# Batrium BMI vs TUNZE

The clearest difference is review sentiment: Batrium BMI at 100% against TUNZE's 0%. Batrium BMI also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). 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.

Batrium BMI ships an update every 6 weeks, TUNZE every 2 months. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Batrium BMI | TUNZE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/batrium-bmi/id6475325576/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 61 MB | 67 MB |
| Requires iOS | **12.2** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Batrium Technologies Pty Ltd](https://appshunter.io/developer/1489556424) | [fynix GmbH](https://appshunter.io/developer/1733023937) |

## 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


### TUNZE

[App page](https://appshunter.io/ios/app/tunze/id6499044488)

Control TUNZE devices like pumps and controllers from a central app. It offers analysis and maintenance features for marine aquariums, helping to stabilize water chemistry and technology for a healthy environment.

**Highlights:** Centralized device control, Pump and controller management, Intelligent accessory features, Water chemistry analysis, Maintenance tracking, Marine aquarium companion

**Features:** macOS Compatibility, Family Sharing

**In-app purchases:** none


## Frequently asked questions

### Is Batrium BMI free?

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

### Is TUNZE free?

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

### Do Batrium BMI or TUNZE have ads?

TUNZE shows ads; Batrium BMI does not.

### Which is updated more often, Batrium BMI or TUNZE?

Batrium BMI ships an update every 6 weeks, and TUNZE every 2 months. Most recently, Batrium BMI was updated on October 7, 2026 and TUNZE on October 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.*