yACK FAST vs Embedded Slave
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
yACK FAST
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Tool for using BlueSnap M6A wireless module, Scanfob® Brand RFID-NFC reader/writers, Scanfob® Brand BLE barcode scanners -View, and setup module parameters -Chat in STEAM mode with UART connected devices. -Show data like sensor readings, barcode/NFC/UHF scans. -Send scanner commands -Get RSSI readings from nearby BLE devices -Bluetooth Smart terminal function -Easy command history Serialio.com provides BLE app development libraries used in this app
Embedded Slave
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由凯扬电子推出的服务全球汽车锁匠的高效 App，可以通过蓝牙连接蓝牙（串口）子机，从而实现汽车智能卡生成、智能感应信号强度调整、智能卡信息读取等等功能。
Screenshots
Verdict
The clearest difference is update cadence: Embedded Slave at fortnightly against yACK FAST's every 2 months. Embedded Slave also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support 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.
yACK FAST ships an update every 2 months, Embedded Slave fortnightly. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.
| Parameter | yACK FAST | Embedded Slave |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Serialio Ltd. | Wuxi Kaiyang Electronic Technology Co., Ltd. |
In-app purchases
yACK FAST
No in-app purchases
Embedded Slave
No in-app purchases
