Relay Secure Messenger vs PGP Chat
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- On-device speech transcription
- End-to-end encrypted text transmission
- Real-time voice reconstruction
- No raw audio transmission
- Private conversations
- Ad-free experience
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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.
PGP Chat
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SecurePGP Chat brings military-grade privacy to your iPhone. Built on the OpenPGP standard, it lets you send and receive encrypted messages that only you and your contact can read — no servers, no tracking, and no data sharing.
Screenshots
Verdict
The clearest difference is update cadence: PGP Chat at every 5 days against Relay Secure Messenger's every 3 weeks. PGP Chat also leads on iOS requirement (15.1 vs 26.0). On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Relay Secure Messenger ships an update every 3 weeks, PGP Chat every 5 days. The most recent releases landed on October 3, 2026 and September 30, 2026 respectively.
| Parameter | Relay Secure Messenger | PGP Chat |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 33 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Antonio Lambert | Sandro Meier |
In-app purchases
Relay Secure Messenger
No in-app purchases
PGP Chat
No in-app purchases








