Comparison

Flex Messenger vs Gunter messenger

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

Head to head
About

Flex Messenger

A fast, secure, and free communication app that syncs across all devices. Send unlimited messages, documents, voice memos, images, and videos. Enjoy private group chats and make free HD calls.

Highlights
  • Unlimited messaging
  • File sharing (any type)
  • Large group chats
  • Free HD voice and video calls
  • Cross-device sync
  • End-to-end encryption
Features
Read full description

Flex is a communication app with a focus on speed and security. It’s super-fast, simple, secure and free. Flex seamlessly syncs across all of your devices and can be used on desktops, tablets and phones alike. You can send an unlimited amount of messages, documents of any type (.doc, .zip, .pdf, etc.), voice memos, images and videos. Flex groups doesn't have any limits. Why use Flex? • 100% FREE & NO ADS: Flex will be free forever. We are not going to sell any kind ads or introduce subscription fees. • PRIVATE: No one can contact with you without knowing your exact contact information. Also we are not going to analyze or sell your social graph or any stats based on your communications. • SECURE: We made it our mission to provide the best security among open people-friendly messengers. • FAST: Flex also is very fast. We use newest technology for providing best communication speed. • GROUP CHAT & SHARING: With Flex, you can form large group chats of any size, quickly share large documents (.doc, .ppt, .zip, etc.) and videos, and send an unlimited amount of photos to your partners. • FREE CALLS: Make free phone and video calls with HD sound quality.

About

Gunter messenger

This secure messaging app prioritizes privacy with no servers, accounts, or stored messages. Chats are device-only and can be instantly deleted, with options to edit or remove messages. Enjoy crystal-clear video calls, group chats, and media sharing in a DDoS-proof environment.

Highlights
  • Serverless architecture
  • No accounts or stored messages
  • Device-only chat storage
  • One-tap message deletion
  • Edit and delete sent messages
  • Crystal clear video calls
  • Group chats and media sharing
Features
Read full description

Say goodbye to prying eyes and hello to Gunter—the messenger that’s allergic to servers. Unhackable? Damn right: no accounts, no stored messages, nothing for hackers to grab. Your chats live on your device only—poof, gone when you want. One tap wipes everything, leaving zero traces. Edit or delete messages with a long tap—you control the convo. Video calls? Crystal clear. Group chats and media sharing? Incoming faster than a Tokyo bullet train. DDoS-proof, with the slickest messaging UX around. No data hoarding, no tracking, just pure, untouchable talk. Privacy’s the whole game. Download Gunter and chat like the world can’t touch you.

Screenshots

Flex Messenger4 screens
Gunter messenger4 screens

Verdict

The call

The clearest difference is update cadence: Gunter messenger at every 6 days against Flex Messenger's every 6 months. Gunter messenger also leads on review sentiment (100% vs 80%). Flex Messenger's advantage is device support (3 vs 1) and iOS requirement (8.0 vs 18.0). 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.

UpkeepUpdate frequency

Flex Messenger ships an update every 6 months, Gunter messenger every 6 days. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 6 level
Flex Messenger versus Gunter messenger: the parameters behind the verdict, then further details
ParameterFlex MessengerGunter messenger
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews80.0% of reviews100.0% of reviews — better
Number of ratings1 — better—
Update frequencyEvery 6 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS8.0 — better18.0
Further details — not scored
Size120 MB3 MB
Age rating4+4+
DeveloperColbook Investment LimitedDaniil Surnin

Customer experience

Flex Messenger

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

Gunter messenger

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Flex Messenger

No in-app purchases

None

Gunter messenger

No in-app purchases

Questions

Is Flex Messenger free?
Flex Messenger is free to download, with no in-app purchases.
Is Gunter messenger free?
Gunter messenger is free to download, with no in-app purchases.
Do Flex Messenger or Gunter messenger have ads?
Neither Flex Messenger nor Gunter messenger shows ads.
Which is updated more often, Flex Messenger or Gunter messenger?
Flex Messenger ships an update every 6 months, and Gunter messenger every 6 days. Most recently, Flex Messenger was updated on October 12, 2026 and Gunter messenger on October 14, 2026.

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