# DataOnline Asset Viewer vs Catalyst by APSM

The clearest difference is rating: Catalyst by APSM at 5.0 against DataOnline Asset Viewer's 2.2. DataOnline Asset Viewer's advantage is update cadence (every 2 months vs every 7 months). On price, ratings volume, 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.

Catalyst by APSM holds the better App Store score, 5.0 against 2.2. Both are backed by a comparable volume of ratings — 5 and 2 respectively.

DataOnline Asset Viewer ships an update every 2 months, Catalyst by APSM every 7 months. The most recent releases landed on June 1, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | DataOnline Asset Viewer | Catalyst by APSM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (5 ratings)](https://appshunter.io/ios/app/dataonline-asset-viewer/id1296279142/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/catalyst-by-apsm/id6480323124/reviews)** |
| Number of ratings | **5** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 21 MB | 45 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DataOnline LLC](https://appshunter.io/developer/1296279141) | [APSM, LLC](https://appshunter.io/developer/1738694056) |

## What reviewers say

### DataOnline Asset Viewer

[App page](https://appshunter.io/ios/app/dataonline-asset-viewer/id1296279142)

Access critical information and manage alerts remotely. This mobile tool allows users to view and acknowledge notifications, alarms, and alerts on their iPhone for quick decision-making.

**Highlights:** View notifications, alerts, and alarms, Acknowledge critical information, Remote access to data, On-the-go functionality, Quick decision-making support

**Features:** macOS Compatibility

**In-app purchases:** none


### Catalyst by APSM

[App page](https://appshunter.io/ios/app/catalyst-by-apsm/id6480323124)

This mobile application enhances field operations for the APSM Software Platform. It allows users to perform tasks like logging, inspections, and managing work orders. Access essential documents and asset information conveniently, both online and offline.

**Highlights:** Online and offline field operations, Logging and inspections, Corrective work orders, Download and review SOPs, MPs, TOS, P&IDs, Access asset information

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

**In-app purchases:** none


## Frequently asked questions

### Is DataOnline Asset Viewer free?

DataOnline Asset Viewer is free to download, with no in-app purchases.

### Is Catalyst by APSM free?

Catalyst by APSM is free to download, with no in-app purchases.

### Which has better reviews, DataOnline Asset Viewer or Catalyst by APSM?

Catalyst by APSM is rated higher. DataOnline Asset Viewer averages 2.2 out of 5 from 5 ratings, while Catalyst by APSM averages 5.0 from 2 ratings.

### Do DataOnline Asset Viewer or Catalyst by APSM have ads?

Neither DataOnline Asset Viewer nor Catalyst by APSM shows ads.

### Which is updated more often, DataOnline Asset Viewer or Catalyst by APSM?

DataOnline Asset Viewer ships an update every 2 months, and Catalyst by APSM every 7 months. Most recently, DataOnline Asset Viewer was updated on June 1, 2026 and Catalyst by APSM on September 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.*