Get in touch
Email hello@karker.ai. Tell us what you were trying to do, what happened, and (if relevant) the booking reference. Screenshots help.
Privacy or data-deletion requests: privacy@karker.ai.
Frequently asked questions
How does Karker make money?
We earn a small commission from airlines on confirmed bookings, and (where shown) a flat service fee added on top of the fare. The service fee is always disclosed on the confirmation screen before you pay — no hidden costs at checkout.
I need to cancel or change a booking. What do I do?
Email hello@karker.aiwith your booking reference and what you want to do. Karker forwards the request to the airline; refunds and changes follow the airline's fare rules. If you booked a non-refundable fare, the airline typically does not return the fare amount, but taxes are sometimes recoverable.
The airline cancelled my flight. Who handles that?
The airline owns the resolution — rebooking, refund, or compensation under applicable consumer law (for flights from or to the EU/UK, see Regulation 261/2004). We will help you contact them and, where useful, file the request with you. Forward any airline notice to hello@karker.ai.
Where is my boarding pass?
The pass is delivered to Apple Wallet automatically when the booking is confirmed and appears in the Karker app under Wallet. If it is not there, the airline may not have issued the e-ticket yet — large airlines sometimes take a few minutes. If it is still missing after an hour, email us with the booking reference.
Is my data safe?
Yes. We encrypt sensitive fields (passport numbers, payment tokens) at rest, use TLS for every connection, and never store raw card numbers (Stripe handles that). The full breakdown is on the Privacy page.
How do I delete my account?
In the app: Settings > Account > Delete account. The account and all associated data are removed within 30 days, except for booking records we are legally required to retain for tax and consumer-protection purposes (typically 7 years from the trip date).
You can also request deletion by emailing privacy@karker.ai.
How do I export my data?
Settings > Account > Export data. We send a JSON archive of your account, saved travelers, payment-method metadata (no card numbers), and booking history to your email.
Do you support multi-city bookings?
One-way and round-trip are supported in 1.0. Multi-city is on the roadmap and shipping shortly after public launch.
Why did Karker show a different price than the airline website?
We show the total trip price— base fare plus the bags, seat, and taxes you would actually pay. Airlines often advertise the headline fare and add the rest at checkout. If our total is higher than the airline's headline, we are showing what the trip costs to book; if our total is materially higher than the airline's checkout total for the same fare and add-ons, that's a bug — please email us with both totals and we will investigate.
I got an "Invalid code" error during sign-in.
Sign-in codes expire after 10 minutes and are single-use. If yours expired, request a new one. If new codes still fail, the email may be hitting spam — check the Junk folder, or use Sign in with Apple/Google instead.
Karker is not finding my home airport.
Karker uses your phone's coarse location (with permission) to suggest the nearest airport. If permission is off, Settings > Privacy > Location Services > Karker on your iPhone enables it. You can always type the airport manually — every IATA code and city name is searchable.
Response times
We aim to reply within 24 hours, Monday to Friday. Booking-critical issues (flight today or tomorrow) are prioritized — flag them in the email subject as URGENT — flight today and we will see them faster.
Reporting a bug or a security issue
Bugs: hello@karker.aiwith the iPhone model, iOS version, app version (Settings > About), and reproduction steps.
Security issues: security@karker.ai. Please give us a reasonable window to investigate before disclosure. We do not currently run a paid bug-bounty program but always credit responsible reports.