# Perkins® My Engine vs Cat® Spotters Guide

The clearest difference is update cadence: Perkins® My Engine at every 2 months against Cat® Spotters Guide's every 5 months. 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.

Perkins® My Engine ships an update every 2 months, Cat® Spotters Guide every 5 months. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Perkins® My Engine | Cat® Spotters Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (17 ratings)](https://appshunter.io/ios/app/perkins-my-engine/id1169115342/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | — |
| Size | 49 MB | 73 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Perkins Engines Company Limited](https://appshunter.io/developer/1037004578) | [Caterpillar Inc.](https://appshunter.io/developer/571668770) |

## What reviewers say

### Perkins® My Engine

[App page](https://appshunter.io/ios/app/perkins-my-engine/id1169115342)

Manage the maintenance and service of your Perkins engines with this free app. Receive timely reminders for service intervals, access essential manuals and parts lists, and track service history. Easily locate your nearest Perkins distributor for support and genuine parts.

**Highlights:** Engine serial number validation, Access engine build list and consumables, View Operating Maintenance Manuals (OMM), Service interval reminders, Service history tracking, Locate nearest Perkins distributor

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

**In-app purchases:** none


### Cat® Spotters Guide

[App page](https://appshunter.io/ios/app/cat-spotters-guide/id1598449155)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Perkins® My Engine free?

Perkins® My Engine is free to download, with no in-app purchases.

### Is Cat® Spotters Guide free?

Cat® Spotters Guide is free to download, with no in-app purchases.

### Do Perkins® My Engine or Cat® Spotters Guide have ads?

Neither Perkins® My Engine nor Cat® Spotters Guide shows ads.

### Which is updated more often, Perkins® My Engine or Cat® Spotters Guide?

Perkins® My Engine ships an update every 2 months, and Cat® Spotters Guide every 5 months. Most recently, Perkins® My Engine was updated on November 1, 2026 and Cat® Spotters Guide on October 29, 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.*