# iO vs I/O Field

The clearest difference is update cadence: iO at every 7 months against I/O Field's every 14 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

iO ships an update every 7 months, I/O Field every 14 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | iO | I/O Field |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/io-fly/id1004071859/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 14 months |
| Monetization | Free | — |
| Size | 11 MB | 123 MB |
| Requires iOS | 13.0 | **12.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lemonage Software](https://appshunter.io/developer/1004071858) | [WAGO Kontakttechnik GmbH & Co. KG](https://appshunter.io/developer/726217018) |

## What reviewers say

### iO

[App page](https://appshunter.io/ios/app/io-fly/id1004071859)

This application works with specific hardware to configure, calibrate, and monitor sensor and actuator devices that adhere to the IO-Link standard.

**Highlights:** Configure IO-Link devices, Calibrate sensor devices, Monitor actuator devices, Supports IO-Link standard, Works with iO-Fly hardware

**Features:** macOS Compatibility

**In-app purchases:** none


### I/O Field

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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is iO free?

iO 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 iO or I/O Field have ads?

Neither iO nor I/O Field shows ads.

### Which is updated more often, iO or I/O Field?

iO ships an update every 7 months, and I/O Field every 14 months. Most recently, iO was updated on November 1, 2026 and I/O Field on October 30, 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.*