W vs Zark Update
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
W
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The W-Modbus app has arrived! Upgrade firmware for LumenRadio W-Modbus devices by connecting to and upgrading the LumenRadio Gateway in the network through the app. In the Network map you will find a system overview where you can see signal strength, edit names of wireless nodes as well as seeing the health of the RS485 bus including which Modbus RTU address that is connected to that wireless node. You can also connect to any node in the network and change their name (up to 20 characters). The W-Modbus app requires W-Modbus firmware 3.1.1 and above, which can be downloaded from the LumenRadio support webpage. Note that you need to install FW 3.1.1 or above on the gateway from the nRF connect app to enable the functionality. It is also required to have at least 3.0.0 or above on all nodes in the network. You will need to update all nodes individually if they are on version 2.2.3. This will be the last time this is required. All future updates can be done by either this app or from the nRF connect app.
Zark Update
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This application goes with Zark NI and it helps service Shinkawa sensors and hubs.
Screenshots
Verdict
The clearest difference is iOS requirement: Zark Update at 13.0 against W's 15. On price, update cadence, ads and in-app purchases 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.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 11, 2026 and September 17, 2026 respectively.
| Parameter | W | Zark Update |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15 | 13.0 — better |
| Further details — not scored | ||
| Size | 45 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | LumenRadio AB | SEC of America Incorporated |
In-app purchases
W
No in-app purchases
Zark Update
No in-app purchases
