# FJD Trion Model vs Sat

The clearest difference is device support: Sat at 3 against FJD Trion Model's 1. 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.

FJD Trion Model ships an update every 2 months, Sat every 5 weeks. The most recent releases landed on August 24, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | FJD Trion Model | Sat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 523 MB | 409 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [FJDynamics Europe Spzoo](https://appshunter.io/developer/1859583079) | [Geosolution i Goteborg AB](https://appshunter.io/developer/6776122441) |

## What reviewers say

### FJD Trion Model

[App page](https://appshunter.io/ios/app/fjd-trion-model/id6478516371)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sat

[App page](https://appshunter.io/ios/app/sat-slam/id6776122439)

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

**In-app purchases:** none


## Frequently asked questions

### Is FJD Trion Model free?

FJD Trion Model is free to download, with no in-app purchases.

### Is Sat free?

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

### Do FJD Trion Model or Sat have ads?

Neither FJD Trion Model nor Sat shows ads.

### Which is updated more often, FJD Trion Model or Sat?

FJD Trion Model ships an update every 2 months, and Sat every 5 weeks. Most recently, FJD Trion Model was updated on August 24, 2026 and Sat on September 20, 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.*