Comparison

Post Quantum Secure Chat vs SCRT Chat

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

Head to head
About

Post Quantum Secure Chat

Features
Read full description

Secure messaging for the quantum era. PQC Chat is the first consumer messaging app built with NIST-standardized post-quantum cryptography. While traditional encryption may be vulnerable to future quantum computers, PQC Chat uses ML-KEM-768 and ML-DSA-44 algorithms to ensure your private conversations remain private — today and tomorrow. Why Post-Quantum Security Matters Quantum computers pose a real threat to current encryption standards. Data encrypted today could be stored and decrypted later when quantum computers become powerful enough. PQC Chat protects you against this "harvest now, decrypt later" threat. Key Features • True End-to-End Encryption — Messages are encrypted on your device and can only be read by the intended recipient. Not even we can access your conversations. • NIST-Approved Algorithms — Built with ML-KEM-768 for key exchange and ML-DSA-44 for digital signatures, the same standards adopted by governments worldwide. • Secure Image Sharing — Photos are encrypted before leaving your device, ensuring complete privacy for all shared media. • QR Code Contact Verification — Verify contacts in person by scanning QR codes, preventing man-in-the-middle attacks. • Real-Time Messaging — Instant message delivery with read receipts and typing indicators. • No Phone Number Required — Create an account without sharing personal information. • Cross-Platform — Message friends on any device seamlessly. Privacy by Design - No message content stored on servers - No tracking or analytics - No ads, ever - Open cryptographic standards About Post-Quantum Cryptography PQC Chat implements the Federal Information Processing Standards (FIPS) 203 and 204, published by the National Institute of Standards and Technology (NIST) in August 2024. These represent the gold standard in quantum-resistant cryptography. Protect your conversations for the future. Download PQC Chat today. Terms of Use (EULA): https://pqcnow.com/terms-of-service

About

SCRT Chat

Create and share custom secret languages for private conversations. Encode and decode messages locally on your device without an internet connection. Perfect for inside jokes and secure communication.

Highlights
  • Create custom secret languages
  • Generate unique translation keys
  • Translate text into secret code
  • Decode messages with friends
  • Fully private, local processing
  • Offline functionality
Features
Read full description

How to Use SCRT: 1. Create Your Secret Language: – Choose the complexity of your secret language – SCRT generates a translation key you can share with friends 2. Translate Any Text – Type or paste your message – Tap “Translate” to convert it into your secret language 3. Decode with Friends – Share the encoded text and your key – Friends open SCRT, paste your message, tap “Translate,” and read the original message Why SCRT? SCRT isn’t just another translator—it hands you the power to invent your own private code. Perfect for inside jokes, secret plans, or just having fun without worrying about prying eyes. - Fully Customizable: Choose your own cipher difficulty and generate unique secrecy keys to fit any level of challenge. - Fully Private: All encoding and decoding runs locally on your phone. SCRT never sees or stores your messages. - Works Offline: Your secret translations happen entirely on your device—no internet required. Ready to have conversations in your secret language? Download SCRT now and turn every message into your personal cipher! Support & Feedback Have suggestions or need help? Email us at info@scrt.chat Note: SCRT sharing with friends require an in-app purchase. TERMS: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Post Quantum Secure Chat4 screens
SCRT Chat4 screens

Verdict

The call

The clearest difference is ads: Post Quantum Secure Chat at none against SCRT Chat's shown. Post Quantum Secure Chat also leads on iOS requirement (13.0 vs 15.1). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Post Quantum Secure Chat sells 2 in-app purchases, starting at $4.99 per month and SCRT Chat sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Post Quantum Secure Chat ships an update every 10 days, SCRT Chat weekly. The most recent releases landed on September 6, 2026 and September 8, 2026 respectively.

Scorecard2 real differences · 7 level
Post Quantum Secure Chat versus SCRT Chat: the parameters behind the verdict, then further details
ParameterPost Quantum Secure ChatSCRT Chat
PriceFreeFree
Rating—3.8 (4 ratings) — better
Number of ratings—4 — better
Update frequencyEvery 10 daysWeekly — better
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size35 MB53 MB
Age rating4+4+
DeveloperSAYMATIK BILISIM VE TEKNOLOJI ANONIM SIRKETIMIU Digital Limited

In-app purchases

2 purchases

Post Quantum Secure Chat

Subscriptions2
  • Monthly Subscription$4.991 Month
  • Annual Subscription$29.991 Year
8 purchases

SCRT Chat

One-time8
  • 1 Friend Bundle$0.99
  • 1 Friend Bundle$1.99
  • 3 Friends Bundle$1.99
Show 5 more
  • 3 Friends Bundle$3.99
  • 5 Friends Bundle$3.99
  • 10 Friends Bundle$4.99
  • 5 Friends Bundle$6.99
  • 10 Friends Bundle$9.99

Questions

Is Post Quantum Secure Chat free?
Post Quantum Secure Chat is free to download, with in-app purchases available.
Is SCRT Chat free?
SCRT Chat is free to download, with in-app purchases available.
Do Post Quantum Secure Chat or SCRT Chat have ads?
SCRT Chat shows ads; Post Quantum Secure Chat does not.
Which is updated more often, Post Quantum Secure Chat or SCRT Chat?
Post Quantum Secure Chat ships an update every 10 days, and SCRT Chat weekly. Most recently, Post Quantum Secure Chat was updated on September 6, 2026 and SCRT Chat on September 8, 2026.

Other comparisons