FAQ

No. Wi-Fi Share has no accounts — just open the app and use it. We do not ask for email, name, phone or birthday.

Passwords live in your phone's encrypted vault; Wi-Fi Share never uploads them anywhere, and we have no servers of our own. Only if iCloud Backup is on does an iPhone include them in the phone backup in your own account; Android's Google backup deliberately leaves them out.

Reading the name of the Wi-Fi you are connected to requires location permission — that is a system rule on both iPhone and Android. Wi-Fi Share does not ask for location, so it cannot fill the name in. Type it in manually, then generate the QR.

It lets “Scan” find devices on your subnet — routers, NAS, TVs, printers. It is not location, and it does not read photos or contacts.

Free covers the core and QR sharing stays free forever. Premium is NT$30 once and unlocks: unlimited saved Wi-Fi passwords (3 free), your own QR colour and style (5 palettes, 2 of them gradients), unlimited ad-free speed tests (5 a day free, plus one more per ad), router default passwords for every brand, custom device names in Scan, the full 50-scan history (last 3 free), and 50 network health sessions with trend charts. No subscription, no monthly fee.

Wi-Fi Share has no cloud sync of its own, so it depends on your phone's system backup: a new iPhone restored from iCloud Backup brings your Wi-Fi entries and passwords with it; an Android phone restored from Google backup brings your other records, but Wi-Fi passwords are deliberately left out (they're encrypted with a key that exists only on the old phone). If you didn't restore from a backup, or the passwords didn't come over, open the network's QR code on the old phone and scan it with "Scan Wi-Fi QR" in Wi-Fi Share on the new one — it goes straight into the new phone's vault — or type it in again. For Premium, sign in to the same Apple ID or Google account on the new phone and tap Restore Purchases. Deleting the app clears everything on Android; on iPhone the system's encrypted vault may keep the data, so it can reappear after reinstalling. To be sure it is gone, delete the entries inside the app first, then remove the app.

No. Apple ID manages the iPhone purchase; Google account manages the Android purchase. They do not cross-license.

This is an iOS limit, not a bug. Apple only lets carrier-level apps read the list of nearby Wi-Fi networks — ordinary apps cannot. Android has also tightened similar permissions since 8.0. The right way is to have the other person scan the QR code you generated with their camera; you never need a list of nearby hotspots.

Three common reasons: (1) the device has AP Isolation / Client Isolation turned on, so the router walls off devices on the same subnet from each other; (2) the device is on a guest Wi-Fi, which is a different subnet from your phone; (3) on iPhone, apps can only see a short list of registered device services (about 15 kinds, such as AirPlay, HomeKit and printers) — anything outside that list stays invisible. Android has no such restriction.

Free gives you 5 speed tests per day. Once the quota is gone, you see an optional "watch an ad to earn one more" prompt — you can also just wait until midnight for the daily reset. The ad is a 5-second forced rewarded ad; quitting halfway does not consume the quota or run a test. Premium buyout NT$30 removes ads entirely and unlocks unlimited tests. Core QR sharing and all 18 tools are ad-free; ads only ever appear in the single "free user over 5 daily speed tests" scenario.

A regular speed test only tells you "X Mbps download," but the real cause might be DNS, Wi-Fi signal, IPv6 config or the ISP. This tool runs DNS resolution + Ping + IPv6 connectivity in one go and sorts the result into 6 conclusions: slow DNS, weak Wi-Fi signal, slow ISP line, broken IPv6 config, Wi-Fi-only interference, or all clear. Each conclusion comes with concrete next steps (switch DNS, switch band, contact ISP, etc.) — not just a single number.

WoL sends a wake-up signal across your local network to start a device that is switched off but still has power to its network port (typical use: remote-wake NAS, home server, desktop PC). Requirements: (1) the target device's motherboard / network card supports WoL and it is enabled in BIOS; (2) the device is on wired Ethernet (most Wi-Fi cards do not support WoL); (3) your phone and the target are on the same subnet. The app works out where to send the signal; just enter the target's MAC address. It does not support waking devices over the internet (that needs port forwarding set up on your router, out of the app's scope).

Enter any HTTPS site address to see its certificate's issuer (CA), validity period, SHA-1 / SHA-256 fingerprints and SAN (the other domain names it covers). It deliberately shows expired, self-signed and untrusted certificates too — a normal browser would block them without letting you look. This is "inspecting", not "trusting": the app never uses that certificate to connect to anything. Handy for checking a company's self-signed certificate, finding out why a certificate stopped working, or learning how certificates work.

Common scenarios that go past 3: (1) the home router has a separate 2.4G and 5G SSID (default on many older routers); (2) you keep a guest Wi-Fi; (3) NAS or printer brought its own IoT SSID; (4) you also stored your parents' house, the office, or a regular café. A normal household easily hits 2–3. Premium (NT$30) unlocks unlimited entries, plus your own QR colours and styles, unlimited ad-free speed tests and router default password lookup — one-time buyout, no further charges.

Yes, fully. Wi-Fi Share has no servers of its own and no analytics tools. Tools that need outside data ask public lookup services directly from your phone: DNS speed comparison checks Cloudflare / Google / Quad9's public services; public-IP lookup uses ipapi.co / ipinfo and similar public services (if one fails, it moves on to the next); Whois goes through rdap.org; the TLS inspector connects straight to the site you are checking. Every lookup goes directly from your phone to that service — we are never in the middle, because we have no servers.