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42nd Design

Terms of Service for Skewt

Last updated: 7 August 2026

Skewt is published by 42ndDesign (“we”, “us”). These terms are the agreement between you and us for the Skewt app and the service behind it. By installing or using Skewt you accept them. If you do not accept them, do not use the app.

What Skewt is — and what it is not

Skewt draws Skew-T Log-P soundings: forecast profiles from a numerical weather model, and observed profiles from weather-balloon launches, along with derived values such as CAPE, CIN, and a parcel path.

Skewt is not a certified aviation weather product and must not be used as a sole source for flight planning or any other decision where being wrong is dangerous. It is not approved by any civil aviation authority. Forecast data is model output, which is routinely wrong; observed soundings are taken at fixed sites, typically twice a day, and may be hours old and many tens of kilometres from where you are looking. Derived values are computed from that data and inherit every error in it. Use official aviation weather sources and your own judgement for anything operational.

The free trial

A fresh install gets a 14-day free trial of the full app. Three things about it are worth stating plainly, because they differ from how store-run trials work:

  • The trial is counted on your device, not by Google and not by us. It is not attached to your Google account, and no payment method is required to start it.
  • Because it lives in the app’s own storage, clearing the app’s data or reinstalling the app without restoring a device backup starts a new trial. We do not treat that as a breach of these terms, but we also do not guarantee it will keep working that way in future versions.
  • The reverse is also true, and it is why the first sentence says fresh install. If your device backup is restored — reinstalling with backup on, or setting up a new device from your old one — the app finds your existing trial record and carries on from it. You get whatever time was left, and if the 14 days were already used up you go straight to the subscription screen rather than getting a second trial.

When the trial ends, the app’s soundings are behind the subscription. Anything already stored on your device stays on your device.

Subscription, billing, and cancellation

Skewt is sold as an annual auto-renewing subscription through Google Play. The current price and billing period are shown on the app’s purchase screen and in Google Play before you confirm, and they govern — not any figure quoted elsewhere.

Google Play handles the payment. It processes the transaction, holds the billing relationship with you, and applies its own terms to it — and depending on the country you buy from, Google is either the seller of record or acts as our agent or payment provider, with us as the seller. Either way we never receive or store your payment details.

  • Renewal. The subscription renews automatically at the end of each period, charged to your Google Play payment method, until you cancel.
  • Cancellation. Cancel at any time in Google Play (Subscriptions), or via Manage subscription on the app’s purchase screen, which opens the same place. Cancelling stops the next renewal; access continues to the end of the period you have already paid for.
  • Refunds. Google Play’s refund policy applies to every purchase, and Google Play is the fastest route for a refund request. We can also issue a refund on a Play order ourselves, so if Play has turned you down or the request does not fit its self-service window, write to us at the address at the end of these terms and we will look at it.
  • Price changes. If the price changes, Google Play’s price-change process applies: you are notified in advance, and depending on the change and where you live that process either asks you to accept the new price or charges it unless you cancel first. Either way you can cancel before it takes effect.
  • Restoring a purchase. Restore purchases on the app’s purchase screen re-checks your entitlement with Google Play. Your subscription follows your Google account, so it works on a new device signed in to the same account.

Nothing here limits any statutory right you have that cannot be limited by agreement, including consumer cancellation and refund rights under the law where you live.

Using Skewt reasonably

The app talks to our server, which fetches data from upstream weather services on your behalf. Those services are shared, mostly free, and we are a guest on them. So: do not automate or script the app or its backend, do not attempt to bypass rate limits or the subscription check, do not resell or redistribute the data the app fetches as a bulk feed, and do not attempt to break, overload, or reverse engineer the service. We may rate-limit or block traffic that threatens the service or our access to an upstream.

Data and third-party sources

Skewt’s weather data comes from third parties — currently Open-Meteo for forecast soundings and place-name lookup, the Iowa Environmental Mesonet for observed soundings, and Mapbox for the map. We do not own that data, we do not guarantee it, and a source can change, degrade, or withdraw access without notice.

What the app sends, what we keep, and who else sees it is set out in our privacy policy: https://42nddesign.com/skewt/privacy.

The app itself, its design, and its name remain ours. You get a personal, non-exclusive, non-transferable licence to use it while these terms hold.

Availability and changes

We do not promise the service will be available without interruption. We may change, suspend, or discontinue features — including whole data sources — and we may stop offering the app. If we discontinue the service outright while you hold a paid subscription, we will say so in the app or the store listing. For anything already paid, Google Play’s refund policy applies and you can also write to us.

No warranty

Skewt is provided as is and as available, without warranty of any kind, express or implied, including any implied warranty of merchantability, fitness for a particular purpose, accuracy, or non-infringement. We do not warrant that the data is accurate, current, or complete. Some jurisdictions do not allow these exclusions, and where that is so, this section applies only as far as the law allows.

Limitation of liability

To the fullest extent the law allows, we are not liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss arising from a decision you made using Skewt’s data. Our total liability to you for any claim relating to Skewt is limited to the amount paid for your Skewt subscription in the twelve months before the claim, whoever received that payment. Nothing here excludes liability that cannot lawfully be excluded — including for death or personal injury caused by negligence, or for fraud.

Ending these terms

You can end them at any time by cancelling your subscription and deleting the app. We may suspend or end your access if you materially breach these terms — in practice, that means the “using Skewt reasonably” section above.

Changes to these terms

We may revise these terms. When we do, the revised version is published at https://42nddesign.com/skewt/terms and the date at the top changes with it, and material changes are noted in the app’s release notes as well. The revised terms apply from the date they are published; they do not apply retrospectively to anything that happened before it.

Continuing to use Skewt after a revision means you accept it. If you do not accept it, stop using the app — and cancel your subscription in Google Play if you hold one, which stops the next renewal and leaves your current paid period running. Nothing in this section lets us reprice you by amendment: a price change is not a change to these terms. It goes through Google Play’s price-change process described above, which notifies you in advance and lets you cancel before the new price takes effect.

Governing law

These terms are governed by the laws of the State of Washington, USA, without regard to its conflict-of-laws rules. The state and federal courts located in Washington have exclusive jurisdiction over any dispute, except where the law where you live gives you the right to bring a claim in your local courts — which these terms do not take away.

If part of these terms does not hold

If any part of these terms is found unenforceable, that part is applied as far as it lawfully can be, or removed if it cannot, and the rest of the terms stay in effect.

Contact

Questions about these terms: support@42nddesign.com
42nd Design — publisher of Skewt.