Comparison

Crypviser Secure Messenger vs Uup Anonymous

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

Head to head
About

Crypviser Secure Messenger

This app offers a highly secure and anonymous messaging experience using blockchain technology. Enjoy private chats, video calls, and file sharing with military-grade encryption and decentralized key management. It prevents man-in-the-middle attacks and does not require personal information for registration.

Highlights
  • Blockchain-based encryption
  • Anonymous messaging
  • Private video and voice calls
  • Encrypted file sharing without size limits
  • Man-in-the-Middle attack detection
  • Multi-device support
  • Secure message synchronization
Read full description

Тhe New Standard of Security and Anonymity. Crypviser  is the most private messaging app, as it is based on Blockchain technology. The decentralized Crypviser Messenger lets you to enjoy private video chat & voice calls with automated blockchain encryption. There are no other alternatives available on the market. We utilize Blockchain to eliminate all threats of Man-in-the-Middle attack and solved the historical public key encryption issue by using decentralized encryption keys, exchanges, and authorization algorithms. Your Messages, Videos, Photos, Data, etc will reach their destination unfiltered, and most importantly UNBLOCKED! WHY SHOULD YOU USE CRYPVISER AS YOUR REGULAR CHAT, VOICE & CALLS MOBILE APP? Crypviser is based on Instant Communication Platform which cannot be Blocked or Stopped, Totally Anonymous, Bullet Proof Security using Military Grade Encryption, Salsa 20/20, Ecliptic Curve Cryptology, 512 Hash, Decentralized. Our instant private messenger has introduced a new era of cryptography based on Blockchain technologies. Attacks on your text message are impossible because crucial encryption keys are truly authenticated and distributed among thousands of blockchain nodes. Anonymous. One of our core features is, that only you should decide which text message is to be made public and which isn´t. Crypviser is the unique secure chatting app which doesn't require your phone number or perform SMS verification. Highly Secure. Send text message with our security protocol developed on genuine end-to-end encryption and blockchain based authentication algorithms exceed today´s requirements against all kinds of threats. File sharing. Enjoy sharing as many encrypted and private files, photos or videos as you want without size restriction. So we expand our boundaries from usual smm messenger and allow you limitless activities. Use our video calling app for all media sharing you need. Intrusion Detection. Detect and prevent MiTM ("Man-in-the-Middle") attacks by third parties through network. You will be always informed about eavesdropping attempts by third parties, where an attacker may stealthily listening to the private conversation without your consent. Multi-device support. Enjoy maximum convenience of running encrypted sms in the same message app's account on different devices. Secure sync. Have all your private messages and information synchronized to all your devices while being totally protected in encrypted mode.

About

Uup Anonymous

This app provides secure and anonymous communication through a decentralized network. It uses advanced encryption and a trustless system to protect user identity and data, enabling private text and large file transmissions.

Highlights
  • Anonymous communication
  • Decentralized server network
  • End-to-end encryption
  • Secure text and file transmission
  • Trustless system
  • Open-source data encryption
Read full description

Anonymity is the integral aspect the UUP technology is built on. A group of servers, which do not have access to the whereabouts of the person that connects, form a network at the lower level. Each client is provided with a public key as well as a private key, both of which are not sent to the server. This way, the identity of the user is protected. The hash algorithms derived from the client's device are irreversible making it impossible to trace the public key corresponding to the communication channels open on the server. There are two libraries at the device level. One deals with the transmission protocol with the server while the other deals with a high performing protocol that works at the byte level in the binary to extract the maximum potential of the hardware without weighing down the machine. From simple texts to large video broadcasting, the expandable "point to multipoint" protocol can be used for the massive transmission of encrypted data. The intrinsic speed of the server makes large file transmissions possible. Unlike competing applications, the under-development protocol of UUP guarantees a high level of security and confidentiality through a trustless system and open-source data encryption. Instead of using the notification centers of Google, Apple, or Microsoft, the system acts as a notification center so that nobody, including the system, can make a network of correlation between individuals who use the infrastructure.

Screenshots

Crypviser Secure Messenger4 screens
Uup Anonymous4 screens

Verdict

The call

The clearest difference is rating: Crypviser Secure Messenger at 4.5 against Uup Anonymous's 3.7. Crypviser Secure Messenger also leads on ratings volume (81 vs 3) and iOS requirement (13.0 vs 15.0). Uup Anonymous's advantage is review sentiment (100% vs 76%) and update cadence (fortnightly vs every 5 weeks). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Crypviser Secure Messenger holds the better App Store score, 4.5 against 3.7. That said, the two scores are not equally well evidenced: Crypviser Secure Messenger has 81 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 76% of Crypviser Secure Messenger's written reviews are positive against 100% of Uup Anonymous's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Crypviser Secure Messenger ships an update every 5 weeks, Uup Anonymous fortnightly. The most recent releases landed on August 28, 2026 and September 14, 2026 respectively.

Scorecard5 real differences · 5 level
Crypviser Secure Messenger versus Uup Anonymous: the parameters behind the verdict, then further details
ParameterCrypviser Secure MessengerUup Anonymous
PriceFreeFree
Rating4.5 (81 ratings) — better3.7 (3 ratings)
Positive reviews75.7% of reviews100.0% of reviews — better
Number of ratings81 — better3
Update frequencyEvery 5 weeksFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size170 MB136 MB
Age rating4+4+
DeveloperCrypviser GmbHDaniele Marinelli

Customer experience

Crypviser Secure Messenger

All ratings80 ratings
Positive91.3%
Neutral1.3%
Negative7.5%
Written reviews111 reviews
Positive75.7%
Neutral2.7%
Negative21.6%

Uup Anonymous

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Crypviser Secure Messenger

Reported bugs

13 issues
  • No Internet Connection error despite working network
  • Login screen freezes with password field obscured by popup
  • Captcha validation rejects correct inputs
  • Registration fails with 'insufficient characters' error despite meeting requirements
  • App crashes on iOS 12 and older versions
Show 8 more
  • Messages sent but not received or arrive out of order
  • Disappearing message bombs remain indefinitely if unsent
  • Account requires re-authentication after reinstall
  • Video calls auto-disconnect upon connection
  • App crashes when writing messages
  • Last word of messages gets cut off
  • Contacts list disappears after app crash
  • Repeated payment requests despite active subscription

Requested features

8 requests
  • Dark mode option
  • Custom screensaver/wallpaper support
  • Group chat functionality
  • Better photo selection interface (not scrolling through all photos)
  • Complete screenshot blocking (not just alerts)
Show 3 more
  • More blockchain node/server information in subscription details
  • Improved notification system
  • Better contact management tools

Uup Anonymous

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Crypviser Secure Messenger

No in-app purchases

None

Uup Anonymous

No in-app purchases

Questions

Is Crypviser Secure Messenger free?
Crypviser Secure Messenger is free to download, with no in-app purchases.
Is Uup Anonymous free?
Uup Anonymous is free to download, with no in-app purchases.
Which has better reviews, Crypviser Secure Messenger or Uup Anonymous?
Crypviser Secure Messenger is rated higher. Crypviser Secure Messenger averages 4.5 out of 5 from 81 ratings, while Uup Anonymous averages 3.7 from 3 ratings.
Do Crypviser Secure Messenger or Uup Anonymous have ads?
Neither Crypviser Secure Messenger nor Uup Anonymous shows ads.
Which is updated more often, Crypviser Secure Messenger or Uup Anonymous?
Crypviser Secure Messenger ships an update every 5 weeks, and Uup Anonymous fortnightly. Most recently, Crypviser Secure Messenger was updated on August 28, 2026 and Uup Anonymous on September 14, 2026.

Other comparisons