Windmill Propane vs DAWN Inspector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Windmill Propane
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Over 25 years ago, we started with a simple idea: world-class safety & service for every customer, every time. Our founders desired to build a business that would glorify God, serve the needs of it’s customers and add value to the community. We now have three successful brands that deliver millions of gallons of propane to thousands of customers across California. We are proud of the strong and lasting relationships we have built with our customers and the communities we serve. Our service area ranges from Sacramento to the Grapevine. Every store we operate is supported by an incredible employee family. We would not be the brand we are today without the constant investment of their intellect, energy and time. They truly are some of the best in the business. We look forward to a bright future as we continue to grow, serving more families, businesses and communities across the great State of California.
DAWN Inspector
This app connects to your vehicle's network to perform emissions tests. It guides you through a quick, two-minute process to ensure your car meets CARB standards.
- CARB-approved emissions testing
- Vehicle network connection
- Quick 2-minute test completion
- Engine on test initiation
- Hardware attachment required
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DAWN OBD Inspector™ CARB-approved version Attach the hardware to the vehicle network connector, turn on the engine, and open the app. Complete the test within 2 minutes.
Screenshots
Verdict
The clearest difference is update cadence: DAWN Inspector at every 2 months against Windmill Propane's every 23 months. Windmill Propane's advantage is iOS requirement (12.2 vs 15.0). On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Windmill Propane ships an update every 23 months, DAWN Inspector every 2 months. Both last shipped on November 3, 2026.
| Parameter | Windmill Propane | DAWN Inspector |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (2 ratings) — better |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 23 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.2 — better | 15.0 |
| Further details — not scored | ||
| Size | 46 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | EDPO, LLC | HEM Data Corporation |
In-app purchases
Windmill Propane
No in-app purchases
DAWN Inspector
No in-app purchases
Questions
Is Windmill Propane free?
Is DAWN Inspector free?
Do Windmill Propane or DAWN Inspector have ads?
Which is updated more often, Windmill Propane or DAWN Inspector?
Other comparisons
