Opportunities › Android VPN client application development › Proposed app
Knotbox
Share and manage proxy configs and subscriptions, encrypted, in one place
- Score
- 34
- confidence 41
- Evidence
- 7
- items on the page
- Rivals
- 3
- named in sources
- First version
- 35 d
- estimate
- Type
- Mobile app
- PWA: installs on iPhone and Android
- Market since
- 2015
- Established market · AI estimate
ScreensConcept
Mobile app: Android users manage and connect with proxy configs on phones for on-the-go internet access; quick selection and connection happen away from a desk. Sample screens on a phone, in the proposed brand. Their numbers are sample data.
Vault
14 configs
- VLESS · RealityHealthy
- Trojan · HomeHealthy
- Xray · BackupSlow
- V2Ray · OldUnreachable
- Subscriptions3
About this appAI proposal
Knotbox is a web app for people who run proxy clients on Android with V2Ray, VLESS, Trojan or Xray configs. It keeps configs and subscription links in one encrypted vault, tracks traffic, and lets you pass a config to someone without pasting it into a chat in plain text.
It does not replace your VPN client. A browser app cannot open a system VPN tunnel on Android, so Knotbox works next to the client you already use: import links, check them, share them, and hand the right one back with a tap.
It targets what the material describes: manual, unencrypted sharing and scattered subscription handling. Smart Connect suggestions and announcements are proposals to test.
- Tagline
- Your configs, sealed and shared on your terms.
- Voice
- CalmPlainCareful
- Why this name
- A knot holds things tight and a box keeps them closed. Together they suggest a secured bundle of links, which is what the app handles. Two plain words, easy to say.
In the first version
Members say which features they would use. It tells PWAS what people want; it changes no score.
Encrypted config vault
Store configs and subscription links encrypted on your device with a passphrase. The server only holds ciphertext it cannot read.
No member yet
Encrypted share links
Send a config as a link that opens only with a passcode and can expire after a set time or number of opens.
No member yet
Multi-protocol import
Paste or scan VLESS, Trojan, V2Ray and Xray links. Knotbox parses them, flags broken fields and groups them by source.
No member yet
Subscription and traffic tracker
See used and remaining data, renewal dates and last refresh per subscription, with a warning before a quota runs out.
No member yet
Brand identityAI proposal
Check the name against trademark registers before using it.
Palette
#1F2A2BDeep Slate · text and icon background#F4EFE6Paper · surface#1F6F6BHarbor Teal · primary#E07A3FEmber · accent#3B4F7ADusk Blue · data
Typography
Aa
Knotbox
ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789
Your configs, sealed and shared on your terms.
PricingAI proposal
The material gives no competitor prices. These tiers are a starting point to test, following the monetization idea of a subscription with a free tier.
Free
Free
- Vault for up to 5 configs
- Import and link check
- One subscription tracker
Plus
$3 a month
- Unlimited configs and subscriptions
- Encrypted share links with expiry
- Smart Connect suggestions
- Traffic warnings
Group
$8 a month
- Up to 10 members
- Shared config sets and revoke
- Announcements inbox
- Priority support
Would you pay Plus · $3 a month?
Your answer tells PWAS which prices people accept. It changes no score.
No answers yet.
What it could be worthEstimate
What a software business making this much sells for today, from real deals. Pick a monthly revenue.
If it makes
Worth about
$194,000
Sale range $132,000 to $263,000
$120,000 a year in revenue
From 87 software businesses listed and sold on Empire Flippers in the last year, revenue vetted by the broker: they sell for about 19× their monthly revenue, most between 13× and 26×.
Measured on profit, the middle deal is 32× monthly net profit: about 2.7 years of profit.
An estimate, not an offer or financial advice. A real price depends on profit, growth, churn, how much of the work is the owner's, and the buyer.
How it would growAI proposal
How the product would reach new customers through its own use, and how the first ones would be found. A plan to test, not a result.
- Built-in loop
- Shared outputs. Each encrypted share link opens a simple page where the recipient imports the config into their client. The page shows Knotbox and a prompt to save it to their own vault.
- Do they become customers?
- Recipients are real proxy users and may become customers, but many will open one link and leave. Test the share of recipients who create a vault and the share of those who upgrade.
- First customers
- Individuals who run a personal or family proxy server and share configs by chat with 3 to 10 other people, starting with admins of small groups.
- Where to reach them
- GitHub issues and discussions: Answer sharing and subscription questions on open-source client repositories and link a free vault tool where rules allow.
- Privacy-focused forums: Post a short guide on safer config sharing, with a free sample share link.
- Messaging groups for admins: Offer a free trial of Group to a few admins who already distribute configs.
- First milestone
- Twenty group admins create a vault and share links, and five of them pay for Group within 60 days.
Why people already pay for this
- Public claimMultiple proxy protocols (VLESS, Trojan, V2Ray, Xray) are actively used by consumers
- VerifiedGitHub repository gained 338 stars in 71 days
- Public claimAndroid VPN/proxy clients need modern architecture and UI implementation using current development frameworks
- Public claimUsers require encrypted configuration sharing capabilities for secure proxy setup distribution
- Public claim
Tech stack
Every proposal builds on the same PWA base, installable from the browser on any phone or computer. Dashed boxes are what this app adds.
- AppNext.js and TypeScript
- PWAManifest and service worker
- UITailwind CSS
- Data and authSupabase Postgres
- PaymentsStripe
- EmailResend
- HostingVercel
- This app · Client-side encryptionWeb Crypto API with passphrase-derived keysConfigs must be encrypted in the browser so the server stores only ciphertext.
- This app · Link health checksSmall edge function for reachability probesSmart Connect needs latency and reachability checks; browser-only tests are limited.
RisksAI inference
- PlatformA PWA cannot create a VPN tunnel on Android. Knotbox only works as a companion to other clients, and users who want one all-in-one app may not see the point.
- PlatformStores, payment providers and hosts may restrict apps tied to circumvention tools. Stripe or Vercel terms may limit this in some uses.
- RegulatoryCircumvention tools are restricted or illegal in some countries. Hosting share links and group data may create legal exposure for the team and users.
- TechnicalSmart Connect is limited in a browser. Probes from a server do not reflect the user's restricted network, so rankings could be wrong.
- CommercialFree open-source clients already cover import and subscriptions. Users may not pay for a companion, and the material shows only GitHub interest, not payment.
Everything marked AI proposal or AI inference was written by a model from the evidence on the opportunity page. The proposed name must be checked against trademark registers before it is used.