# FASTEC 4 PRO Mobile Client vs API PRO Stock

The clearest difference is update cadence: FASTEC 4 PRO Mobile Client at every 5 months against API PRO Stock's every 10 months. API PRO Stock's advantage is iOS requirement (8.0 vs 14.2). 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.

FASTEC 4 PRO Mobile Client ships an update every 5 months, API PRO Stock every 10 months. The most recent releases landed on September 10, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | FASTEC 4 PRO Mobile Client | API PRO Stock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 10 months |
| Size | 76 MB | 2 MB |
| Requires iOS | 14.2 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [FASTEC GmbH](https://appshunter.io/developer/787083903) | [API Maintenance Systems A/S](https://appshunter.io/developer/589801801) |

## What reviewers say

### FASTEC 4 PRO Mobile Client

[App page](https://appshunter.io/ios/app/fastec-4-pro-mobile-client/id972617776)

**In-app purchases:** none


### API PRO Stock

[App page](https://appshunter.io/ios/app/api-pro-stock/id1400648449)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FASTEC 4 PRO Mobile Client free?

FASTEC 4 PRO Mobile Client is free to download, with no in-app purchases.

### Is API PRO Stock free?

API PRO Stock is free to download, with no in-app purchases.

### Do FASTEC 4 PRO Mobile Client or API PRO Stock have ads?

Neither FASTEC 4 PRO Mobile Client nor API PRO Stock shows ads.

### Which is updated more often, FASTEC 4 PRO Mobile Client or API PRO Stock?

FASTEC 4 PRO Mobile Client ships an update every 5 months, and API PRO Stock every 10 months. Most recently, FASTEC 4 PRO Mobile Client was updated on September 10, 2026 and API PRO Stock 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.*