# OnSite vs Atlas by Salta

The clearest difference is iOS requirement: Atlas by Salta at 15.6 against OnSite's 18.0. 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.

OnSite ships an update every 2 months, Atlas by Salta monthly. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | OnSite | Atlas by Salta |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free | — |
| Size | 8 MB | 122 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UNIPHI (Aus) Pty Ltd](https://appshunter.io/developer/784258210) | [Salta Properties Pty Ltd](https://appshunter.io/developer/1826886490) |

## What reviewers say

### OnSite

[App page](https://appshunter.io/ios/app/onsite/id784258207)

This app helps construction project managers streamline operations across multiple sites. It allows for remote progress tracking, variation justification, audits, and defect management. The app offers offline functionality for viewing documents and synchronizes data when connectivity is restored.

**Highlights:** Track site progress remotely, Justify project variations, Conduct audits and surveillances, Manage project defects, View drawings and documents, Offline mode synchronization

**Features:** macOS Compatibility

**In-app purchases:** none


### Atlas by Salta

[App page](https://appshunter.io/ios/app/atlas-by-salta/id6748661468)

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

**In-app purchases:** none


## Frequently asked questions

### Is OnSite free?

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

### Is Atlas by Salta free?

Atlas by Salta is free to download, with no in-app purchases.

### Do OnSite or Atlas by Salta have ads?

Neither OnSite nor Atlas by Salta shows ads.

### Which is updated more often, OnSite or Atlas by Salta?

OnSite ships an update every 2 months, and Atlas by Salta monthly. Most recently, OnSite was updated on October 11, 2026 and Atlas by Salta on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*