# BLE Door 4 vs KA CHARGE

The clearest difference is review sentiment: BLE Door 4 at 61% against KA CHARGE's 17%. BLE Door 4 also leads on iOS requirement (6.0 vs 15.0). KA CHARGE's advantage is update cadence (every 5 weeks vs every 7 months). 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.

BLE Door 4 ships an update every 7 months, KA CHARGE every 5 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | BLE Door 4 | KA CHARGE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ble-door-4/id626098309/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **61.3% 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 | 3 MB | 23 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [衍顺 王](https://appshunter.io/developer/626098312) | [Kickass Products Pvt Ltd](https://appshunter.io/developer/1387751158) |

## What reviewers say

### BLE Door 4

[App page](https://appshunter.io/ios/app/ble-door-4/id626098309)

Control residential garage door openers, sliding gate operators, and swing gate motors using your iPhone or iPad. This app leverages Bluetooth 4.0 BLE technology to enable remote opening, closing, and stopping actions.

**Highlights:** Bluetooth 4.0 BLE connectivity, Control garage door openers, Operate sliding gate operators, Manage swing gate motors, Open, close, and stop actions, iPhone and iPad compatible

**Features:** macOS Compatibility

**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 BLE Door 4 free?

BLE Door 4 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 BLE Door 4 or KA CHARGE have ads?

Neither BLE Door 4 nor KA CHARGE shows ads.

### Which is updated more often, BLE Door 4 or KA CHARGE?

BLE Door 4 ships an update every 7 months, and KA CHARGE every 5 weeks. Most recently, BLE Door 4 was updated on November 1, 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.*