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Harden Mobile Apps

Category: Security  ·  Sub-category: web-security  ·  Last updated:
cloud:firebase
Static and runtime hardening for Android and iOS apps running on devices an attacker controls: APK/IPA reverse engineering, rooted or jailbroken devices, Frida or Xposed hooking, repackaging, certificate pinning bypass, and secrets read from local storage (MITRE ATT&CK Mobile T1617, T1540, T1626, T1655, T1638, T1634, T1533). Signals come mostly from server-side attestation: Google Play Integrity verdicts, Apple App Attest and DeviceCheck, Android Key Attestation, Firebase App Check, RASP tamper events, and MDM/UEM compliance. Gives hardening controls (TLS pinning, Keystore/Keychain storage, obfuscation, RASP, attestation enforcement), detection, a hunt, and OWASP MASVS mapping. Use when hardening or reviewing an Android or iOS app, pinning TLS or storing secrets on a mobile client, choosing between Play Integrity, App Attest, and App Check, triaging root/jailbreak or Frida alerts, or hunting repackaged clients hitting your API.
Security AStatic scan found no risk patternsHow grading works ›

What this skill does

Harden Mobile Apps is a community-contributed Claude Code skill in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/harden-mobile-apps/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when hardening or reviewing an Android or iOS app, pinning TLS or storing secrets on a mobile client, choosing between Play Integrity, App Attest, and App Check, triaging root/jailbreak or Frida alerts, or hunting repackaged clients hitting your API.

Who uses this skill

The Harden Mobile Apps Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 211,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/harden-mobile-apps
curl -L https://claudskills.com/skills/harden-mobile-apps/SKILL.md \
  -o ~/.claude/skills/harden-mobile-apps/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/harden-mobile-apps/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/harden-mobile-apps/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\harden-mobile-apps\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Harden Mobile Apps Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/harden-mobile-apps/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Harden Mobile Apps skill do?
Static and runtime hardening for Android and iOS apps running on devices an attacker controls: APK/IPA reverse engineering, rooted or jailbroken devices, Frida or Xposed hooking, repackaging, certificate pinning bypass, and secrets read from local storage (MITRE ATT&CK Mobile T1617, T1540, T1626, T1655, T1638, T1634, T1533). Signals come mostly from server-side attestation: Google Play Integrity verdicts, Apple App Attest and DeviceCheck, Android Key Attestation, Firebase App Check, RASP tamper events, and MDM/UEM compliance. Gives hardening controls (TLS pinning, Keystore/Keychain storage, obfuscation, RASP, attestation enforcement), detection, a hunt, and OWASP MASVS mapping. Use when hardening or reviewing an Android or iOS app, pinning TLS or storing secrets on a mobile client, choosing between Play Integrity, App Attest, and App Check, triaging root/jailbreak or Frida alerts, or hunting repackaged clients hitting your API.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Harden Mobile Apps skill?
Use Harden Mobile Apps when your Claude Code task falls under the Security category — specifically in the web security area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Harden Mobile Apps" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the Harden Mobile Apps skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Harden Mobile Apps is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
umbrasec-labs. (2026). Harden Mobile Apps [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/harden-mobile-apps/
BibTeX
@misc{harden-mobile-apps-2026,
  author    = {umbrasec-labs},
  title     = {Harden Mobile Apps [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/harden-mobile-apps/}
}

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Security scan

Grade A · scanned 2026-10-25 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/harden-mobile-apps/#security)

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More Security skills

Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Security skills → Top 100 skills
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