iOS apps don't have a "Proceed anyway" button on cert errors.
When the backend SSL breaks, your production iOS users see a network error screen and the web admin keeps working perfectly.
React Native agencies shipping to the App Store and Play Store deal with iOS NSAppTransportSecurity and Android Network Security Config refusing to load any resource over a broken HTTPS connection, APNs .p12 push certificates that expire annually and silently stop delivering pushes, and Universal Links AASA file SSL failures that degrade deep links to Safari opens. Merlonix monitors SSL and DNS so production iOS users don't hit a network error screen before you know the cert expired.
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- Check cadence (Agency)
- 5 min
- SSL pre-expiry alert
- 30 days
- Independent DNS resolvers
- 3
- Vendors watched
- 11
Where React Native agencies get caught out
Three failure modes specific to React Native deployments shipping to the App Store and Play Store, with backend APIs behind managed platforms or Cloudflare proxies.
React Native agencies deal with iOS NSAppTransportSecurity and Android Network Security Config refusing to load any resource over a broken HTTPS connection (no "Proceed anyway" button on a phone — production users see a network error screen while the web admin keeps working), APNs .p12 push certificates that expire annually and silently stop delivering pushes with no logged error, and Universal Links AASA files that degrade to Safari opens when the cert breaks — invisibly tanking app-open conversion rates from email and SMS links.
iOS NSAppTransportSecurity (and Android Network Security Config) refuse to load any resource over a broken HTTPS connection — unlike a browser there is no "Proceed anyway" button, the connection silently fails and the app shows a network error screen. Production iOS users see a broken app while the agency's web admin running against the same backend works fine in Chrome
A React Native agency operates a fitness app that calls api.client.com from iOS and Android. The Render-managed cert at api.client.com fails to renew because the agency recently turned on Cloudflare in front for caching. Web admin (built in React, called from a browser) keeps working — Chrome accepts Cloudflare's edge cert. The iOS production app rejects the broken end-to-end TLS handshake under NSAppTransportSecurity. App Store users see "We're having trouble connecting" and rate the app 1-star
A React Native agency builds a fitness app for a client. The backend API at api.client.com is hosted on Render with managed Let's Encrypt SSL. The mobile app uses NSAppTransportSecurity in default-strict mode (no exceptions for the API domain) — Apple's default since iOS 9. Six months in, the client adds Cloudflare in front of api.client.com to cache static asset responses. Render's cert renewal cycle attempts ACME http-01 validation 30 days before expiry; Cloudflare's edge proxy intercepts the validation challenge and Render's cert renewal fails silently. The cert expires. The web admin dashboard built in React continues working perfectly because Chrome accepts Cloudflare's universal edge cert covering api.client.com. The mobile app starts failing all API calls — the iOS NSAppTransportSecurity layer blocks the connection because the end-to-end cert chain Render is presenting is expired. Production iOS users get a "We're having trouble connecting" error screen. The agency receives 1-star App Store reviews referencing the network error within 18 hours. The agency engineer can't reproduce the issue in Chrome and assumes it's a React Native networking bug — three days of debugging RN code before realizing the issue is the underlying Render cert.
APNs push notification certificates in legacy .p12 format expire annually and must be manually renewed in the Apple Developer portal — when the cert expires, push delivery silently stops. APNs continues accepting the connection but rejects the auth challenge; no error is logged on the backend that sends the push, no error appears in the React Native app, the only signal is users complaining "I'm not getting notifications anymore"
A React Native agency uses an APNs .p12 cert (issued 2025-02-14, expires 2026-02-14) for production push notifications on a client e-commerce app. The agency engineer who set up the cert left in 2025-Q3. The 2026-02-14 expiry passes silently. Push notifications stop delivering. The backend continues sending push payloads to APNs without any logged error because APNs accepts the TLS connection at the network layer and rejects the auth at the application layer in a way that some libraries don't surface
A React Native agency operates a client e-commerce app where push notifications drive 30% of repeat-engagement traffic. The push system uses an APNs .p12 cert created on 2025-02-14 by an engineer who has since left the agency. The cert expires on 2026-02-14. The expiry comes and goes. The backend service that calls APNs continues to send push payloads — the underlying TLS connection to api.push.apple.com succeeds because the .p12 client cert is presented at the TLS handshake layer and APNs accepts the connection but rejects the per-message auth at the application layer. Some node-apn versions surface this as a soft error log line; others swallow it entirely. The agency's monitoring shows backend health green. App Store reviews start mentioning "I stopped getting order notifications." The client's repeat-engagement metrics drop 18% over two weeks before the agency engineer correlates the timing with the cert expiry date in the Apple Developer portal. Re-issuing the cert and rotating it through the backend takes 90 minutes including App Store Connect updates; the lost engagement window is unrecoverable.
Universal Links require an AASA file (apple-app-site-association) served at https://app.client.com/.well-known/apple-app-site-association with a valid HTTPS cert and Content-Type: application/json — when the cert breaks, iOS silently stops opening the app on link taps and degrades to opening Safari instead, with no error visible to the user
A React Native agency runs a client B2C app where the marketing team sends transactional and promotional emails containing Universal Links pointing at app.client.com paths. The Cloudflare-managed cert at app.client.com expires after a domain transfer breaks the auto-renewal. iOS link taps silently start opening Safari at app.client.com instead of opening the React Native app. Email click-through still "works" because Safari opens the URL — but the app-open conversion rate drops to zero
A React Native agency operates a client B2C app where Universal Links are configured for the entitlement applinks:app.client.com. The AASA file is hosted at https://app.client.com/.well-known/apple-app-site-association behind a Cloudflare-managed cert. The marketing team sends weekly transactional emails containing https://app.client.com/order/<id> links that should open the app. After a routine domain transfer between registrars, Cloudflare's cert auto-renewal stops working because the registrar's NS records no longer point at Cloudflare's nameservers (the transfer migrated NS to the new registrar's default). The cert expires. iOS taps on the email Universal Link silently fall back to opening Safari at app.client.com — the page loads (the cert is bad but Safari shows the warning, the user clicks through, sees the order details in a web view) but the React Native app is never opened. Push-driven re-engagement events that depend on app-open continue to fire correctly because they use a different deep-link path that bypasses Universal Links. The agency's app-open analytics drop 40% over two weeks; the marketing team blames "weather" before the agency engineer notices the AASA URL returns a cert error in a curl check.
How it works
SSL and DNS monitoring for React Native agencies across iOS NSAppTransportSecurity-strict backend APIs, APNs push certificate expiry, and Universal Links AASA file SSL failures.
Merlonix monitors SSL expiry and CNAME integrity across every React Native-relevant subdomain — api.*, push.*, ota.*, and the Universal Links AASA host — and catches renewal failures caused by Cloudflare proxy interactions that break managed cert provisioning on Render or Fly.io (while the Cloudflare edge cert keeps the web admin working), Universal Links AASA host certs that lapsed after registrar NS changes, and OTA update host certs that break Expo Updates silently — before production iOS users hit a network error screen and the App Store fills with 1-star reviews citing the connection error.
01
Add React Native backend domains — api.*, push.*, ota.*, plus the AASA host (app.* or apex) — with DNS TXT record verification
Verify ownership with a DNS TXT record on the apex domain. All subdomains under that apex — api.*, push.*, ota.* (Expo Updates), plus the Universal Links AASA host serving /.well-known/apple-app-site-association — are added without additional verification. Monitoring every React Native backend subdomain plus the Universal Links host from a single apex registration ensures that mobile-only failure modes (backend cert breaking only the mobile app, AASA cert breaking only Universal Links) are caught alongside the marketing-site cert. Under two minutes per client.
02
CNAME and A record monitoring across managed mobile backend platforms (Render, Fly.io, Cloud Run, AWS App Runner) and Cloudflare proxy interactions
Three independent DNS resolvers check every CNAME delegation on every monitoring interval. When a client adds Cloudflare in front of api.client.com to cache static asset responses, the orange-cloud-on transition is logged immediately — alongside the cert renewal failure that follows 30 days later when the managed platform's ACME http-01 validation can't complete through Cloudflare's TLS termination. Catches the Cloudflare-proxy interaction that breaks Render and Fly.io managed certs, while the Cloudflare-issued universal edge cert keeps the web admin working perfectly so the agency only sees the failure on the mobile production app.
03
SSL monitoring 30 days before expiry across React Native backend API certs, Universal Links AASA host certs, OTA update host certs, and Expo EAS Build managed cert chains
Full SSL chain validation on every React Native-relevant subdomain — api.*, push.*, ota.*, plus the Universal Links AASA host. An expiry alert fires 30 days before the certificate expires — enough lead time to identify whether the failure is a Render or Fly.io managed cert broken by a Cloudflare proxy interaction, an AASA host cert that lapsed after a registrar NS change, or an OTA update host cert that breaks Expo Updates silently. Catches mobile-only cert failures before iOS production users see a network error screen and start posting 1-star App Store reviews referencing the connection error.
04
Vendor status for Apple Developer / APNs, Google Play Store / FCM, Firebase, plus typical React Native backend hosting providers to distinguish infrastructure incidents from app-side SSL and cert configuration failures
Merlonix monitors Apple Developer / APNs, Firebase / FCM, Google Play Store, AWS, Google Cloud, Render, Fly.io, and Cloudflare status pages alongside client SSL and DNS. When an APNs regional incident causes push delivery delays across multiple client mobile apps simultaneously, you see the vendor event — not a cluster of individual push-delivery alerts that each require separate investigation to determine whether the root cause is an APNs regional outage, a Render cert broken by Cloudflare proxy, or a .p12 cert that quietly expired six weeks ago.
What the numbers mean for React Native agencies
Monitoring built for React Native agencies where one client product means an iOS app, an Android app, a backend API at api.*, an OTA update host at ota.*, and a Universal Links AASA file at app.* — each a separate SSL surface that fails differently across mobile and web.
React Native agencies managing iOS-strict NSAppTransportSecurity across multi-client backend deployments, APNs .p12 cert renewal cycles across legacy push integrations, and Universal Links AASA host certs across multi-domain client portfolios need monitoring that covers every mobile-touching subdomain — because a Cloudflare-proxy CNAME flip breaks the mobile app while the web admin keeps working, and the App Store fills with 1-star reviews referencing the network error before the agency knows the cert expired.
< 10 min
Time from DNS change to alert — catches the Cloudflare proxy flip that breaks Render and Fly.io managed cert renewal for React Native backends, registrar NS changes that orphan the Universal Links AASA host cert, and OTA update host CNAME flips that break Expo Updates silently
30 days
SSL expiry warning lead time — enough time to identify a Render or Fly.io cert broken by a Cloudflare proxy interaction, a Universal Links AASA host cert that lapsed after a registrar NS change, or an APNs .p12 cert quietly approaching its annual expiry, and correct it before production iOS users hit a network error screen
11 vendors
Upstream services monitored — Apple Developer / APNs, Firebase / FCM, Google Play Store, AWS, Google Cloud, Render, Fly.io, and Cloudflare included to distinguish provider outages from React Native backend SSL failures requiring cert reconfiguration
200 assets
Maximum monitored domains on the Agency plan — covers React Native backend API hosts, push services, OTA update hosts, and Universal Links AASA hosts across a full React Native client portfolio
Pricing
Flat monthly fee. Every React Native backend subdomain and Universal Links AASA host included.
No per-subdomain charges. No per-mobile-app fees. Pick the tier that fits your React Native client and backend count and monitor every api.*, push.*, ota.*, and Universal Links AASA host without billing surprises.
Starter
For individual React Native developers managing a small client portfolio with single-backend mobile apps.
$29/ month
- 10 monitored assets
- 1 seat
- 15-min check cadence
- SSL + DNS + vendor monitoring
- Email + Slack alerts
Team
For React Native agencies managing multi-client mobile deployments with separate api.*, push.*, and OTA update hosts.
$79/ month
- 50 monitored assets
- 5 seats
- 10-min check cadence
- SSL + DNS + vendor monitoring
- Email + Slack alerts
Agency
For agencies with a full React Native client roster including Universal Links AASA hosts and per-tenant backend subdomains.
$199/ month
- 200 monitored assets
- 15 seats
- 5-min check cadence
- SSL + DNS + vendor monitoring
- Email + Slack alerts
Know when a React Native backend cert is about to fail under NSAppTransportSecurity-strict iOS production builds.
Add your first React Native client domain in under two minutes. Backend api.*, push.*, ota.*, and Universal Links AASA host across every client mobile app are monitored from the same dashboard. 14-day trial, no card required.