ShiftLock

Review by eFreeware

ShiftLock is a reference app from developer Wreckmaster Mark, built for people who move other people's cars for a living. It answers one narrow question: where is the shift interlock release on this vehicle, and how do you operate it. The reason to consider it is simple. A tow operator who cannot get a car into neutral is stuck at the curb, and this app is meant to remove that delay.

It sits in the Books & Reference category rather than anything resembling a game or a general-purpose tool, and that framing is accurate. What you get is location information and operating steps for the releases found on modern vehicles. It costs $6.99, carries no ads and offers no in-app purchases, so the whole product is what you pay for once.

At the time of writing it has more than 10,000 installs and a 4.3 average across 172 ratings. Those numbers suggest a small, specific audience rather than a mass-market one, which fits a tool aimed at a trade.

What the app actually tells you

Most modern vehicles have some form of release that lets a tow operator shift the car into neutral before it is moved. The developer describes three common shapes: a button, a lanyard, or a pull-tab. The app shows where that release is located on a given vehicle and then walks through the steps for using it.

That combination is the core of the product. Location alone is often not enough, because a release buried under a trim panel or tucked into a console is only half the job if you do not know the sequence that follows. Having the steps alongside the location is what makes the app usable at the side of a road rather than something you consult later.

The developer's framing is that this saves time. I would treat that as the reasonable pitch it is: a reference that replaces guesswork and hunting with a direct answer, provided the vehicle in front of you is covered.

Coverage across regions

The catalog is organized around three broad groups: vehicles sold worldwide, European vehicles, and vehicles from the USA, Mexico and the Caribbean. That spread matters if you work near a border, in a port city, or anywhere the mix of cars on the road is not uniform.

For a tow operator, regional coverage is the difference between a tool that helps occasionally and one that helps daily. Someone working a single suburban route may only ever need one of those groups, while an operator handling imports and tourist vehicles will care about all three. The app is built to serve the wider case.

Keeping the catalog current

Vehicles are added to the app regularly, and the developer uses free push notifications to announce new entries. For a reference like this, freshness is most of the value. Model years turn over, interiors get redesigned, and a release that lived in one place last year can move somewhere less obvious in the next.

Push notifications are a sensible delivery method here, since the point is to know when something new has been added without checking manually. The app has been updated as recently as December 4, 2025, which is a fair sign that the catalog is being maintained rather than left to age.

The app first appeared on December 18, 2015, so this is a long-running title rather than a recent experiment. A decade of updates behind a single-purpose reference tool is reassuring for anyone deciding whether to trust it with work.

What it costs and what it expects

ShiftLock is a paid download at $6.99. There are no ads and no in-app purchases, so there is nothing to unlock later and no second decision to make after buying. For a professional tool, that is an easy cost to weigh against a single job.

The trade-off the app sets for itself is its focus. It does one thing: shift interlock release locations and their operation, for the vehicles it covers. It is a reference for a working tow operator, not a general vehicle database, and it is not built to answer questions outside that lane.

The other expectation is that you keep it nearby. Because new vehicles arrive through push notifications, the app is designed to be part of a routine rather than something you open once and forget. Anyone who would rather not receive those alerts can still use the catalog.

Suited to the job it names

The app is explicit that it is for towing professionals, and that is the right way to read it. If your work involves getting unfamiliar vehicles into neutral so they can be moved, the value is direct and recurring. The cost is small next to the time a single awkward release can cost you.

It also suits operators whose territory brings them a wide mix of makes and origins, since the regional groups cover European and USA/Mexico/Caribbean vehicles as well as those sold worldwide. The broader your exposure to different cars, the more of the catalog you will actually use.

For a general driver, the same information is rarely needed. A release matters when a car will not shift out of park and has to be moved, which is a tow operator's problem far more often than an owner's. The developer has aimed this at one trade, and the app reads that way.

A practical buy for tow operators

ShiftLock is a focused, paid reference tool for tow operators, and it does not pretend to be anything else. It tells you where a vehicle's shift interlock release is and how to operate it, across worldwide, European and USA/Mexico/Caribbean vehicles, with new entries pushed to you as they are added.

At $6.99 with no ads and no in-app purchases, the decision comes down to whether locating releases is part of your working day. If it is, the app is priced like a consumable and the coverage is broad enough to justify keeping it installed. If it is not, this is a specialized catalog built for someone else's job.