# Projecta BM500 vs KA CHARGE

The clearest difference is update cadence: KA CHARGE at every 5 weeks against Projecta BM500's every 7 months. KA CHARGE also leads on review sentiment (17% vs 0%). Projecta BM500's advantage is iOS requirement (13.0 vs 15.0). 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.

Projecta BM500 ships an update every 7 months, KA CHARGE every 5 weeks. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Projecta BM500 | KA CHARGE |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | **16.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 24 MB | 23 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TBB Power Co., Ltd](https://appshunter.io/developer/1089239531) | [Kickass Products Pvt Ltd](https://appshunter.io/developer/1387751158) |

## What reviewers say

### 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


### KA CHARGE

[App page](https://appshunter.io/ios/app/ka-charge/id6743463427)

This app provides full control and visibility over your dual battery system. Connect via Bluetooth to configure charging profiles, monitor power input, and view live charge status. Receive real-time alerts for seamless power management on the go.

**Highlights:** Configure charging profiles, Monitor input power, View live charge current, Receive system alerts, Bluetooth connectivity, Real-time data display

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

**In-app purchases:** none


## Frequently asked questions

### Is Projecta BM500 free?

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

### Is KA CHARGE free?

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

### Do Projecta BM500 or KA CHARGE have ads?

Neither Projecta BM500 nor KA CHARGE shows ads.

### Which is updated more often, Projecta BM500 or KA CHARGE?

Projecta BM500 ships an update every 7 months, and KA CHARGE every 5 weeks. Most recently, Projecta BM500 was updated on November 4, 2026 and KA CHARGE on October 30, 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.*