METSyS Current Logger vs I/O Field
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
METSyS Current Logger
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METSyS CURRENT LOGGER APP Easily configure the multi-language METSyS Current Logger, a 3 or 4-phase electrical current monitoring device. Start a new logging session on the METSyS Current Logger by simply inputting the following parameters: • Log name • Logging interval • Logging duration • Include Neutral current measurement Whilst logging, view: • Live reading • Last recorded minimum, maximum, and average readings • Number of logged values View stored logging sessions • View stored logs • Preview graph of logging session either portrait or landscape • View spot measurements on graph App can be configured to display using a various phase colours Export logs Using the app the logs available on the METSyS Current Logger can be viewed and a preview of the data displayed. The log can then be emailed as a CSV file for further analysis.
I/O Field
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The “WAGO I/O Field” app is for monitoring and full operation of the WAGO I/O System Field. This app allows you to display device information for both fieldbus modules and IO-Link hubs, make settings and adjust all device parameters. The communication this requires takes place through the Bluetooth® interface of the mobile device once Data Matrix has been scanned to select the device. Users and the associated access rights can be set up and managed. Outputs can be forced and inputs set in order to support commissioning of systems. The current measured values of a port can be displayed (temperature, voltage, current and states) and configured (including operating mode and filters). Devices can be reset to the factory settings and firmware restarted. License Agreement By downloading the app, you agree to the terms of the WAGO’s license agreement (accessible via EULA and the support URL below).
Screenshots
Verdict
METSyS Current Logger and I/O Field are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
METSyS Current Logger ships an update every 12 months, I/O Field every 14 months. The most recent releases landed on September 13, 2026 and September 8, 2026 respectively.
| Parameter | METSyS Current Logger | I/O Field |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 12 months — better | Every 14 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.4 — better |
| Further details — not scored | ||
| Size | 25 MB | 123 MB |
| Age rating | 4+ | 4+ |
| Developer | GMC-I PROSyS Ltd | WAGO Kontakttechnik GmbH & Co. KG |
In-app purchases
METSyS Current Logger
No in-app purchases
I/O Field
No in-app purchases
Questions
Is METSyS Current Logger free?
Is I/O Field free?
Do METSyS Current Logger or I/O Field have ads?
Which is updated more often, METSyS Current Logger or I/O Field?
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