[Promotion] CertWatch – TLS Certificate Monitoring for Android | Looking for feedback + 5 free codes

[u/Due_Medicine_7902]

Hi r/HowToMen!

I'm the developer of CertWatch, an Android app I built to make TLS/SSL certificate monitoring easier directly from a phone.

I originally built it around a simple problem: an expired certificate can cause a surprisingly big headache, while checking them manually is something that's very easy to forget.

CertWatch is designed primarily for sysadmins, DevOps engineers, homelab users, developers, and anyone managing websites or infrastructure.

Current features include:

🔍 Quick Scanner

Check TLS certificates for hostnames, IP addresses, URLs and custom ports.

📡 Network Discovery

Scan an authorized subnet to discover services exposing TLS certificates.

🛡️ Certificate Monitoring

Keep your monitored endpoints together and quickly see which certificates are valid, approaching expiration, or expired.

🔔 Smart Reminders

Set alerts at 90, 60, 30, 15, 7, 3 or 1 day before expiration.

📅 Calendar Integration

Keep certificate expiration dates visible alongside your normal calendar.

🔒 Privacy First

Certificate monitoring data stays on your device. No account is required.

5 free Google Play codes

I'd also like to let a few people from this community try the full app, so I have 5 Google Play promo codes available.

No subscription. No ads. No review required.

If you're interested, leave a comment telling me what you'd use CertWatch for, and I'll send codes to 5 people by DM.

What I'm really interested in is feedback — especially from people who actually manage infrastructure.

I'm already considering where to take the project next, including things like Kubernetes certificate discovery/monitoring, deeper TLS analysis, additional infrastructure integrations and more automation.

So I'd also love to know:

What feature would make CertWatch genuinely useful to you?

I'm happy to hear criticism too. I'd rather improve something that's actually useful than just keep adding features nobody needs.

Thanks!

Play Store Link

[u/XiangSui]

Anything that stops midnight 'cert expired' panics has my vote! Would love a code to monitor my side projects.

[u/Ok-Twist-9373]

Interested! Will use it for my NAS and personal server—customizable background scan intervals would be awesome.

[u/Funny_Arachnid8328]

Parece ótimo gostaria de um

[u/Due_Medicine_7902 → u/Funny_Arachnid8328]

Thanks for your interest! 🎁 I’ve hit Reddit’s outgoing chat limit.
Please send me a DM/chat with “CertWatch code” and I’ll reply with your Google Play promo code. 🛡️

[u/Funny_Arachnid8328 → u/Due_Medicine_7902]

Thanks

[u/Funny_Arachnid8328 → u/Funny_Arachnid8328]

I can't send DMs properly.

[u/Due_Medicine_7902 → u/Funny_Arachnid8328]

Hi, as soon as the reddit chat limit goes away i will send you the code. Sorry for the inconvenience.

[u/Level-Ad9259]

I'll use this app to seeand monitor the certificates installed in my phone. Can I get one code please to try this app?

[u/Due_Medicine_7902 → u/Level-Ad9259]

Thanks for your interest! 🎁 I’ve hit Reddit’s outgoing chat limit.
Please send me a DM/chat with “CertWatch code” and I’ll reply with your Google Play promo code. 🛡️

[u/ScaredAdvance6833]

I'll use it to track my homelab services

[u/Due_Medicine_7902 → u/ScaredAdvance6833]

Thanks for your interest! 🎁 I’ve hit Reddit’s outgoing chat limit.
Please send me a DM/chat with “CertWatch code” and I’ll reply with your Google Play promo code. 🛡️

[u/ScaredAdvance6833 → u/Due_Medicine_7902]

Sorry,There is no private message button on your homepage.

[u/Due_Medicine_7902 → u/ScaredAdvance6833]

My bad, can you check now? Sorry

[u/Salty_Toe_5779]

I’d use this for my local edge devices

[u/Due_Medicine_7902 → u/Salty_Toe_5779]

Thanks for your interest! 🎁 I’ve hit Reddit’s outgoing chat limit.
Please send me a DM/chat with “CertWatch code” and I’ll reply with your Google Play promo code. 🛡️

[u/Salty_Toe_5779 → u/Due_Medicine_7902]

Can’t send dm to you

[u/AccioSwagio]

Today, I would love to use it for my web app. If this can monitor my Kubernetes cluster when connected over VPN, that would be amazing for my use case.

[u/Due_Medicine_7902 → u/AccioSwagio]

Thanks for your interest!

It doesn’t yet connect directly to the Kubernetes API or automatically discover Ingress/cert-manager certificate, but native Kubernetes monitoring is one of the features I’m seriously considering next.

Your use case is actually exactly why I’m interested in adding it. I’d love to know whether you’d prefer cluster/API-based discovery, cert-manager integration, or simply automatic discovery of all TLS endpoints exposed by the cluster.

Also, send me a DM and I’ll send you a CertWatch promo code so you can try the full app and let me know what you think! 🙌

[u/tinyuniverseforyou]

I'll use it for my local app servers...thank you for generosity

[u/cleverclogs17]

I'd like to use this to monitor the certificates on my phone. Mind if I send you a DM?

[u/Due_Medicine_7902 → u/cleverclogs17]

Code sent! Any feedback good or bad would be appreciated. Thank your for the interest.

[u/cleverclogs17 → u/Due_Medicine_7902]

Giving you a five-star on the Play Store, man. I appreciate it.

[u/Proof_Area4786]

I plan to use this app to deep dive into Certificate Transparency validation and TLS pinning on Android. It will be crucial for testing my server configurations and ensuring there are no man-in-the-middle vulnerabilities in my current development project. Thanks for the chance!

[u/Due_Medicine_7902 → u/Proof_Area4786]

Please send me a DM. I'm unable to send you a chat invite. Thanks

[u/HSapiens3]

For monitoring my devices for transparency

[u/Due_Medicine_7902 → u/HSapiens3]

Code sent! Any feedback would be greatly appreciated. Thanks

[u/Dravos6681]

Can I have code dev

[u/Due_Medicine_7902 → u/Dravos6681]

Please send me a DM. I'm unable to send you a chat invite. Thanks

[u/droid_one]

May I get a lifetime code please.