# SDSAT vs iSat

The clearest difference is update cadence: iSat at every 4 months against SDSAT's every 20 months. SDSAT's advantage is iOS requirement (11.0 vs 15.1). 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.

SDSAT ships an update every 20 months, iSat every 4 months. The most recent releases landed on October 4, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | SDSAT | iSat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 4 months** |
| Size | 43 MB | 50 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Maciel Sousa](https://appshunter.io/developer/854649008) | [Sygecom Informatica Ltda - ME](https://appshunter.io/developer/1013466685) |

## What reviewers say

### SDSAT

[App page](https://appshunter.io/ios/app/sdsat/id864043401)

**Features:** macOS Compatibility

**In-app purchases:** none


### iSat

[App page](https://appshunter.io/ios/app/isat/id1449023754)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SDSAT free?

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

### Is iSat free?

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

### Do SDSAT or iSat have ads?

Neither SDSAT nor iSat shows ads.

### Which is updated more often, SDSAT or iSat?

SDSAT ships an update every 20 months, and iSat every 4 months. Most recently, SDSAT was updated on October 4, 2026 and iSat on October 1, 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.*