Comparison

Relay Secure Messenger vs Katt messenger

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Relay Secure Messenger

This app offers a unique voice communication experience by transcribing speech on your device, encrypting it as text, and reconstructing it in your voice privately in real-time. It ensures conversations remain yours by never transmitting raw audio over the network.

Highlights
  • On-device speech transcription
  • End-to-end encrypted text transmission
  • Real-time voice reconstruction
  • No raw audio transmission
  • Private conversations
  • Ad-free experience
Features
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Relay reimagines voice communication from the ground up. When you make a call on Relay, your voice never travels the network as audio. Speech is transcribed on your device, encrypted, and transmitted as text. On the other end, your words are reconstructed in your voice but privately, in real time. Your conversations stay yours. How it works? Speech is transcribed locally on your device. Text is encrypted end-to-end using the McNeal Protocol. Your cloned voice plays on the receiver's device. No raw audio ever leaves your phone. Built for people who mean it Whether you're protecting sensitive business conversations or simply believe your voice calls shouldn't be anyone else's business, Relay was built for you. What makes Relay different? Most encrypted apps protect your messages in transit. Relay goes further because the audio itself is never transmitted. There's nothing to intercept. End-to-end encrypted messaging. Voice calls without audio transmission. On-device speech processing. No ads. No data selling. Ever. Your calls. Your voice. Your terms.

About

Katt messenger

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MESSAGING - Private chats in real time: messages arrive instantly - Photos and videos straight from the camera or the gallery - Voice messages for when typing takes too long - Files and documents - Emoji reactions on any message - Replies, forwarding and deleting messages - Typing indicator and read receipts - See which contacts are online and when they were last active AUDIO AND VIDEO CALLS - High-quality calls directly between devices - An incoming call rings like a regular phone call, even when the app is closed - Switch cameras, mute the microphone and use the speaker during a call - Drag your own video to any corner of the screen MAKE SOMETHING FOR YOUR PEOPLE - Songs: describe the mood and Katt writes a song, even in your own voice - Photo editor: give a favorite photo a new look - Astrology: a personal conversation based on your birth chart Messaging and calls are free. Creating uses tokens: get them with a subscription (Basic, Plus, Pro) or buy a top-up pack. The subscription renews automatically until you cancel it in your App Store account settings. What you create in these sections is not protected by end-to-end encryption; this is explained in detail in the Privacy Policy. NOTHING EXTRA - Instant notifications that are easy to turn off - Mute or snooze notifications for any chat - Light and dark themes - A light app: it starts fast and is easy on the battery PRIVACY Katt does not ask for unnecessary permissions. There are no ads, and your conversations are not used to build a profile of you. All data travels over a secure connection, and messages are available only to you and the person you are talking to. Sign-up takes a few seconds. Find your contacts and start talking. Privacy Policy: https://katmessenger.com/#privacy Terms of Use: https://katmessenger.com/#terms

Screenshots

Relay Secure Messenger4 screens
Katt messenger3 screens

Verdict

The call

The clearest difference is in-app purchases: Relay Secure Messenger at none against Katt messenger's 6. Katt messenger's advantage is update cadence (weekly vs every 3 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Katt messenger sells 6 in-app purchases, starting at $4.99 per month. Relay Secure Messenger asks for nothing beyond the download.

UpkeepUpdate frequency

Relay Secure Messenger ships an update every 3 weeks, Katt messenger weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 5 level
Relay Secure Messenger versus Katt messenger: the parameters behind the verdict, then further details
ParameterRelay Secure MessengerKatt messenger
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS26.015.0 — better
Further details — not scored
Size33 MB114 MB
Age rating4+12+
DeveloperAntonio LambertAndrei Baburin

In-app purchases

None

Relay Secure Messenger

No in-app purchases

6 purchases

Katt messenger

Subscriptions3
  • Basic$4.991 Month
  • Plus$9.991 Month
  • Pro$19.991 Month
One-time3
  • 30 tokens$1.99
  • 80 tokens$4.99
  • 180 tokens$9.99

Questions

Is Relay Secure Messenger free?
Relay Secure Messenger is free to download, with no in-app purchases.
Is Katt messenger free?
Katt messenger is free to download, with in-app purchases available.
Do Relay Secure Messenger or Katt messenger have ads?
Neither Relay Secure Messenger nor Katt messenger shows ads.
Which is updated more often, Relay Secure Messenger or Katt messenger?
Relay Secure Messenger ships an update every 3 weeks, and Katt messenger weekly. Most recently, Relay Secure Messenger was updated on October 30, 2026 and Katt messenger on October 31, 2026.

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