Write a letter and send it. Straight from your iPhone.

Write your letter yourself or let the AI draft it. FrankKi prints it and sends it as a real letter by post. No printer, no stamp, no post office.

Download for freeHow it works

App is free · Letters from 3,39 €

FrankKi app, preview of a cancellation letter in the German DIN 5008 format
Real postal deliveryGDPR compliantLive status updates

Secure payment

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Millions of letters a year

A proven partner

Worldwide delivery

Germany, Europe, and beyond

Sending a letter should not be this complicated.

No printer?

You are not alone. Most people do not have one. And the copy shop is already closed.

Deadline running out?

A cancellation deadline, an objection deadline. And the letter has to go out today.

Unsure how to write it?

Getting the wording formally right and following DIN 5008. Who knows all that by heart?

Not in the mood for the post office?

Buy a stamp, find an envelope, walk to the mailbox. So analogue.

Need proof of delivery

Sending a registered letter means standing in line at the post office.

Where do I even start?

You know what you want to say, just not how to put it formally on paper.

How it works

A finished letter in 3 steps.

Send a letter now →
1

Write

Write your letter yourself or let the AI draft it for you. Templates for cancellations, objections, and more.

2

Review

FrankKi formats your letter automatically in the German DIN 5008 standard. Check the preview, enter the address, choose the shipping option.

3

Send

FrankKi prints your letter, puts it in an envelope, and posts it for you. You follow every step live in the app.

Features

Everything you need. Nothing you do not.

AI writing assistant

Tell the AI what you want to write. It puts it in formally correct German. Cancellation, objection, complaint, or free text.

DIN 5008 automatically

Every letter is formatted automatically in DIN 5008. Sender, recipient, date, subject. All in the right place.

Real postal delivery

Your letter is printed, put in an envelope, and delivered by post, worldwide. Like a real letter, because it is one.

Letter templates

Ready-made templates for the most common needs: cancellation, rent reduction, objection, letters to authorities, and more.

Registered letter (Einwurf)

Send as a drop-in registered letter. Delivered with a proof of mailing, no recipient signature. From €7,59.

Registered letter (signature)

Send with hand delivery. Delivered against the recipient signature. From €8,19.

Status tracking

Follow the status of your letter in the app. From order to dispatch.

Use cases

A letter for every occasion.

Write your first letter →

Cancellation

Gym, insurance, phone contract. Cancelled in 2 minutes. Live status in the app. As a registered letter if you want.

Objection

Wrong decision? An invoice that is too high? Write your objection and send it by post within the deadline.

Tenancy law

Rent reduction, defect notice, service charge statement. formally correct to your landlord.

Authorities

A letter to the tax office, your health insurer, or the job centre. The AI helps you with official German.

Pricing

From €3,39 per letter. No subscription.

You only pay when you send a letter. By card or Apple Pay. No credit balance, no subscription, no surprises.

  • ✓Printing, envelope & postage included
  • ✓The price is shown before you send
  • ✓Pay only for what you need
  • ✓Refund if there is a delivery problem

Standard letter

from €3,39

Black and white · €3,49 in colour · incl. VAT.

Registered (Einwurf)from €7,59
Registered (signature)from €8,19

All prices include printing, envelope & postal delivery.

Privacy

Your letter. Your data. Your control.

Deleted after printing.

Your letter PDF is deleted automatically after it is printed.

No ads. No tracking.

FrankKi shows no ads and does not track you.

Only what is needed.

We process only the data needed for printing and delivery.

GDPR compliant.

Servers in Germany. Data protection to EU standards.

Real postal delivery.

Your letter is delivered reliably through the postal network.

Your card stays with Stripe.

We never see your card details. Payment runs securely through Stripe.

Frequently asked questions

How does sending a letter work?
You write your letter in the app, yourself or with AI help. FrankKi formats it in DIN 5008, prints it on real paper, puts it in an envelope, and posts it. You follow every step live in the app.
Do I need a printer?
No. That is the whole point. FrankKi handles printing, the envelope, and posting completely. All you need is your iPhone.
How long does delivery take?
A standard letter is delivered within 1 to 3 working days inside Germany. International delivery times depend on the destination.
What does a letter cost?
A standard letter costs from €3,39 (black and white) or €3,49 in colour. A registered letter starts at €7,59. You pay directly by card or Apple Pay. No subscription, no credit balance. You see the exact price before you send. International prices are calculated per destination.
Can I send a registered letter?
Yes. You have two options to choose from: registered Einwurf (delivered with a proof of mailing, no signature, from €7,59) and registered with signature (handed over personally against the recipient signature, from €8,19). Both with tracking.
Do I get a tracking number?
Standard letters do not have a tracking number. You see the status of your letter in the app: ordered, printed, sent. After sending we show you the estimated delivery window (1 to 3 working days in Germany). For real tracking with proof of delivery, choose a registered letter: as Einwurf (with proof of mailing) or with signature (handed over against signature).
Is it legally valid?
Yes. Your letter is printed on real paper and delivered by post, identical to a letter you posted yourself.
What can the AI do?
The AI drafts your letter based on your description. You say, for example, "I want to cancel my gym membership", and the AI writes a formally correct cancellation letter. You can edit the text afterwards at any time.
Is my data stored?
Your letters are stored locally on your iPhone. To send a letter it is transferred once to the print service provider and deleted after printing. No account needed. No ads. No tracking.

Your next letter. Done in 2 minutes.

No printer. No stamp. No post office. Just your iPhone.

Download free on the App Store