# BT1 Tester vs KUNLU BMS

The clearest difference is update cadence: KUNLU BMS at weekly against BT1 Tester's every 5 weeks. BT1 Tester's advantage is iOS requirement (7.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

BT1 Tester ships an update every 5 weeks, KUNLU BMS weekly. The most recent releases landed on October 13, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | BT1 Tester | KUNLU BMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/bt1-tester/id1098097935/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 7 MB | 24 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Leagend Optoelectronics Co., Ltd.](https://appshunter.io/developer/6798210621) | [Kunlu Electronic Technology (shanghai) Co., Ltd](https://appshunter.io/developer/1886024669) |

## What reviewers say

### BT1 Tester

[App page](https://appshunter.io/ios/app/bt1-tester/id1098097935)

This utility app tests 12V car batteries, providing results on their condition, such as good, bad, or needing replacement. It displays the battery's voltage, volume, and overall health.

**Highlights:** Tests 12V car battery voltage, Measures battery volume, Assesses battery health, Displays test results (good, bad, replace)

**In-app purchases:** none


### KUNLU BMS

[App page](https://appshunter.io/ios/app/kunlu-bms/id6760737582)

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

**In-app purchases:** none


## Frequently asked questions

### Is BT1 Tester free?

BT1 Tester is free to download, with no in-app purchases.

### Is KUNLU BMS free?

KUNLU BMS is free to download, with no in-app purchases.

### Do BT1 Tester or KUNLU BMS have ads?

Neither BT1 Tester nor KUNLU BMS shows ads.

### Which is updated more often, BT1 Tester or KUNLU BMS?

BT1 Tester ships an update every 5 weeks, and KUNLU BMS weekly. Most recently, BT1 Tester was updated on October 13, 2026 and KUNLU BMS on October 14, 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.*