Windmill Propane vs Signal Sleuth
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.
Signal Sleuth
Locate nearby Bluetooth Low Energy devices and identify your own. The app offers a free passive scanning mode and a VIP finder mode for focused targeting with signal guidance. Unlock advanced features like manual probing and custom rules with a subscription.
- Passive BLE scanning
- Targeted finder mode
- Warming/cooling signal guidance
- Manual probing
- Custom rule imports
- VIP subscription for advanced features
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Scan nearby Bluetooth Low Energy devices, sort out what is yours, and focus on a single target with honest warmer-or-colder signal guidance. Signal Sleuth keeps passive BLE scanning free, then unlocks finder mode, manual probing, and custom rule imports with VIP. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Windmill Propane at none against Signal Sleuth's 3. Windmill Propane also leads on device support (3 vs 1) and iOS requirement (12.2 vs 18.0). Signal Sleuth's advantage is update cadence (daily vs every 23 months). On price 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
Both are free to download. Signal Sleuth sells 3 in-app purchases, starting at $1.99 per 7 days. Windmill Propane asks for nothing beyond the download.
Windmill Propane ships an update every 23 months, Signal Sleuth daily. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.
| Parameter | Windmill Propane | Signal Sleuth |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 23 months | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.2 — better | 18.0 |
| Further details — not scored | ||
| Size | 46 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | EDPO, LLC | LUKE WILLIAM ROACH |
In-app purchases
Windmill Propane
No in-app purchases
Signal Sleuth
- VIP Weekly$1.997 Days
- VIP Monthly7 Days trial$5.991 Month
- VIP Yearly14 Days trial$39.991 Year
Questions
Is Windmill Propane free?
Is Signal Sleuth free?
Do Windmill Propane or Signal Sleuth have ads?
Which is updated more often, Windmill Propane or Signal Sleuth?
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