Ellips Access vs BK400
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ellips Access
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The EllipsGA Access App enables secure NFC‑based authentication for iPhone XS and later devices. It implements AES‑128 encryption in accordance with FIPS 197 and ISO/IEC 18033‑3 (Block ciphers), ensuring confidentiality of the device’s unique identifier during transmission. The app uses Electronic Codebook (ECB) mode as defined in ISO/IEC 10116 (Modes of operation for block ciphers), with manual zero padding for block alignment. Communication is based on the ISO/IEC 14443‑B NFC standard, providing reliable and standards‑compliant proximity data exchange. The app is designed exclusively for use with EllipsGA access controllers, enabling controlled, hardware‑bound authentication workflows. Key material is generated internally using a deterministic tick‑based expansion method, which is functional but not compliant with ISO/IEC 18031 (Random bit generation). For full standards compliance, deployment environments should replace this with a cryptographically secure random number generator. The application is supported on iPhone XS and newer models, leveraging Apple’s NFC hardware for consistent performance. Compliance Context: • AES‑128 per ISO/IEC 18033‑3 and FIPS 197 • ECB mode per ISO/IEC 10116 • Padding per ISO/IEC 9797‑1 (manual zero padding variant) • NFC communication per ISO/IEC 14443‑B • Key generation requires enhancement to meet ISO/IEC 18031 Demo video - https://share.icloud.com/photos/048UK_g8jR42HILYv7H-lX44A
BK400
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BK400 is a professional Bluetooth car battery diagnostic tool. Connect to BK400 hardware via Bluetooth to monitor real-time voltage, plot live curves, and perform cranking tests, charging tests, and waveform analysis to fully evaluate battery health. Schedule automatic voltage sampling tasks and review historical data with interactive charts across customizable date ranges. Manage multiple devices simultaneously with fully isolated data. Built-in OTA firmware updates keep your device current. Use the vehicle finder to locate your car on a map. Generate professional diagnostic reports with one tap and share them with customers. Supports 15 languages for users worldwide. BK400 是一款专业的汽车蓄电池蓝牙智能检测工具。通过蓝牙连接 BK400 硬件设备,您可以实时监控电池电压、绘制电压曲线,并进行启动测试、充电测试和波形测试,全面评估电池健康状态。支持静态电压采集和定时任务,自动记录历史数据并生成可视化图表,支持按日期范围查看趋势。多设备同时管理,数据完全隔离互不干扰。内置 OTA 固件升级功能,确保设备始终运行最新版本。寻车功能通过地图标注设备位置,轻松找到您的车辆。一键生成包含启动测试与充电测试数据的专业检测报告,方便分享给客户。支持 15 种语言,满足全球用户需求。
Screenshots
Verdict
The clearest difference is update cadence: BK400 at weekly against Ellips Access's every 3 weeks. BK400 also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Ellips Access ships an update every 3 weeks, BK400 weekly. The most recent releases landed on September 16, 2026 and October 25, 2026 respectively.
| Parameter | Ellips Access | BK400 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Ellips | 祖策 谢 |
In-app purchases
Ellips Access
No in-app purchases
BK400
No in-app purchases









