Instant scanning
Live camera scanning with a torch and a front/back toggle. Results land in a sheet you can copy, or open in a hardened built-in browser instead of handing the link to a random app.
Free · Works offline · No account needed
Scan fast.
Scan fast.
Share instantly.
A QR scanner that never phones home, a studio for building codes worth looking at, and two ways to share what matters — a digital card that updates itself, and a letter that only opens for the right word.
- No ads, ever
- Nothing you type is recorded
- Scanning stays on-device
Everything in one app
Six tools, no clutter
Scanning, generating and history work the moment you install — no account, no network. Signing in is optional and unlocks the sharing features; nothing else depends on it.
The QR Studio
Templates for Website, Wi-Fi, Email, Phone, SMS and plain text. Six palettes, module and finder-eye shapes, and a logo overlay — with a live preview pinned while you tweak.
Searchable history
Your last 100 scanned and generated codes, kept on the device and searchable. Re-render any entry as a QR image and share it again. Cloud backup exists, and is off until you turn it on.
Secret letters
Hide a letter behind a QR code. It unlocks with a word only the two of you know, then types itself out on screen. Your recipient needs no app and no account — just a phone camera.
DigiCard
A digital business card living at one permanent URL. Change your job title next year and every code you ever printed still points at the current you — the card holds the address, not a copy.
NFC tags & share cards
Write your link to a blank NFC tag by holding your phone against it, and frame any QR in one of six share-card templates — romantic, birthday, gift, celebration, professional or minimal.
The QR Studio
Codes that look like they belong to you
Most QR generators give you a black square. This one gives you a live preview and every dial worth having, then exports at a resolution you can actually print.
- Square or rounded modules, square or circular finder eyes
- Drop in a logo — error correction jumps to High automatically so it still scans
- Save straight to your gallery or push it to the share sheet
QR Studio
Content
Style & Color
Logo
Palette
Logo overlay size
Exported as a high-resolution PNG.
Digital Experiences
A letter that only opens for the right word
Write the message in the app, choose a word the two of you share, and QR Teky hands you a code. Whoever scans it meets a lock screen — and the letter types itself out only once the word is right.
- Three themes: Midnight Rose, Deep Emerald, Warm Parchment
- Write your own lock prompt and your own wrong-word reply
- Set an expiry date, or switch it off later without deleting it
💌
Enter our secret word to unlock:
••••••
Unlock
The card on the table doesn't say who it's for — that's off by default.
DigiCard
One card. Every phone. No app on their side.
Your name, role, contact details and links at a single address you can hand out as a QR code, an NFC tag or a plain link. Anyone can open it in a browser and save you to their contacts.
- Edit your details any time — printed codes never go stale
- Write it to an NFC tag once and tap phones to share
- Turn the public page off whenever you want
RJ
Roshan Justin
Product Engineer · Appteky
hello@appteky.com
+91 90000 00000
appteky.com
Write to NFC tag
Try it right here
This is what your recipient sees
No install, no sign-up — the same lock screen a scanned code opens.
The word is the key — literally
There is no password stored anywhere to check your guess against. The word you type derives the decryption key. Get it wrong and there is simply nothing to read; get it right and the letter appears.
Demo secret word: forever — try a wrong one first.
💌
Enter our secret word to unlock:
— sent with QR Teky
Guides
Up and running in three steps
Pick what you came for. Each one takes about a minute.
1
Pick what it holds
Open Generate a QR code and choose a template — Website, Wi-Fi, Email, Phone, SMS or free text. The preview updates as you type.
2
Style it
On Style & Color, choose a palette, module shape and finder-eye shape. Raise error correction if the code will be printed small or on something curved.
3
Add a logo
On the Logo tab, pick an image and set its size. Error correction moves to High on its own so the code survives the overlay.
4
Export
Save a high-resolution PNG to your gallery, or send it straight to the share sheet. It also lands in your history to re-share later.
1
Sign in once
Secret letters live at a public link, so this one needs an account. Tap Digital Experiences and sign in with Google — scanning and generating never ask.
2
Write it
Choose Secret Letter, write your message, and add a sign-off. Optionally name who it's for — off by default, because a card left on a table shouldn't announce that.
3
Choose the word
Pick a word you both know and nobody else would guess. Write your own lock prompt and the reply for a wrong guess. Nobody can recover this word — not even us.
4
Publish and hand it over
Publish to get a QR code. Print it, put it in a card, or write it to an NFC tag. Watch the open count in My experiences, and switch it off any time.
1
Fill in your details
Open My DigiCard and add your name, job title, company, a short bio, and the contact details and links you want to share.
2
Turn the public page on
Under Visibility, switch the public page on. That gives your card a permanent address anyone can open in a browser.
3
Share it your way
Hand it over as a QR code, a plain link, or hold your phone against a blank NFC tag to write it once and tap to share from then on.
4
Edit whenever
Change jobs and just update the card. Every code and tag already out in the world points at the new details — they carry the address, not a snapshot.
Built to know nothing
Your letter is sealed before it leaves your phone
This isn't a server checking a password. The message is encrypted on your device, and what we store cannot be read by us, by an administrator with console access, or by anyone who breached the database.
You write
The message and your secret word exist only in the app, on your phone.
The phone seals it
Your word derives a key — PBKDF2-HMAC-SHA256, 210,000 iterations — and AES-256-GCM locks the letter.
We store ciphertext
Only the sealed envelope, a salt and a nonce. Never the message, never the word, never a hash of it.
They unlock it
Their browser derives the same key from the word you told them and decrypts it locally. A wrong word simply fails.
Scanning never leaves your device
History is local unless you turn on backup
No ads, and analytics that never see your content
No account for scanning, generating or history
Questions
Straight answers
The things people ask before installing.
Does QR Teky work without internet?
Yes. Scanning, generating QR codes and your history all run on the device and need no connection and no account. Only the optional sharing features — DigiCard, Digital Experiences and history backup — use the network.
Do I need an account?
Not for the QR scanner, the generator or history — those work the moment you install. You only sign in if you want a DigiCard, a secret letter, or your history backed up to your own account.
What is a secret letter, and how does it work?
It is a private message hidden behind a QR code. You write it in the app and choose a secret word. The message is encrypted on your phone with a key derived from that word, and only the encrypted result is uploaded. Whoever scans the code sees a lock screen, and the letter appears — typing itself out — once they enter the right word.
Does the person receiving a letter or card need the app?
No. They scan the code with any phone camera and the page opens in their browser. No install, no account, nothing to sign up for.
Can anyone at QR Teky read my secret letter?
No. The message is sealed with AES-256-GCM using a key derived from your secret word (PBKDF2-HMAC-SHA256, 210,000 iterations) before it leaves your phone. What gets stored is the encrypted envelope, a salt and a nonce — never the message, never the secret word, and never a hash of it. Nobody can recover the word for you if you forget it.
Is my scan history uploaded anywhere?
No, unless you switch backup on yourself. By default your last 100 scanned and generated codes are stored only on your device. Backup is off until you enable it, and it syncs to your own private account area.
Can I put a logo in my QR code and will it still scan?
Yes. Add an image on the Logo tab and set its size. Error correction is raised to High automatically when you add a logo, so the code stays readable even with the overlay covering part of it.
Does the app track what I scan or write?
The app uses Microsoft Clarity to see which screens people use and where they get stuck. It is set up with masking applied to the entire app, so the text you type and the images on screen are obscured before anything is sent — your letters, your secret words, your contact details and the contents of codes you scan never leave your device. Scanning itself is still processed on your phone, and there is no advertising SDK.
What does QR Teky cost?
It is free on Google Play, with no ads and nothing to unlock.
Get QR Teky
Free on Google Play. Scanning, generating and history work offline the second it installs.
Get it on Google Play
Scan to install
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