Your tools are on your laptop. The bug is on the phone.

Test Nexus puts a developer toolkit on the device where the problem happens, so you can test, verify and debug your app from the phone in your hand. Built for Android developers, QA engineers and security testers.

Test Nexus is a developer TESTING tool. It does not issue, register, provide, or facilitate any real government ID, official document, credential, or government service. For government identity formats — passports, driver's licences, national and voter IDs, personal tax references — Test Nexus only CHECKS whether a number you supply matches a published pattern; it does not create values for them. Where it does build a sample value (product codes, courier tracking, vehicle and device IDs, company registrations, universal identifiers), that value is synthetic: not real, not official, not tied to any person, and not accepted by any bank, carrier or authority.

SEE WHAT YOUR APPS ARE DOING
Security Scanner checks every installed app for tracking libraries, risky permission combinations and behaviour worth a second look, then explains what it found with a risk score. The scan runs on your device against databases that ship inside the app — no outside service receives your app list. Test Nexus reports what it finds. It does not block or remove anything.

READ THE LOG ON THE PHONE
Deep Inspector streams logcat on the device. Filter by level, app or keyword, and bookmark the lines you want to keep. Crashes and ANRs arrive with the full stack trace and a plain-English explanation. Granting log access takes one ADB command the first time; then it runs on its own.

GET A BUILD ONTO A REAL PHONE
Remote Install shares a build with your testers over the air from one link, or from your CI pipeline. Every upload is checked against your signing key before it can install. An MCP-capable assistant can push a build to your team's phones for you.

SEE WHAT YOUR OWN APP SENDS
Network Monitor captures, decrypts and replays the HTTP/S requests made by the app you are building. Install the certificate once, choose your app, and watch requests arrive as you tap. Apps that pin their certificates show metadata only.

ALSO IN THE APP
• Mock Location — set your GPS position and follow routes snapped to real streets at real speeds. Holds across app switches.
• Wireless Terminal — SSH and SFTP with port forwarding, plus wireless ADB to another device.
• DataHub — synthetic test profiles for 196 countries: names, addresses, phone numbers and passwords to exercise your input validation. Exports CSV, JSON, XML and TSV.
• IDs & Cards — check a number you supply against published ID and card formats and see why it passes or fails. Personal government IDs, payment cards and bank accounts are checked on the device only, never created, and never checked against any database.
• AI Custom Forms — point it at a form and Gemini fills it with synthetic test data, even unusual fields. Fields naming a personal ID, payment card or bank account are left blank.
• QR Generator — QR codes and barcodes in your own colours, with your logo and no watermark.
• Production Alerts — a push notification from Firebase Crashlytics when your live app crashes or its config changes.

NETWORK MONITOR AND VpnService
Network Monitor uses Android's VpnService to capture and inspect the HTTP/S traffic of an app you choose, on your own device, for debugging — the only way to do this without root. Capture is local: your traffic is never routed through any server and is never uploaded.

WHAT IT COSTS
Free to download, with a free tier. Subscriptions unlock the professional tools and remove ads; the free tier shows ads in IDs & Cards and Mock Location.

PRIVACY
Test Nexus works on the device first: your test data is stored locally in an AES-256 encrypted database, and every generated value is synthetic. Some features use the cloud by design — AI Custom Forms uses Gemini, Production Alerts and Remote Install use Firebase.