# METSyS Current Logger vs I/O Field

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.

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.

## The numbers

| Metric | METSyS Current Logger | I/O Field |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 12 months** | Every 14 months |
| Size | 25 MB | 123 MB |
| Requires iOS | 13.0 | **12.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GMC-I PROSyS Ltd](https://appshunter.io/developer/1444875054) | [WAGO Kontakttechnik GmbH & Co. KG](https://appshunter.io/developer/726217018) |

## What reviewers say

### METSyS Current Logger

[App page](https://appshunter.io/ios/app/metsys-current-logger/id1444875055)

**Features:** macOS Compatibility

**In-app purchases:** none


### I/O Field

[App page](https://appshunter.io/ios/app/io-field/id1475074379)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is METSyS Current Logger free?

METSyS Current Logger is free to download, with no in-app purchases.

### Is I/O Field free?

I/O Field is free to download, with no in-app purchases.

### Do METSyS Current Logger or I/O Field have ads?

Neither METSyS Current Logger nor I/O Field shows ads.

### Which is updated more often, METSyS Current Logger or I/O Field?

METSyS Current Logger ships an update every 12 months, and I/O Field every 14 months. Most recently, METSyS Current Logger was updated on September 13, 2026 and I/O Field on September 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*