LuckGrib alternative
LuckGrib is cheaper than we are.
Here’s when it’s also better.
Most comparison pages are written by the winner. This one isn’t, at least not on the axis most people check first. LuckGrib costs $89.98 once and never asks again; we cost $59 a year. If cost is your deciding factor, the answer is on this page and it isn’t us. What follows is the rest of the picture.
The short answer
LuckGrib or OpenSail — which should a cruiser buy?
Buy LuckGrib if you live in an Apple household, you read GRIB fields comfortably, and you would rather own software than rent it. $29.99 for the app plus $59.99 for the routing purchase is $89.98 once, and from about month nineteen it’s cheaper than an OpenSail subscription. Its GRIB engine and its satellite download catalogue over Iridium GO and RedPort are the best on this comparison.
Buy OpenSail if the crew isn’t all on Apple, or if you want the tool to do more of the thinking. It gates every route segment on GEBCO bathymetry against your draft, treats comfort as a routing objective rather than time alone, tells you why it refused a route when it can’t find one, scores your anchorage hour by hour, and emails you when a new model run makes a planned passage materially worse.
The split isn’t really price. It’s whether you want a very good instrument or a platform that argues with you. LuckGrib is the former and is unashamed about it. Plenty of good sailors carry both.
- One-time vs annual
- LuckGrib $89.98 once · OpenSail $59/yr
- Cost crossover
- LuckGrib ahead from ~month 19
- Platforms
- LuckGrib macOS + iOS · OpenSail any browser
- Depth gate on routes
- OpenSail per-segment · LuckGrib not a chart tool
Pick OpenSail if
Your crew is on mixed devices, or you want depth enforced, comfort weighed, refusals explained and the anchorage checked without doing it yourself.
Pick LuckGrib if
You’re Apple-only, you enjoy reading the raw fields, and you would rather pay once for a sharp instrument than subscribe to a platform.
Competitor prices and features read from the vendors’ own pages on . Every source is linked at the foot of this page.
The money
The argument we lose
Let us do the arithmetic properly rather than burying it.
LuckGrib is $29.99 for the app and $59.99 for the weather routing in-app purchase. Both one-time. Add the $59.99 Offshore Data purchase if you want the full satellite download catalogue and you’re at $149.97, once, forever. There’s no renewal, no tier ladder and no price increase letter in three years.
OpenSail Voyager is $59 a year. Cross over at nineteen months on the routing bundle, or about two and a half years with Offshore Data included. Past that, LuckGrib is simply cheaper and the gap widens every year you keep sailing.
- Windy Premium + plugin$21Routing via a community plugin, no chart data underneath
- OpenSail Voyager$59Unlimited routing, four comfort modes, departure planner
- LuckGrib + routing$90$29.99 app plus a $59.99 routing purchase, bought once
- savvy navvy Explore$121£95/yr — offline charts and the departure scheduler
- PredictWind Standard$249The first PredictWind tier listing weather routing
- PredictWind Professional$499Boat motion, high-res GRIBs, ocean currents, AI polars
Cheapest tier of each product whose own feature list includes weather routing, at list price, billed annually. savvy navvy converted from £95 at 1.27; they set US pricing separately. Windy’s figure buys Premium, not routing — the routing is a community plugin.
The subscription buys things a one-time purchase structurally can’t: new forecast models ingested and served as they become available, server-side re-scoring of your planned routes when a new model run lands, hosted route sharing, and an API with rate limits somebody has to pay for. Whether that’s worth $59 a year to you is a real question with a real answer, and for some sailors the answer is no.
We would rather write that sentence than pretend a subscription is a bargain against software you buy once.
The constraint
Apple-only is a decision the whole crew lives with
LuckGrib runs on macOS and iOS, and the two are separate purchases. For a solo sailor with a MacBook and an iPad that’s a non-issue and arguably a virtue, because a focused native app on one platform is how you get software this fast.
It stops being a non-issue in three fairly common situations.
- Mixed crew. The person standing the 0200 watch has an Android phone and can’t open the plan.
- Shore support. Somebody at home wants to follow the passage on a Windows laptop and see what you’re seeing.
- Borrowed machine. Marina office, delivery boat, chartered yacht: you want the plan on whatever screen is in front of you without installing anything.
OpenSail runs in any modern browser, installs to a home screen on both platforms, and keeps the last real forecast cached with a banner that says how old it is. That isn’t better engineering than LuckGrib. It’s a different bet about where sailing software should live.
The difference
A tool that reads weather, and a tool that argues
LuckGrib gives you the fields with extraordinary fidelity and expects you to be the router. That’s a legitimate and respectable design, and it’s exactly what an experienced offshore navigator wants at 0400.
OpenSail assumes you would like some of that work done and the reasoning shown. The clearest example is what happens when there’s no route at all.
The solver expanded 318,004 candidate states and rejected every one that reached Great Harbour. Here’s what stopped them.
- Depth under keel below draft + safety margin61%
- Segment crosses charted land22%
- Gust above the vessel’s configured ceiling14%
- Other3%
Densest rejection cluster near 26.6°N, 78.9°W — the bank north of the cut. Try a draft under 1.5 m, a later departure, or the northern approach.
No other product on this page documents anything like this. A refusal you can act on is worth more than a route you can’t interrogate. Worked example: the panel is the real product surface, the numbers illustrate a typical shallow-bank refusal.
The other three, briefly. Comfort as an objective: the same passage solved four times with different weightings, so family mode can trade 2.6 hours for half the heel and tell you the price. Depth as a hard constraint: every returned segment checked against GEBCO 15-arc-second bathymetry and your draft, which is a chart-side job LuckGrib doesn’t set out to do. Vigilance: once a route is planned, a new model run gets re-scored against it server-side and you hear from us only if the outlook materially worsens.
Line by line
OpenSail vs LuckGrib, capability by capability
| Capability | OpenSail | LuckGrib |
|---|---|---|
| Weather routing included at the entry paid tierWhether you can get an optimised route without buying the top of the price list. | ●$59/yr, unlimited | ＄$59.99 add-on |
| Free tier that solves a real routeWhether you can test the actual solver before paying, rather than only viewing forecasts. | ●1 route/week | ◐14-day trial |
| Per-segment depth verification against bathymetryWhether every leg of the returned route is checked against charted depth and your draft, rather than the grid being sampled at waypoints. | ●GEBCO 15″, per segment | —Not a chart tool |
| Comfort as a first-class routing objectiveWhether you can ask for the passage your crew will tolerate instead of only the fastest one. | ●4 modes incl. Family | —Time-optimised |
| Editable polars for your own boatWhether the route assumes your boat’s performance or a stand-in from a small library. | ●Editable + catalogue | ●Full polar import |
| Model disagreement measured along your routeWhether the app tells you where two independent models stop agreeing on your track, or leaves you to flip between tabs. | ●Verdict + band | ◐Manual comparison |
| Says why it refused a routeWhether a failed solve explains the constraint that stopped it or returns nothing. | ●Structured refusals | —not offered |
| Plain-language briefing on which route and when to leaveWhether the app commits to a recommendation and shows its reasoning, or hands you a table. | ●Intelligence Layer | —Charts + tables |
| Anchorage exposure scored hour by hourWhether you can check tonight’s anchorage for the sectors it is open to, in the same app that planned the passage. | ●In the map | —not offered |
| Alerts you when a new model run worsens a planned routeWhether you stop re-checking the forecast manually once a passage is planned. | ●Threshold-gated | —not offered |
| Runs in a browser with no installWhether crew, delivery skippers and shore support can open your plan on whatever machine is in front of them. | ●PWA, installs optional | —Apple only |
| Documented public APIWhether you can pull routes into your own dashboard, race committee tooling or boat systems. | ●REST, keyed | —not offered |
| Pause the subscription for haul-outWhether you pay for the months your boat is on the hard. | ●Built in | ●No subscription |
● included◐ partial or workaround＄ costs extra— not offered
The other side
Where LuckGrib wins
Where LuckGrib is the better buy
Written by us, about them. If one of these describes your boat, buy theirs — you will be happier and we would rather you came back later than churned in a month.
- It isn’t a subscription, and after roughly three years the full offshore kit is cheaper than anything else here. If you sail for a decade, LuckGrib wins on price and it isn’t close.
- The GRIB engine is the fastest and most parameter-complete on this page. If you want every field GFS publishes, you want this.
- Satellite downloads through Iridium GO and RedPort are mature, well-documented and heavily used by people who depend on them.
- One author who sails, answers his own email, and has never held a feature hostage behind a tier.
One more, which isn’t a feature. LuckGrib is made by one person who sails, answers his own email, and has never held a capability hostage behind a higher tier. In a category with $499 subscriptions and split-out companion apps, that’s worth something, and it is part of why the offshore community defends it so fiercely.
Questions sailors actually ask
Is LuckGrib cheaper than OpenSail?
Over any real ownership period, yes. LuckGrib is $29.99 for the app plus $59.99 for the weather routing purchase, bought once, so $89.98 total and then nothing. OpenSail Voyager is $59 a year. You’re ahead with LuckGrib from month nineteen, and by year five it’s $90 against $295. Add LuckGrib’s $59.99 Offshore Data purchase and the crossover moves to about two and a half years. There’s no version of this arithmetic where a subscription wins on cost alone.
Does LuckGrib run on Android or in a browser?
No. It’s macOS and iOS only, and the Mac and iOS versions are separate purchases. That’s a real constraint on a boat with mixed devices, or when your shore support wants to look at the plan, or when the crew who is actually doing the 0200 watch has a Pixel. OpenSail runs in any modern browser and installs to a home screen on both platforms.
Which is better for offshore passages?
For pulling weather down a satellite link and reading it deeply, LuckGrib. Its download catalogue over Iridium GO and RedPort Optimizer is mature, well documented, and trusted by people whose lives depend on it working. Its GRIB engine carries more parameters than anything else on this page.
For deciding what to do with that weather, OpenSail: four comfort modes, depth enforced against your draft on every segment, model disagreement measured along your track, and a briefing that commits to one route. A fair number of offshore sailors carry both, and that is a sensible answer rather than a diplomatic one.
What does OpenSail do that LuckGrib doesn’t?
Mainly, things that aren’t weather. Depth gating against GEBCO bathymetry and your draft on every route segment. Comfort as a routing objective rather than time alone. A structured explanation when no route exists. Hour-by-hour anchorage exposure scoring. Forecast-drift alerts on a planned route. Route sharing and a documented REST API. LuckGrib is a weather tool that routes; OpenSail is a routing platform that reads weather. Neither framing is an insult.
Should I buy LuckGrib instead of subscribing to OpenSail?
If you sail an Apple household, you’re comfortable reading raw GRIB fields, you do most of your thinking yourself and you would rather own software than rent it, then yes. Buy LuckGrib. It’s excellent, it’s honest software, and $89.98 once is a very good deal. Come back if you find yourself wanting the boat model, the comfort trade-off or the anchorage check, and if you never do, we’re glad you found the right tool.
Where these numbers come from
LuckGrib prices are one-time in-app purchases read from the developer’s own purchase page. Last checked . Prices change; if you find one of these out of date, tell us and we will fix it.
- LuckGrib — PurchaseOne-time prices for the app, Offshore Data and Weather Routing, and the no-subscription policy.
- LuckGrib — product siteSupported platforms and satellite download paths.
PredictWind, savvy navvy, Windy.com and LuckGrib are trademarks of their respective owners. OpenSail is not affiliated with, endorsed by, or sponsored by any of them. Comparisons describe publicly documented capability at the date above.
Compare something else
Try the free tier before you spend anything
One real solved route a week, no card. If you finish the week thinking you would rather own LuckGrib, buy LuckGrib — that’s a good outcome and we mean it.
Plan a passage — freeFree account, no card. If it doesn’t beat what you use now, close the tab. We won’t email you about it.