# Batrium BMI vs Tire Size Calculator +

The clearest difference is rating: Batrium BMI at 3.0 against Tire Size Calculator +'s 1.0. Batrium BMI also leads on ads (none vs shown) and monetization model (free vs ad-supported). Tire Size Calculator +'s advantage is update cadence (every 2 weeks vs every 6 weeks). On price, ratings volume and in-app purchases there is nothing between them.

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

Batrium BMI holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Batrium BMI ships an update every 6 weeks, Tire Size Calculator + every 2 weeks. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Batrium BMI | Tire Size Calculator + |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/batrium-bmi/id6475325576/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/tire-size-calculator-plus/id6790019544/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 61 MB | 49 MB |
| Requires iOS | **12.2** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Batrium Technologies Pty Ltd](https://appshunter.io/developer/1489556424) | [heekyung moon](https://appshunter.io/developer/6779193748) |

## What reviewers say

### Batrium BMI

[App page](https://appshunter.io/ios/app/batrium-bmi/id6475325576)

Monitor the real-time status of your home or large capacity battery system. View crucial battery parameters like cell voltage, overall voltage, current flow, and internal BMS temperature.

**Highlights:** Real-time battery parameter updates, Cell voltage monitoring, Battery voltage display, Current flow tracking, Internal BMS temperature

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

**In-app purchases:** none


### Tire Size Calculator +

[App page](https://appshunter.io/ios/app/tire-size-calculator-plus/id6790019544)

Calculate tire size differences, speedometer errors, and wheel offset changes. Compare tire dimensions, find alternative sizes, and visualize wheel fitment. Save your car's tire sizes for quick access.

**Highlights:** Compare two tire sizes, Calculate speedometer and odometer error, Find plus and alternative tire sizes, Analyze wheel offset and rim width, Reference sidewall information, Save car tire sizes to 'My Garage'

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

**In-app purchases:** none


## Frequently asked questions

### Is Batrium BMI free?

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

### Is Tire Size Calculator + free?

Tire Size Calculator + is free to download, with no in-app purchases.

### Which has better reviews, Batrium BMI or Tire Size Calculator +?

Batrium BMI is rated higher. Batrium BMI averages 3.0 out of 5 from 1 ratings, while Tire Size Calculator + averages 1.0 from 1 ratings.

### Do Batrium BMI or Tire Size Calculator + have ads?

Tire Size Calculator + shows ads; Batrium BMI does not.

### Which is updated more often, Batrium BMI or Tire Size Calculator +?

Batrium BMI ships an update every 6 weeks, and Tire Size Calculator + every 2 weeks. Most recently, Batrium BMI was updated on November 4, 2026 and Tire Size Calculator + on November 5, 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.*