# Arc - DefenseTech Messenger — Live your own story > Secure, private, and resilient messaging with ephemeral conversations and mesh networking. (iPhone/iPad app by Atlas Associates Inc.) - Source: https://appshunter.io/ios/app/arc-defensetech-messenger/id1586821073 (this page in markdown: same URL + `.md`) - Developer: [Atlas Associates Inc](https://appshunter.io/developer/1586821075) - Category: Social Networking, Entertainment - Price: Free - Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed - Age rating: 12+ - Requires: iOS 16.0 · 171 MB - Languages: American English, Hindi, Japanese, European Spanish - Released: 2021-10-15 - Data updated: 2026-08-10 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/arc-defensetech-messenger/id1586821073/reviews.md ## What is Arc? Arc: Sovereign Dual-Tech Messenger We are still an unnamed startup, but we have destroyed the concept of messengers from the ground up to protect user privacy and communication freedom from unauthorized surveillance and data interception. While currently a beta version centered on DMs (individual messages), we are releasing it early so you can experience our world-class defense technology (Dual-Tech) directly tied to national sovereignty, individual sovereignty, and security during emergencies. ・National Security-Grade Multi-Layered Defense Post-Quantum Cryptography (PQC) Hybrid Key Exchange Standardizing "PQXDH + ML-KEM-1024" to completely neutralize decryption threats from future quantum computers (Harvest Now, Decrypt Later). AEGIS (Arc Enhanced Guard & Integrity System) Digital Signature Our proprietary technology that mathematically guarantees message authenticity. Completely eliminates tampering, impersonation, and man-in-the-middle attacks. Complete Anonymization (Sealed Sender) Absolute privacy where even the server cannot know metadata like "who sent what to whom and when," let alone the communication content. ・Aesthetics of Disappearance — Instant Data Erasure 48 Disappearance Animation Patterns Based on the core concept "Ignite the Fire (IGF)," a beautiful animation triggers when a message disappears, completely erasing data from servers and devices without a trace. Delight Reaction Function Sending specific icons triggers random animations, bringing new color to private conversations. ・Independent Mesh Communication Even in Infrastructure Collapse BLE Mesh Network Even during "emergencies" when the internet or cellular networks are completely down due to communication outages, disasters, or censorship, users can safely relay and exchange E2EE messages via Bluetooth (BLE) with nearby devices. ・Zero Server Exposure Complete On-Device AI (Coming soon) Independently Operating AI Characters We are developing translation AI "Rosetta" and summarization AI "SUM" that operate standalone purely within the device (locally), completely eliminating data exposure to external servers or clouds. ・About Early Access (Beta Testing) Free Access Until August 31, 2026 All premium features are unlocked without credit card registration. Currently, the DM function is fully operational. Notice Regarding Updates To prioritize security enhancements and optimization, high-frequency updates may cause past messages to become un-decryptable (data reset). Please maintain alternative contact methods if necessary. Uncompromising aesthetics and top-tier defense technology (DefenseTech) from Japan bring true privacy and communication freedom to the world. ## Key features - National security-level encryption - Post-Quantum Cryptography - Complete anonymity (Sealed Sender) - Mesh network for offline communication - High-ratio data compression - Ephemeral messages (Ignite the Fire) ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/arc-defensetech-messenger/id1586821073/reviews.md ### 5/5 — Great app *2023-10-04* Amazing app, beautiful design. I love it! ## Frequently asked questions about Arc ### What makes Arc's security so advanced? Arc utilizes the Signal Protocol, enhanced with proprietary 4 Encryption Methods and 3 Security Layers. It features Post-Quantum Cryptography (PQXDH + ML-KEM-768) for future-proofing and AEGIS for mathematical guarantees of message authenticity and integrity. ### Can I use Arc without an internet connection? Yes, Arc features a proprietary Mesh Network that allows device-to-device messaging via Bluetooth and other technologies, functioning as a vital backup during internet or mobile network failures. ### How does Arc ensure user anonymity? Arc implements Complete Anonymity through Sealed Sender, making it impossible for even the server to know who sent a message to whom. Metadata is kept entirely private and beyond the reach of any third party. ### What is the 'Ignite the Fire' feature in Arc? Ignite the Fire is Arc's concept for liberating users from digital records. All messages are completely erased from devices and servers after a set period, allowing for dialogue free from permanent records. ### Does Arc have ads? Yes, Arc contains advertisements. As a free application, it utilizes ads to support its services. ### What devices support Arc? Arc is currently supported on iPhone and iPad devices, indicating compatibility with Apple's mobile operating systems. ### How often is Arc updated? The application is frequently updated, as indicated by its latest version being 8.0.2, released on March 17, 2026, suggesting an active development cycle. ### What is the age rating for Arc? Arc has an age rating of 12+, suggesting it is suitable for users aged 12 and above. ## Version history (last 5 releases) ### 9.1.4 — 2026-08-07 Bugs fixed. ### 9.1.2 — 2026-07-27 Bug Fixed. ### 9.1.1 — 2026-07-23 Bug fixed ### 9.0.6 — 2026-07-19 Smoother, more reliable messaging - Data resets possible (backup contact methods advised). - Enhanced Read-or-Lose, PQXDH, mesh, and AI characters. - New: Retransmission requests and self-destruct after reading. ### 8.2.5 — 2026-04-10 Fixed the encryption. There are still many bugs, so please wait for the official release in May. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-10.*