# Ultimate9 BM vs Projecta BM500

The clearest difference is review sentiment: Ultimate9 BM at 57% against Projecta BM500's 0%. Ultimate9 BM also leads on iOS requirement (10.0 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

## The numbers

| Metric | Ultimate9 BM | Projecta BM500 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ultimate9-bm/id1525506062/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | **57.1% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 7 months |
| Monetization | Free | Free |
| Size | 26 MB | 24 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [俊华 邹](https://appshunter.io/developer/1276442287) | [TBB Power Co., Ltd](https://appshunter.io/developer/1089239531) |

## What reviewers say

### 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


### Projecta BM500

[App page](https://appshunter.io/ios/app/projecta-bm500-bt/id1619339633)

This kit allows users to monitor their battery systems, displaying key information like current, voltage, state of charge, and remaining time. It is compatible with various battery types and voltages, offering accurate measurements for a comprehensive understanding of battery health.

**Highlights:** Real-time current monitoring up to 500A, Supports 12V, 24V, or 48V DC battery systems, Compatible with AGM, GEL, and LFP batteries, Displays voltage, SOC, and time remaining, Accurate current (+/- 0.4%) and voltage (+/- 0.3%) measurements

**In-app purchases:** none


## Frequently asked questions

### Is Ultimate9 BM free?

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

### Is Projecta BM500 free?

Projecta BM500 is free to download, with no in-app purchases.

### Do Ultimate9 BM or Projecta BM500 have ads?

Neither Ultimate9 BM nor Projecta BM500 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.*