# Multi vs Ultimate9 BM

The clearest difference is price: Ultimate9 BM at Free against Multi's $9.99. Ultimate9 BM also leads on rating (5.0 vs 3.3) and iOS requirement (10.0 vs 15.0). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

Ultimate9 BM is free to download; Multi costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Ultimate9 BM holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 8 and 3 respectively. Written reviews point the same way: 51% of Multi's written reviews are positive against 57% of Ultimate9 BM's.

## The numbers

| Metric | Multi | Ultimate9 BM |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.3 (8 ratings)](https://appshunter.io/ios/app/multi-batt-mon/id1345741752/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ultimate9-bm/id1525506062/reviews)** |
| Number of ratings | **8** | 3 |
| Positive reviews | 51.3% of reviews | **57.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free | Free |
| Size | 16 MB | 26 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Amoeba New Energy Co., Ltd.](https://appshunter.io/developer/978609032) | [俊华 邹](https://appshunter.io/developer/1276442287) |

## What reviewers say

### Multi

[App page](https://appshunter.io/ios/app/multi-batt-mon/id1345741752)

Monitor multiple 12V vehicle batteries simultaneously with this app. It stores data permanently, allows export and sharing, and provides trip records and expense management. Receive notifications when near your connected devices.

**Highlights:** Monitor multiple 12V vehicle batteries, Supports 4 device connections, Permanent data storage, Data export and sharing, Trip record tracking, Vehicle expense management, Proximity notifications

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Ultimate9 BM

[App page](https://appshunter.io/ios/app/ultimate9-bm/id1525506062)

Monitor your car battery's real-time voltage and test its cranking and charging systems. View all battery data directly on your mobile device via Bluetooth connection.

**Highlights:** Real-time battery voltage monitoring, Cranking system testing, Charging system testing, Bluetooth data transfer, View data on mobile device

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Multi free?

Multi costs $9.99, with no in-app purchases.

### Is Ultimate9 BM free?

Ultimate9 BM is free to download, with no in-app purchases.

### Which has better reviews, Multi or Ultimate9 BM?

Ultimate9 BM is rated higher. Multi averages 3.3 out of 5 from 8 ratings, while Ultimate9 BM averages 5.0 from 3 ratings.

### Do Multi or Ultimate9 BM have ads?

Neither Multi nor Ultimate9 BM shows ads.

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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.*