# BlueBattery vs TwoStrokeRatio

The clearest difference is ads: BlueBattery at none against TwoStrokeRatio's shown. BlueBattery also leads on iOS requirement (13.0 vs 16.4). On price, update cadence, 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.

BlueBattery ships an update every 5 weeks, TwoStrokeRatio every 2 months. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | BlueBattery | TwoStrokeRatio |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 81.8% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 22 MB | 4 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kai Scheffer](https://appshunter.io/developer/816144806) | [Tomasz Bramson](https://appshunter.io/developer/6786572854) |

## 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


### TwoStrokeRatio

[App page](https://appshunter.io/ios/app/twostrokeratio/id6786572851)

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

**In-app purchases:** none


## Frequently asked questions

### Is BlueBattery free?

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

### Is TwoStrokeRatio free?

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

### Do BlueBattery or TwoStrokeRatio have ads?

TwoStrokeRatio shows ads; BlueBattery does not.

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

BlueBattery ships an update every 5 weeks, and TwoStrokeRatio every 2 months. Most recently, BlueBattery was updated on October 11, 2026 and TwoStrokeRatio on October 10, 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.*