Batrium BMI vs TUNZE
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Batrium BMI
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.
- Real-time battery parameter updates
- Cell voltage monitoring
- Battery voltage display
- Current flow tracking
- Internal BMS temperature
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This application will enable you to monitor the state of your home/large capacity battery. - Watchmon BMS displays all important battery parameters and updates them in real time. - Cell Voltage, battery voltage, real time current flow, battery and internal BMS temperature
TUNZE
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.
- Centralized device control
- Pump and controller management
- Intelligent accessory features
- Water chemistry analysis
- Maintenance tracking
- Marine aquarium companion
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With the TUNZE App, you can control your TUNZE devices centrally, clearly and at any time – whether it’s pumps, controllers or intelligent accessory features. At the same time, the app includes all proven analysis and maintenance features of the former Reef Assistant – now completely free! This makes TUNZE the complete companion for a stable, healthy and easily maintained marine aquarium. Our philosophy: Record values, correct them, stabilize them. Optimal water chemistry and reliable technology are the foundation of a successful reef aquarium. Legal Information Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Use: https://app.tunze.com/tunze/en/terms-of-use Privacy Policy: https://app.tunze.com/tunze/en/data-terms Imprint: https://app.tunze.com/tunze/en/imprint More information: https://app.tunze.com
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Batrium BMI | TUNZE |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.2 — better | 15.1 |
| Further details — not scored | ||
| Size | 61 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Batrium Technologies Pty Ltd | fynix GmbH |
Customer experience
Batrium BMI
TUNZE
In-app purchases
Batrium BMI
No in-app purchases
TUNZE
No in-app purchases
