How can we help?

ktak is on the App Store in many countries. During setup, choose where your business is based. ktak has presets for 136 countries that set your currency, tax name, rates, tax ID label and paper size. If your country isn't listed, choose "Somewhere else" and set them yourself. You can change any of this later in Profile.

Yes. Your business has a default currency, and you can change the currency on any single invoice. Amounts are exact to the currency's smallest unit. ktak never converts between currencies, so Home shows a separate total for each currency you're owed in.

If you're registered for tax, choose a rate for each line, or mark a line zero-rated or exempt. You can rename the tax and add, change or remove rates in Profile → Currency and tax. Rates you change or remove stay as they were on invoices you've already issued.

ktak adds up the tax you choose. It doesn't decide which treatment applies to your work, file tax returns, or support schemes such as reverse charge or withholding.

Some countries require businesses to issue or report invoices through a government system or network, such as Peppol, KSeF, SDI or e-Factura. When you choose one of these countries, ktak shows a note during setup. ktak makes PDF invoices and doesn't submit them to these systems. Check with your accountant whether a PDF is enough for you.

Yes. The app is in English, and each client's PDFs can be in English, German, French, Spanish, Italian, Dutch, Portuguese, Japanese, Chinese (Simplified), Russian or Armenian. Set a default in Profile → Documents, and a language for each client in Clients.

• Draft: not issued yet. Edit it freely.
• Ready to send: issued, with its PDF, but not marked as sent.
• Sent: you've sent it. Due soon and Overdue are worked out from the due date.
• Paid: marked as paid, with the date the money arrived.
• Credited: cancelled by a full credit note.

Marking an invoice sent or paid only records the date. It never changes the PDF.

Issued invoices can't be edited, so your records stay valid for tax. Open the invoice and choose Send a corrected invoice or Cancel this invoice. Either way, ktak issues a full credit note linked to the original. A correction then continues to a replacement draft. The replacement gets a new number when you issue it. Drafts can be edited freely.

Yes, in Profile → Invoice numbering. Choose a prefix of up to 16 letters, numbers and hyphens, and the next number. You can skip ahead, but you can't reuse a number. Credit notes have their own "CN-" series.

Turn them on in Profile → Reminders. ktak sends you a notification on your phone the morning after an invoice becomes overdue. Reminders go only to you, never to your client. If you don't get them, check that notifications for ktak are allowed in Settings → Notifications on your iPhone.

Yes. Go to Profile → Documents and turn off Show "made with ktak". Invoices you've already issued keep the PDF they were issued with.

Setting up your business, adding clients, making drafts and previewing PDFs are free. A subscription lets you issue and share as many invoices as you need. Choose monthly or yearly. The App Store shows the price for your country, and any free trial or introductory offer you're eligible for, before you confirm.

Everything you've issued stays in ktak to share and track, and you can still mark invoices sent or paid and issue credit notes. Issuing new invoices is paused until you subscribe again. Your drafts are kept.

Sign in to the App Store with the Apple Account you subscribed with, then go to Profile → Subscription → Restore purchases. This restores your subscription, not your invoices. To move your invoices, restore a backup (see below).

Go to Profile → Subscription → Change or cancel plan, or open Settings on your iPhone, tap your name, then Subscriptions. Cancel at least 24 hours before your plan renews to avoid the next charge. Deleting ktak doesn't cancel a subscription. See Apple's guide to cancelling.

Apple handles refunds. Ask through reportaproblem.apple.com.

ktak has no account or cloud sync. Your invoices are stored on your phone, and ktak keeps the last seven daily recovery copies there too. Recovery copies can't help if you lose your phone or delete the app.

To keep a copy somewhere else, go to Profile → Backups → Export backup and save the file to Files or iCloud Drive. The backup holds every invoice, client and PDF. ktak doesn't encrypt it, so keep it somewhere you trust.

On your old phone, export a backup. On your new phone, install ktak and choose "Restore from a backup" on the welcome screen, or go to Profile → Backups later. ktak is set up exactly as it was, including your next invoice number. Then restore your purchase.

It's off unless you turn it on. Use "Share anonymous usage" in Profile → Privacy and help. It never includes clients, amounts or invoice contents. Read the privacy policy for details.

Email support@ksak.app. For subscription records, include your Support ID from Profile → Subscription so we can find them without an account. Never send your Apple Account password or card details. We can't access invoices on your phone, because we never receive them.