ads.

### Which is updated more often, BlueBattery or WFS400?

BlueBattery ships an update every 5 weeks, and WFS400 fortnightly. Most recently, BlueBattery was updated on October 11, 2026 and WFS400 on October 24, 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.*