Support

Calculations and formulas

If a result looks wrong, this is the section to read first — and the thing to send us.

1. Check your units. Most surprising results are a unit mismatch. Every unit is set in Settings → Units: speed, altitude, temperature, pressure, weight, arm/CG, and fuel. Switching units never changes the underlying physical value — a weight you entered as 340 lb stays the same weight when you switch to kilograms.
2. Show the formula. Turn on Settings → Show formulas, then tap the ƒ button on a result card that offers one. Supported calculator results show the exact formula the app used, written in symbols — you check your own figures against it. Results without a formula behind them, such as the timer, have no ƒ button.
3. Send us the exact inputs. If the formula looks right and the answer still does not, email us the inputs, the units you had selected, and the result you expected. Calculation reports are our highest-priority support category and we investigate every one.

The calculators compute through the E6BKit engine, which is unit-tested against verified reference vectors, and the displayed formulas are themselves tested against that engine's output. The exact engine version this build ships with is shown in Settings → About.

Purchases and restoring

Pro is a one-time purchase, not a subscription. Nothing renews and there is nothing to cancel.

Restoring on a new device, or after reinstalling

1. Sign in to the same Apple Account that made the purchase.
2. Open the app and go to Settings → Restore purchase.
3. Wait for the confirmation. Restoring needs a connection and usually takes a moment.

Restore Purchase is also on the purchase screen itself, so you never have to buy again to find it.

“Restore purchase” did not unlock Pro

• Confirm the device is signed into the Apple Account that made the purchase. A different personal account will not restore it. Whether a purchase can be shared with your family group depends on Apple's Family Sharing eligibility for this product — if you are not sure, email us before buying a second copy.
• Check your connection. Restoring needs the network for a moment, even though the app itself works offline.
• If the purchase screen says pricing is unavailable, the App Store is not reachable right now. Restore Purchase is still available on that screen; try again shortly.
• Still stuck? Email us with your Support ID and we will look at the purchase record.

Refunds

Refunds for App Store purchases are handled by Apple at reportaproblem.apple.com. We cannot issue them ourselves.

Offline use

Every calculator works with no connection at all, and METAR prefill decodes the text you paste on the device without fetching anything. The app never downloads weather.

A connection is needed for the parts that talk to somebody else: buying Pro, restoring a purchase, loading prices on the purchase screen, syncing aircraft profiles and saved loadings through iCloud, opening the privacy, terms and support links, and sending the product-usage analytics described in the Privacy Policy. If you are offline, iCloud changes sync when the device reconnects.

iCloud sync

Aircraft profiles and saved loadings sync through your own private iCloud. They are stored in your Apple account — they never pass through our servers, and we cannot read them.

If your aircraft are not appearing on a second device

1. Check both devices are signed into the same Apple Account, in Settings → [your name].
2. Check iCloud Drive is on, and that E6B Pilot Computer is allowed to use iCloud: open Settings → [your name] → iCloud, then look through the list of apps using iCloud (you may need to tap See All) and make sure E6B Pilot Computer is enabled.
3. Make sure both devices have a working connection, and open the app on each. Sync happens in the background and is not instant — give it a minute or two with the app open.
4. If a device has been offline, edits you made on it sync when it reconnects.

If you are signed out of iCloud, the app still works — your profiles and loadings are simply kept on that device only, and will sync if you sign in later.

Your data

Exporting your saved data

Settings → Export Aircraft & Loadings writes every saved aircraft profile and every saved loading to a single JSON file and hands it to the share sheet — save it to Files, mail it to yourself, or put it anywhere you like. It is readable text, not an opaque backup, and it is not behind the Pro purchase. That is the file's scope: calculator entries you have not saved, and your unit preferences, are not included.

A single saved loading can also be exported as a PDF report from the loading itself, if you want one flight's figures rather than everything.

Deleting things

You can delete aircraft and saved loadings at any time from Settings → Manage Aircraft and Settings → Manage Loading History — with or without Pro. Deleting the app removes its local data; its iCloud data is removed through iOS Settings.

Why saved loadings cannot be edited

A saved loading freezes the aircraft figures and results exactly as they stood at the moment you saved it. If you edit an aircraft profile afterwards, existing saved loadings keep the old figures on purpose — a record you relied on should not change underneath you. To get a record against the new figures, calculate and save a new one.

Privacy

What we receive, what we never collect, and how to ask us to delete your records is set out in the Privacy Policy.

Safety

The bundled “Cessna 172 (Sample)” profile is sample training data, not Pilot's Operating Handbook data. Build a profile from your own aircraft's current documents before relying on any result.