HHDLINK vs Zctower
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HHDLINK
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HHDLINK is an APP for logistics supply chain. The smart locks can be linked the application scenarios of the supply chain to realize electronic data handover and secure delivery throughout the whole process which offering a transparent supply chain. The types of smart locks include G-Lock, B-Lock, L-Lock, M-locks, N-Lock,S-Box, T- seals, and Smart Gateways. The functions of each type of product are as follows: G- Lock Lock/Unlock: support remote or Bluetooth operation Password: dynamic password, static password, and authorized sharing NFC: NFC cards configurable, support on-stie and remote operation both ways Setting: devices parameters can be read and modified Trajectory: support to trace and playback the moving paths Fence: route deviation and fence lock/unlock various alarms E-waybill: E-data can be saved and write into devices Video: lock, unlock and tamper will be recorded and upload to server and support remote check. B-Lock Lock/Unlock: support remote or Bluetooth operation Password: dynamic password, static password, and authorized sharing NFC: NFC cards configurable, support on-stie and remote operation both ways Setting: devices parameters can be read and modified Fence: route deviation and fence lock/unlock various alarms Record: support to check the lock/unlock and tamper history L- Lock Lock/Unlock: support remote or Bluetooth operation Password: dynamic password, static password, and authorized sharing NFC: NFC cards configurable, support on-stie and remote operation both ways Setting: devices parameters can be read and modified Fence: route deviation and fence lock/unlock various alarms Reservation command: supports issuing pre-command to unseal LORA locks or set parameters at a specified time. S-Box Lock/Unlock: support remote or Bluetooth operation Password: dynamic password, static password, and authorized sharing NFC: NFC cards configurable, support on-stie and remote operation both ways Setting: devices parameters can be read and modified Trajectory: support to trace and playback the moving paths Fence: route deviation and fence lock/unlock various alarms E-waybill: E-data can be saved and write into devices Video: lock, unlock and tamper will be recorded and upload to server and support remote check. M- Lock Lock/Unlock: support remote or Bluetooth operation Password: dynamic password, static password, and authorized sharing NFC: NFC cards configurable, support on-stie and remote operation both ways Setting: devices parameters can be read and modified N-Lock Lock/Unlock: support remote or Bluetooth operation Record: support to check the lock/unlock and tamper history T-Seal Setting: devices parameters can be read and modified Trajectory: support to trace and playback the moving paths Fence: route deviation and fence lock/unlock various alarms E-waybill: E-data can be saved and write into devices Gateway Slave Locks: support remote command or RFID card to configure slaves locks Password: dynamic password, static password, and authorized sharing NFC: NFC cards configurable, support on-stie and remote operation both ways Setting: devices parameters can be read and modified Trajectory: support to trace and playback the moving paths Fence: route deviation and fence lock/unlock various alarms E-waybill: E-data can be saved and write into devices Video: lock, unlock and tamper will be recorded and upload to server and support remote check.
Zctower
Control smart lock terminal devices remotely. Manage unlocking, locking, key settings, and permissions wirelessly. Collect data from your devices.
- Wireless device control
- Unlocking and locking
- Key setting
- Permission management
- Data collection
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Zhengcheng Smart Lock APP is an application designed by Fuzhou Zhengcheng Lead Seal Co., Ltd. to control terminal devices. It uses wireless technology to realize operations such as unlocking, locking, key setting, permission control, and data collection of terminal devices.
Screenshots
Verdict
The clearest difference is update cadence: Zctower at weekly against HHDLINK's every 5 months. 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.
HHDLINK ships an update every 5 months, Zctower weekly. The most recent releases landed on September 18, 2026 and June 1, 2026 respectively.
| Parameter | HHDLINK | Zctower |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 62 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen HHD Technology Co.,ltd | 福州正城铅封有限公司 |
In-app purchases
HHDLINK
No in-app purchases
Zctower
No in-app purchases









