Mudflap

Review by eFreeware

Mudflap is a free Android app from the developer of the same name, filed under Maps & Navigation. Its pitch is narrow and clear: instant discounts on diesel at more than 3,600 truck stops in the United States, plus a truck-safe navigation layer for getting there. The discount side is the reason to consider it; the routing is there so the fuel stop is not the only thing the app is good for.

What separates this from a generic fuel-price app is the way the savings are delivered. According to the developer, you choose a participating stop, connect a debit or credit card, and receive a fuel savings code in the app. There is no credit check and no waiting period before you can use it, which matters if you have ever been put off by fuel-card applications that take days to approve.

The app has been around since late 2019 and sits at a 4.5 average from 4,686 ratings, with over a million installs. That is a healthy signal for a utility that lives or dies on whether the discount actually shows up at the pump. I would treat the rating as a starting point rather than proof, since fuel pricing varies by region and by stop.

The discount network is the core of the app

The list of participating chains is broad enough to cover most long-haul corridors. TA Petro, Speedway, Kwik Trip, Sapp Bros, Casey's, Maverik, Circle K, AMBEST and Road Ranger all appear in the developer's lineup, alongside other stops. For a driver running a regular route, that spread means the app is not tied to one region or one chain.

The mechanic is simple: the discount is delivered through a code rather than through a separate billing account. The developer describes the savings as instant, and the setup steps support that: pick a stop, link a card, get a code.

Where this gets interesting is frequency. A discount of a few cents per gallon is trivial on one fill-up and meaningful over a month of driving. The app is built for people who fuel often enough for that math to work in their favor, which is a narrower group than the install count suggests.

Truck-safe routing for the rest of the trip

The navigation side is included at no cost and is built around the constraints that matter to trucks rather than cars. The developer says routes avoid low bridges, weight limits and restricted roads, which are exactly the things a standard consumer navigation app will happily send you into.

You can navigate to any destination, or route directly to your next fill-up. That second option is the more interesting one, because it connects the two halves of the app: the fuel decision and the driving decision become one step instead of two.

I would not expect this to replace a dedicated commercial routing subscription for someone who needs detailed hours-of-service planning or hazmat handling. What it does offer is a free layer that covers the most common physical hazards, and for many drivers that is enough to keep it installed alongside whatever else they run.

What getting started actually requires

The developer's setup path has three steps. You download the app, choose a Mudflap truck stop when you want a discount, and connect a debit or credit card to receive a fuel savings code. There is no separate application to submit and no credit check.

That is a low-friction onboarding compared with traditional fuel card programs, which often involve underwriting and a delay before the card is usable.

Support is available around the clock by phone at 888-885-3835 or by email at [email protected], which is worth noting for anyone who runs into an issue at a stop outside normal business hours. The app is free, carries no ads and has no in-app purchases, so there is no paid tier to weigh against the free one.

Who gets the most out of it

The clearest fit is the owner-operator or small fleet driver who buys diesel regularly and wants a discount without signing up for a fuel card program. The combination of a wide stop network and a code-based checkout is designed for that pattern of work.

It also suits drivers who want a free navigation layer that respects truck restrictions. If you are running a box truck, a heavy pickup or a vehicle with height and weight limits, the routing side addresses a real problem that general-purpose maps ignore.

The app is less obviously useful for someone who fills up once a month in a single metro area, where the discount opportunity is thin and the routing constraints rarely apply. That is not a flaw in the app so much as a mismatch with how it is built.

A free tool worth keeping for regular diesel runs

Mudflap does two jobs and does them without charging for either. The diesel discounts at more than 3,600 stops are the headline, and the free truck-safe navigation is a genuine second feature rather than a throwaway add-on. The absence of ads and in-app purchases keeps the experience clean.

The app is best suited to drivers who fuel often enough for per-gallon savings to add up, and who drive vehicles affected by the restrictions the routing avoids. If that describes your work, the setup is short and the cost is nothing, which makes it easy to try on your next run.

For occasional diesel buyers in a single city, the value is thinner, though the navigation half still stands on its own. On balance, this is a practical free utility for the audience it was built for, and the 4.5 average from a large base of ratings suggests that audience has found it useful.

What's new in version 3.39

- Bug fixes and improvements