# SIMATIC Notifier vs I/O Field

The clearest difference is iOS requirement: I/O Field at 12.4 against SIMATIC Notifier's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

SIMATIC Notifier ships an update every 10 months, I/O Field every 14 months. Both last shipped on October 16, 2026.

## The numbers

| Metric | SIMATIC Notifier | I/O Field |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 14 months |
| Size | 7 MB | 123 MB |
| Requires iOS | 15.6 | **12.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siemens AG](https://appshunter.io/developer/394503271) | [WAGO Kontakttechnik GmbH & Co. KG](https://appshunter.io/developer/726217018) |

## What reviewers say

### SIMATIC Notifier

[App page](https://appshunter.io/ios/app/simatic-notifier/id1442764496)

**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 SIMATIC Notifier free?

SIMATIC Notifier 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 SIMATIC Notifier or I/O Field have ads?

Neither SIMATIC Notifier nor I/O Field shows ads.

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

SIMATIC Notifier ships an update every 10 months, and I/O Field every 14 months. Most recently, SIMATIC Notifier was updated on October 16, 2026 and I/O Field on October 16, 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.*