onX Fish: GPS Fishing Maps

Review by eFreeware

onX Fish is a GPS mapping and lake-finding app from onXmaps, aimed at open water anglers rather than ice fishermen. The premise is straightforward: instead of piecing together a paper map, a state fisheries report and a weather app, you get lake data, satellite imagery and forecasts in one place. That alone is a reasonable argument for trying it.

The coverage is deliberately regional. The app is built around Minnesota, Wisconsin, Michigan, North Dakota, Indiana, Ohio, Illinois, South Dakota, Iowa, Missouri and Montana, so if you fish those states it speaks your language. The developer reports over 100,000 installs and a 4.8 average rating, which suggests the audience it targets has taken to it.

What makes it interesting to me is the data layer underneath the map. Rather than just showing you where water is, the app tries to tell you what is in that water and whether it is worth the drive.

Finding a lake worth the drive

The Lake Finder is the core of the free experience. You can filter lakes by species, and the premium filters let you narrow things down by high abundance, trophy potential, keeper potential or stocking effort. That is a much more useful way to plan a trip than scrolling through a list of every body of water in the state.

Once you have a candidate, the app shows species survey data and fish size distribution for that lake. In practice that means you can see whether a lake holds the size class you are after before you commit a Saturday to it. It is the kind of information that usually lives in a state agency PDF that nobody reads.

Stocking records and catch-per-unit-effort comparisons are part of the offering too. Neither of those will tell you exactly where the fish are on a given morning, but they do give you a sense of how a lake has performed over time, which is a fair starting point for a trip plan.

Maps, structure and weather in one view

The mapping side is where the app earns its GPS label. You get satellite imagery, 3D lake maps and Fishing Area insights covering structures, lake bottoms and cover. Maximum depth and public access details are listed per body of water, so you can judge whether your boat and your trailer will be happy there.

The same screen also shows hourly forecasts, barometric pressure and moon phases. Anglers who plan around fronts and moon phases will recognize the value of having those next to the lake data instead of in a separate app. I would expect this to be one of the features people check most often the night before a trip.

Boat ramps are marked, and you can save Waypoints for the access points you use regularly. The app also handles land ownership, showing private property boundaries so you know where you can legally fish. State-specific and special regulations are included per lake, which matters when a lake has rules that differ from the statewide norm.

There are also map layers for motorized and snowmobile lake access, which is a small but telling detail for anyone who fishes through the winter months on waters the app covers.

Navigation on the water and off the grid

GPS navigation works both on and off the water, and the app can connect to Android Auto for hands-free routing to Waypoints and public access sites. That is a sensible pairing: the fiddly part of a fishing trip is often the drive and the launch, not the fishing itself.

Offline map downloads are the feature I would lean on most. You can pull down the maps you need and still reach your access points when there is no cell coverage, which is common enough on the water. The 3D maps are meant to help you picture the lake bottom and underwater structures before you ever see them on a sonar screen.

None of this replaces local knowledge or time on the water, and I would not expect it to. What it does is remove some of the guesswork from choosing where to go and how to get there.

What you get free and what the subscription adds

The app is free to download and there is no advertising. A free tier covers the Lake Finder plus navigation, downloadable maps, layers and aerial views, so the basics can be checked at no cost.

The Midwest plan costs $34.99 a year and opens up all twelve states, with species profiles, where each fish is found, catch insights, stocking records, detailed lake maps, fishing areas, private land boundaries and newer satellite views. There is also a seven-day free trial when you install the app.

That is a single regional tier rather than a menu of options, which keeps things simple but means the subscription is only worth it if you fish within the covered states. Anglers outside that footprint will find the free tier is about as far as the app can take them.

Setting up and what to expect on day one

Because the value sits in the fisheries data and the detailed maps, the trial is best used on familiar water. If the app's numbers line up with your own experience of a lake, the subscription is easy to justify. If they do not, you have lost nothing but a week.

Who this suits best

This is a planner's app. If you enjoy studying a lake before you fish it, comparing stocking records, checking the barometer and marking a few waypoints the night before, onX Fish is built around exactly that routine. It rewards preparation rather than replacing it.

It also suits anglers who fish a rotating set of lakes across state lines, where regulations, access rules and ownership boundaries change from one launch to the next. Having that information in one map view saves a lot of cross-checking.

Anglers who mostly fish one local lake from memory will get less from it, and anyone fishing outside the twelve covered states is looking at a free tool with a regional subscription they cannot use. The app is honest about its scope; the question is whether your fishing matches it.

A planning tool for Midwest open water

onX Fish does one job well: it puts lake data, mapping, weather and regulations in a single place for anglers in the Midwest and Montana. The combination of species filters, survey data and offline maps is genuinely useful for trip planning, and the free tier is generous enough to see whether the data matches your waters.

The $34.99 annual subscription is the sticking point, not because it is unreasonable for what it covers but because it is tied to a fixed set of states. If you fish those states regularly, the math is easy. If you do not, the free version is where the story ends.

For an angler who plans trips in advance and wants fewer surprises at the ramp, this is a well-targeted tool with a clear audience. Install it, use the trial on lakes you know, and let the data make the case.