# LinkLint — Find App Link Setup Issues

> Find App Link Setup Issues (iPhone/iPad app by Shanghai Fengcong Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/linklint/id6805782160 (this page in markdown: same URL + `.md`)
- Developer: [Shanghai Fengcong Technology Co., Ltd.](https://appshunter.io/developer/1640023165)
- Category: Developer Tools, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 5 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-09-18
- Data updated: 2026-10-11

## What is LinkLint?

When a web link does not open an app as expected, the problem may be in the website association file, app identity, URL rules, or network response. LinkLint brings those checks into one clear report. Enter a domain or issuer to see what passed, what needs attention, and the evidence behind every result.

Built for release checks and troubleshooting

• Check whether AASA is reachable and whether its app declarations and Universal Links rules are valid
• Review app identifiers, certificate fingerprints, and website-declared URL matching rules in assetlinks.json
• Test URL paths, queries, fragments, and exclusions with a step-by-step matching trace
• Inspect issuers, endpoints, capabilities, and security settings in OIDC Discovery and OAuth authorization server metadata

Turn each result into a useful next step

Every issue explains what happened, why it matters, likely causes, and what to change. PASS, WARNING, FAIL, NOT CONFIGURED, and UNKNOWN make it easy to separate a valid setup from an optimization, an error, a missing configuration, or insufficient evidence.

Reports preserve HTTP status, headers, manual redirects, DNS resolution, the actual connection address, TLS details, certificate summaries, the complete response body, and SHA-256. When you need to go deeper, the original evidence is already there.

Local files and scan history

Import AASA, assetlinks.json, OIDC, or OAuth metadata from Files and validate it on your device. The free version keeps the five most recent scans for quick review.

Free inspections, optional Pro upgrade

The free version includes all four protocol inspections, diagnostics, network evidence, local file validation, and URL rule testing. One LinkLint Pro purchase adds regional App Store availability checks, platform association insights, semantic comparisons between scans of the same target, and unlimited local history.

Local by design

No account is required. Scan reports and history stay on your device and are not automatically uploaded or synced. App Store information helps identify declared apps but never changes the protocol result.

Important: A passing website-side check does not guarantee that a link will open an app on a real device. Final behavior also depends on app entitlements or manifests, signing, installation state, system caches, user settings, and in-app routing.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| LinkLint Pro Lifetime | $2.99 | one-time |


## Is LinkLint safe?

Not enough ratings yet to assess LinkLint.

## Is LinkLint legit?

LinkLint appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for LinkLint is 70 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-09-18

No release notes.

## More apps by Shanghai Fengcong Technology Co., Ltd.

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- [TailScope](https://appshunter.io/ios/app/tailscope/id6802478511)

All apps by Shanghai Fengcong Technology Co., Ltd.: https://appshunter.io/developer/1640023165

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-11.*