자주 묻는 질문 · Wi-Fi 공유

Question 1

계정을 만들거나 로그인이 필요한가요?

Accepted Answer

아니요. Wi-Fi 공유는 계정 시스템이 없어 앱을 열면 바로 사용할 수 있습니다. 이메일, 이름, 전화번호, 생년월일을 요구하지 않습니다.

Question 2

Wi-Fi 비밀번호는 어디에 저장되나요? 클라우드에 업로드되나요?

Accepted Answer

비밀번호는 휴대폰의 암호화 보관함에 저장됩니다. 완전 로컬이며 자체 서버에 전송되거나 클라우드에 업로드되지 않습니다.

Question 3

왜 iPhone에서 Wi-Fi 이름 (SSID) 필드가 비어 있을 때가 있나요?

Accepted Answer

iOS 플랫폼 제한입니다. 일부 상황에서 시스템이 현재 Wi-Fi 이름을 앱에 전달하지 않으므로, 이 경우 SSID를 직접 입력해 QR 코드를 생성해 주세요.

Question 4

"로컬 네트워크 접근" 권한은 무엇에 사용되나요? 위치 정보와 관련이 있나요?

Accepted Answer

LAN 레이더가 같은 네트워크의 기기 (공유기, NAS, TV, 프린터) 를 스캔하는 데 사용됩니다. 위치 정보가 아니며 사진이나 연락처를 읽지 않습니다.

Question 5

무료 버전과 Pro의 차이는 무엇이고 얼마인가요?

Accepted Answer

무료 버전은 핵심 기능을 모두 열어 두며 QR 공유는 영구 무료입니다. Pro는 주로 더 많은 저장 용량과 고급 도구를 잠금 해제하며 일회성 구매 NT$30, 구독이나 월 요금이 없습니다.

Question 6

휴대폰을 바꾸거나 앱을 재설치하면 비밀번호가 따라오나요?

Accepted Answer

데이터는 기기 로컬을 기준으로 합니다. 앱을 삭제하면 저장된 Wi-Fi 데이터도 함께 사라집니다. 휴대폰을 바꾸기 전에 필요한 정보는 직접 백업하세요.

Question 7

NT$30 한 번으로 iPhone과 Android를 동시에 쓸 수 있나요?

Accepted Answer

아니요. iPhone 버전은 Apple ID, Android 버전은 Google 계정으로 구매 기록이 관리되며 두 플랫폼은 공유되지 않습니다.

Question 8

Why can't iPhone show the list of nearby Wi-Fi networks?

Accepted Answer

This is a hard iOS platform limit, not a bug. Apple does not grant the `NEHotspotHelper` entitlement to ordinary apps — only carrier-grade apps get the nearby Wi-Fi list. Android has tightened similar permissions since 8.0. The correct flow is to have the other person scan the QR code you generated with their camera; you never need to enumerate nearby hotspots.

Question 9

Why does the LAN radar miss some of my devices?

Accepted Answer

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) iOS mDNS only sees services whitelisted in `NSBonjourServices` (15 entries like `_airplay._tcp`, `_homekit._tcp`, `_printer._tcp`) — anything outside the whitelist stays invisible. Android has no such restriction.

Question 10

Do I have to watch an ad after the 5 free speed tests per day?

Accepted Answer

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. Pro 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.

Question 11

What does the "slow-network root-cause analysis" actually test? How is it different from a normal speed test?

Accepted Answer

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 classifies the result into 6 verdicts: slow DNS, weak Wi-Fi signal, slow ISP line, broken IPv6 config, Wi-Fi-only interference, or all clear. Each verdict comes with concrete next steps (switch DNS, switch band, contact ISP, etc.) — not just a single number.

Question 12

How does Wake-on-LAN work? What setups does it support?

Accepted Answer

WoL sends a UDP-broadcast magic packet to wake a device on the same subnet whose LAN port is still powered (typical use: remote-wake NAS, home server, desktop PC). Requirements: (1) the target device's motherboard / NIC 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 auto-detects the broadcast address; just enter the target MAC. It does not support waking devices over the internet (that needs router port forwarding, out of the app's scope).

Question 13

What does the TLS certificate inspector show? Why can it still display "untrusted" certs?

Accepted Answer

Enter any HTTPS hostname to inspect the issuer (CA), validity period, SHA-1 / SHA-256 fingerprint and SAN (Subject Alternative Names). Under the hood it uses `SecureSocket.connect` with `onBadCertificate: (cert) => true`, deliberately allowing you to view expired, self-signed and untrusted certs (a normal browser would refuse to show them). This is "inspection," not "trust" — the app never builds a real connection on that cert. Useful for inspecting a company self-signed cert, diagnosing expired certs, or learning PKI internals.

Question 14

Why does Free cap the password vault at 3 entries? I only have one home Wi-Fi — would I ever hit that?

Accepted Answer

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. Pro NT$30 unlocks unlimited entries + QR customization (gradient, centered logo, rounded corners) + batch PDF printing (for Airbnb / café wall posters), one-time buyout — no further charges.

Question 15

Is the app really server-less? How do the tools actually work?

Accepted Answer

Yes, fully. Wi-Fi 分享 has zero backend, zero analytics SDK, zero tracking. Tools that need external data call public lookup services directly: DNS speed comparison uses Cloudflare / Google / Quad9 public DoH endpoints; public-IP lookup uses ipapi.co / ipinfo and similar public APIs (with three-endpoint fallback); Whois uses rdap.org bootstrap; the TLS inspector TCP-connects straight to the target host. Every HTTPS call goes directly from your phone to the third-party service — our servers are never in the middle, because there are no servers.