# ACS vs ONSAT

The clearest difference is update cadence: ONSAT at every 2 weeks against ACS's every 11 months. ACS'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.

ACS ships an update every 11 months, ONSAT every 2 weeks. The most recent releases landed on September 18, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | ACS | ONSAT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Size | 13 MB | 82 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IconeSeg TI - Ltda](https://appshunter.io/developer/954023796) | [SITALLCOM SISTEMAS INTELIGENTES LTDA](https://appshunter.io/developer/1526495577) |

## What reviewers say

### ACS

[App page](https://appshunter.io/ios/app/acs/id1465661012)

**Features:** macOS Compatibility

**In-app purchases:** none


### ONSAT

[App page](https://appshunter.io/ios/app/onsat/id1538472707)

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

**In-app purchases:** none


## Frequently asked questions

### Is ACS free?

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

### Is ONSAT free?

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

### Do ACS or ONSAT have ads?

Neither ACS nor ONSAT shows ads.

### Which is updated more often, ACS or ONSAT?

ACS ships an update every 11 months, and ONSAT every 2 weeks. Most recently, ACS was updated on September 18, 2026 and ONSAT on September 24, 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.*