Cyfo Anti-Hack Pro
An on-device security scanner that turns an opaque phone into a readable risk report — without shipping user data anywhere.
View the live product
- Client
- ST7 Surveillance Solutions
- Industry
- Security
- Year
- 2026
- Platforms
- Android
- Our role
- Product design, mobile engineering, security architecture, store release
01 — Context
Where this started.
ST7 Surveillance Solutions wanted a consumer security product that did not insult its user. Most mobile security apps present a red screen, a scare number and a subscription prompt; almost none tell you what was actually found or what to do next.
02 — Challenge
The hard part.
Two constraints pulled against each other. The scan had to be genuinely useful — apps, files, Wi-Fi, Bluetooth, patch level — and it had to be privacy-first, which rules out the usual approach of uploading everything to a cloud scanner. It also had to stay light enough to run on the mid-range devices that need it most.
03 — Strategy
What we decided.
We built the analysis to run on the device. Nothing leaves the phone, which removes the central privacy objection to security software and, as a side effect, removes the backend from the threat model entirely. The product’s value then had to come from the quality of its explanation rather than from a server, so we treated the report as the deliverable.
Product screens
04 — Experience
How it works for the person using it.
Every finding is stated in plain language with a specific remediation, and each remediation is a single tap. Results are ranked by real risk, not by count — a scanner that flags forty harmless permissions to look thorough teaches its user to ignore it.
05 — Engineering
How it is built.
App and file inspection, Wi-Fi and Bluetooth connection analysis and security-patch checks all execute locally. The build was kept deliberately lightweight so that scan time stays acceptable on mid-tier hardware, and so the app itself does not become the performance problem it is meant to detect.
- Flutter
- On-device analysis
- Android security APIs
- Google Play
06 — Feature stories
The decisions that mattered.
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Deep app and file scanning
Installed applications and stored files are inspected on-device, producing a ranked risk report with a stated reason for each finding.
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Connection analysis
Wi-Fi and Bluetooth connections are examined for suspicious activity — the attack surface most consumer security tools ignore entirely.
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Patch-level checks
Device security update status is checked and outstanding patches are surfaced with a clear recommendation.
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One-tap remediation
Every result carries an action. The report ends in something the user can do, not in a number they cannot interpret.
07 — Results
What we can prove.
- 5.0★
- Play Store rating
- 100+
- Installs
- 0
- User data leaving the device
Source: Google Play listing
Source: Google Play install band
Source: On-device architecture, Play listing
Only verifiable figures appear here. We do not publish uplift percentages or revenue claims we cannot evidence, and we do not restate a client's internal numbers as our own.
08 — Ownership
What was handed over.
At launch, everything below transferred to ST7 Surveillance Solutions. Nothing in this product depends on DevXAI to keep running.
- Full Git repository with commit history
- Infrastructure and store accounts in the client’s own name
- Architecture and deployment documentation
- Walkthrough session with the client’s team
- 30-day post-launch defect warranty
Client testimonial
DevXAI engineered our Cyfo Anti-Hack app with enterprise-grade security and flawless architecture. They didn't just build an app — they architected a system that scaled effortlessly from day one.
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