Codeword · Coming soon to Android
Is it really them? Check while you’re still on the call.
Voice cloning means a scammer can sound exactly like your son or daughter. Codeword is a free app that lets the person being called check with the real family member in one tap, before any money moves.

Fig. 01 · The alert, during the call 
Fig. 02 · Tom is asked straight away 
Fig. 03 · Mum sees the answer 
Fig. 04 · Calm the rest of the time
Real screens from the app, on a test phone. Mum is the person being protected; Tom is the family member she checks with.
- 01 · Set up
One of you invites the other
Usually it’s the grown-up son or daughter. Tom installs Codeword, adds Mum, and sends her an invite link by text or WhatsApp.
Mum taps the link, installs the app and accepts. There are no accounts to create and no codes to copy.
What changesMum’s phone knows who to check with.
- 02 · Notice
An unknown number calls
Her phone rings as normal. Codeword shows a calm alert on top of the call: if they say they’re family and need money, ask for the code word.
It only appears for numbers that aren’t in her contacts, and it never blocks a call.
What changesA pause, at exactly the moment a scam needs you not to.
- 03 · Check
One tap asks the real person
If something feels wrong, Mum taps Check with Tom. Tom’s phone asks him straight away: Mum is on a call. Is it you?
She doesn’t need to hang up, find his number or type anything.
What changesThe check happens while the call is still going.
- 04 · Know
The answer, in seconds
Tom taps Yes or No. Mum sees It’s really Tom, or It’s not Tom. Hang up now, in large, clear type on the screen she’s already looking at.
Either way, she can call Tom back on his usual number with one more tap.
What changesA decision made on facts, not on a familiar-sounding voice.
What it won’t do
Built to be trusted by the people it protects.
- It never blocks a call
Every call rings through as normal. Codeword adds a check; it never decides for you.
- It never listens
Codeword can’t hear, record or read your calls, contacts or messages. It only sees that an unknown number is calling.
- Your code word stays with you
You can keep your family code word in the app as a reminder. It stays on your phone and is never sent to us or backed up anywhere.
- Free to use
Checking with one family member is free, for good, with no adverts. Bigger families can choose the Codeword Family plan.
Codeword works on Android phones running Android 10 or newer. Read more about how it works and what we store.
Pricing
Free for one. Fair for families.
One price covers the whole family, whoever pays.
- Free
One person protected, and one family member to check with. Every alert, every check, no adverts and no time limit.
- Codeword Family · £3.99 a month or £29.99 a year
More people to look out for, more family members to answer, and a history of every check.14-day free trial; cancel any time in Google Play.
Coming soon
Be the first to know.
Leave your email and we’ll tell you the day Codeword is ready to download. Until then, the habit it’s built on costs nothing: set up a family code word tonight.