# Cat® Power OnSite vs Welm

The clearest difference is rating: Welm at 5.0 against Cat® Power OnSite's 3.7. Welm also leads on update cadence (every 10 days vs every 3 months). Cat® Power OnSite's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On price, ratings volume and ads there is nothing between them.

Both are free to download. Welm sells 1 one-off in-app purchase. Cat® Power OnSite asks for nothing beyond the download.

Welm holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

Cat® Power OnSite ships an update every 3 months, Welm every 10 days. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Cat® Power OnSite | Welm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/cat-power-onsite/id1438562258/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/welm-task-manager/id6752449247/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 30 MB | 31 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Caterpillar Inc.](https://appshunter.io/developer/571668770) | [Jerry Chang](https://appshunter.io/developer/1839356548) |

## What reviewers say

### Cat® Power OnSite

[App page](https://appshunter.io/ios/app/cat-power-onsite/id1438562258)

Connect to your engine wirelessly to transfer data to your mobile device. This app helps maximize the value of your assets, regardless of fleet size or digital experience. Requires a specific dongle to function.

**Highlights:** Wireless engine data transfer, CAN/J1939 data link connection, Maximize asset value, Fleet management support, Requires specific dongle

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

**In-app purchases:** none


### Welm

[App page](https://appshunter.io/ios/app/welm-task-manager/id6752449247)

This task manager helps you regain control of your day with a no-nonsense approach. It's designed to keep you focused on what truly matters, offering a stark and unapologetic way to manage your to-do list.

**Highlights:** Task management, To-do list creation, Focus enhancement, Daily control, Unapologetic design

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 2nd List | $3.99 | one-time |


## Frequently asked questions

### Is Cat® Power OnSite free?

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

### Is Welm free?

Welm is free to download, with in-app purchases available.

### Which has better reviews, Cat® Power OnSite or Welm?

Welm is rated higher. Cat® Power OnSite averages 3.7 out of 5 from 3 ratings, while Welm averages 5.0 from 2 ratings.

### Do Cat® Power OnSite or Welm have ads?

Neither Cat® Power OnSite nor Welm shows ads.

### Which is updated more often, Cat® Power OnSite or Welm?

Cat® Power OnSite ships an update every 3 months, and Welm every 10 days. Most recently, Cat® Power OnSite was updated on November 2, 2026 and Welm on October 30, 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.*