# TC Mobile I/O vs sDrives

The clearest difference is in-app purchases: TC Mobile I/O at none against sDrives's 1. sDrives's advantage is update cadence (every 2 months vs every 28 months). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. sDrives sells 1 one-off in-app purchase. TC Mobile I/O asks for nothing beyond the download.

TC Mobile I/O ships an update every 28 months, sDrives every 2 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | TC Mobile I/O | sDrives |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (27 ratings)](https://appshunter.io/ios/app/sdrives-vfd-help/id1238863129/reviews)** |
| Number of ratings | — | **27** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 12 MB |
| Requires iOS | **11.0.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Phoenix Contact GmbH & Co. KG](https://appshunter.io/developer/426916392) | [Evgeny Makarenkov](https://appshunter.io/developer/1214502122) |

## What reviewers say

### TC Mobile I/O

[App page](https://appshunter.io/ios/app/tc-mobile-io/id1139160079)

Control your TC MOBILE I/O X200 SMS relay with this application. It displays device status and sends commands, eliminating the need for manual SMS writing. Access datasheets and switch between German and English languages.

**Highlights:** Device status indication, Send switching commands, Eliminates manual SMS writing, Data sheet download, Multilingual support (German, English)

**Features:** macOS Compatibility

**In-app purchases:** none


### sDrives

[App page](https://appshunter.io/ios/app/sdrives-vfd-help/id1238863129)

Access alarm descriptions, troubleshooting guides, and user manuals for Siemens drives. This professional tool provides essential information for commissioning and service, supporting a wide range of drive models.

**Highlights:** Quick alarm description access, Troubleshooting guides, Links to user manuals, Support for multiple Siemens drive models, Multi-language alarm descriptions, In-app purchase to unlock all drives

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Drives | $1.99 | one-time |


## Frequently asked questions

### Is TC Mobile I/O free?

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

### Is sDrives free?

sDrives is free to download, with in-app purchases available.

### Do TC Mobile I/O or sDrives have ads?

Neither TC Mobile I/O nor sDrives shows ads.

### Which is updated more often, TC Mobile I/O or sDrives?

TC Mobile I/O ships an update every 28 months, and sDrives every 2 months. Most recently, TC Mobile I/O was updated on November 2, 2026 and sDrives on November 2, 2026.

---

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