Calibration Keeper vs W
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calibration Keeper
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Calibration Keeper is a product of Trihydro Corporation designed to help teams capture, store, and report data related to the calibration of equipment used in the field for Leak Detection and Repair.
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.
Screenshots
Verdict
The clearest difference is update cadence: W at every 3 months against Calibration Keeper's every 16 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.
Calibration Keeper ships an update every 16 months, W every 3 months. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.
| Parameter | Calibration Keeper | W |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 16 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15 — better |
| Further details — not scored | ||
| Size | 22 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Trihydro Corporation | LumenRadio AB |
In-app purchases
Calibration Keeper
No in-app purchases
W
No in-app purchases
Questions
Is Calibration Keeper free?
Is W free?
Do Calibration Keeper or W have ads?
Which is updated more often, Calibration Keeper or W?
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