Flex Messenger vs Graf Chat
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Unlimited messaging
- File sharing (any type)
- Large group chats
- Free HD voice and video calls
- Cross-device sync
- End-to-end encryption
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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.
Graf Chat
A secure messaging app prioritizing privacy with end-to-end encryption and no phone number requirement. It offers biometric app lock and screenshot protection, with tools to block and report abuse.
- End-to-end encrypted chats
- No phone number required for sign-up
- Biometric app lock
- Screenshot protection
- Block and report tools
- Interoperable with Matrix homeservers
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Graf is a security-first private messenger built on the open Matrix protocol. - Username sign-up, no phone number required - End-to-end encrypted 1:1 chats (you hold the keys) - Biometric app lock and screenshot protection - Block and report tools; zero tolerance for abuse - Talk to anyone on Graf or any Matrix homeserver Private by default. We can't read your messages.
Screenshots
Verdict
The clearest difference is update cadence: Graf Chat at every 2 days against Flex Messenger's every 6 months. Graf Chat also leads on review sentiment (100% vs 80%) and ratings volume (3 vs 1). Flex Messenger's advantage is device support (3 vs 1) and iOS requirement (8.0 vs 17.0). On price, rating, ads and in-app purchases 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.
On the App Store both sit at effectively the same score — 5.0 for Flex Messenger against 5.0 for Graf Chat. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews are what separate them: 80% of Flex Messenger's written reviews are positive against 100% of Graf Chat's.
Flex Messenger ships an update every 6 months, Graf Chat every 2 days. The most recent releases landed on October 12, 2026 and October 6, 2026 respectively.
| Parameter | Flex Messenger | Graf Chat |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (3 ratings) |
| Positive reviews | 80.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 6 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 120 MB | 170 MB |
| Age rating | 4+ | 17+ |
| Developer | Colbook Investment Limited | Venture Deals, Co. |
Customer experience
Flex Messenger
Graf Chat
In-app purchases
Flex Messenger
No in-app purchases
Graf Chat
No in-app purchases
