Support

Help & Support

Everything you need to use PcapDecoder, plus answers to common questions.

Email: lingnanxinke@agent.qq.com — including account deletion requests when you cannot sign in (write from your account email and say you want the account deleted).

We typically reply within 1–2 business days.

Analysis: open a PCAP/PCAPNG file or a live capture; browse protocol hierarchy, conversations, packet details and expert info; use Wireshark-style display filters and follow TCP/UDP streams.
Threat detection: import your own threat lists (IP/CIDR/domain) — matching runs entirely on-device; built-in heuristics flag trojan-default ports and suspicious fingerprints.
Geo location: download the IP-to-country database from Settings (fetched from db-ip.com directly to your device) to see where conversations go. Queries are local and never contain capture content.
Remote capture: SSH capture connects directly to your server and runs tcpdump there, streaming back to your device; UDP listener receives pushes from capture apps such as PCAPdroid on your LAN.
Reports: one-tap Markdown/PDF analysis reports are generated on-device and saved locally — share them as you wish.

Sign-in: email + password, or Sign in with Apple. You can use all local features without any account; cloud AI works anonymously with a generated device identifier.
Forgot password? Use "Forgot password" on the sign-in dialog to reset via an email code. (Apple private-relay accounts without a real mailbox: keep signing in with Apple.)
Delete my data / account: Settings → Account → Delete Account. Choose "remove this App's data only" or "delete my entire account" (irreversible, immediate). If you cannot sign in, email us from your account address.

Free / anonymous: 10 requests/day. PRO+ subscription: 100/day. A report generation counts as 3. The counter resets daily; remaining quota shows in the AI panel.
A failed cloud call is never charged. If you see "quota exceeded", wait for the next day or upgrade via the Pro page.
BYOK (PRO entitlement): add your own API key in the AI settings (OpenAI-compatible / Anthropic / Gemini endpoints). Requests go directly to your endpoint, not through our servers; the key stays in your device's system secure storage.

Purchases are billed by Apple / Google. Subscriptions renew automatically unless cancelled at least 24 hours before period end; manage them in your store's subscription settings.
Membership missing after reinstall or on a new device? Tap Restore Purchases on the paywall; make sure you use the same store account and sign in with the same App account.
Refunds are handled by the store (App Store "Report a Problem" / Google Play refund flow).
Desktop editions have no purchase entry — buy on mobile, then sign in with the same account.

File won't open? The App supports standard PCAP/PCAPNG. Very large files (>1 GB) are indexed progressively in the background — analysis works while indexing continues.
Cloud AI not responding? Check backend reachability in Settings (the backend address is configurable for dev/test). A 401 means your sign-in expired — sign in again; 429 is quota.
No geo info? Download the GeoIP database in Settings first; you can refresh it any time.
Still stuck? Email us what you did and what you saw — screenshots help a lot.