Comparison

Cat® Power OnSite vs Welm

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Cat® Power OnSite

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
Read full description

Use the Caterpillar Power OnSite app and dongle to connect with your engine via the CAN/J1939 data link to wirelessly transfer data to your mobile device. Caterpillar created the Power OnSite app specifically for customers to provide information to help you get the most value from your Caterpillar solution. No matter the size of your fleet or level of experience with digital technology, the Power OnSite app will help you maximize the value of your assets. "Requires Cat Part Number 572-8499". This part can be ordered from this link : https://shop.cat.com/en/usa-parts/572-8499 (Buy direct within U.S) https://parts.cat.com/en/catcorp/572-8499 (Outside U.S - purchase through dealer) App requires access permissions to BlueTooth and Location.

About

Welm

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
Read full description

Welm is a to-do list / task manager that's not for the faint-hearted. It's stark, unapologetic, and built to help you take control of your day, stay focused, and do what truly matters. Most productivity apps (like humans) try to do everything - tags, projects, subtasks, automations - until managing the system becomes its own task. Welm says Skitsnack. It's deliberately simple and rigid, with just enough constraints to keep you honest about what actually matters today, instead of letting your to-do list quietly turn into a second job. How it works: — Simple tasks: No smart lists, tags or nested logic to manage. Tasks are meant to be done, not sit beautifully in a database. — Three buckets: Now, Next, Later. That's it. — Finish what's in front of you: Your buckets only hold so much. The only way to do more things is by clearing your tasks. Welm isn't trying to be your friend (it can sometimes be a little rude). It isn't trying to organize and automate your entire life. It's simply making sure the few things that matter to you get done. At least that's what it tells us.

Screenshots

Cat® Power OnSite4 screens
Welm3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Cat® Power OnSite versus Welm: the parameters behind the verdict, then further details
ParameterCat® Power OnSiteWelm
PriceFreeFree
Rating3.7 (3 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings3 — better2
Update frequencyEvery 3 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better18.0
Further details — not scored
Size30 MB31 MB
Age rating4+4+
DeveloperCaterpillar Inc.Jerry Chang

Customer experience

Cat® Power OnSite

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Welm

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Cat® Power OnSite

No in-app purchases

1 purchases

Welm

One-time1
  • 2nd List$3.99

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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