# TREX.PARTS vs SIMLEA+

The clearest difference is update cadence: SIMLEA+ at every 5 weeks against TREX.PARTS's every 17 months. TREX.PARTS's advantage is iOS requirement (13.0 vs 18.0). 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.

TREX.PARTS ships an update every 17 months, SIMLEA+ every 5 weeks. The most recent releases landed on October 19, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | TREX.PARTS | SIMLEA+ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 5 weeks** |
| Size | 7 MB | 53 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [TREX.PARTS GmbH & Co. KG](https://appshunter.io/developer/1483048834) | [simlea GmbH](https://appshunter.io/developer/1458118346) |

## What reviewers say

### TREX.PARTS

[App page](https://appshunter.io/ios/app/trexparts/id1483048835)

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

**In-app purchases:** none


### SIMLEA+

[App page](https://appshunter.io/ios/app/simlea-plus/id6474276159)

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

**In-app purchases:** none


## Frequently asked questions

### Is TREX.PARTS free?

TREX.PARTS is free to download, with no in-app purchases.

### Is SIMLEA+ free?

SIMLEA+ is free to download, with no in-app purchases.

### Do TREX.PARTS or SIMLEA+ have ads?

Neither TREX.PARTS nor SIMLEA+ shows ads.

### Which is updated more often, TREX.PARTS or SIMLEA+?

TREX.PARTS ships an update every 17 months, and SIMLEA+ every 5 weeks. Most recently, TREX.PARTS was updated on October 19, 2026 and SIMLEA+ on October 18, 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.*