CertsCheck vs CertTool
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CertsCheck
Easily inspect the details of TLS/SSL certificates directly from your browser. This tool helps you understand certificate information, including those from Let's Encrypt, without needing to be a security expert.
- Check TLS/SSL certificate contents
- Inspect certificate details via URL
- Share Extension for browsers
- Understand Let's Encrypt certificates
- Premium subscription for advanced features
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CertsCheck is an app that allows you to easily check the contents of TLS/SSL certificates. You can also input the URL and inspect the certificate's details directly using a Share Extension from Safari or your preferred browser app. The majority of sites using Let's Encrypt are not necessarily fraudulent sites!! ******************** CertsCheck Premium - Monthly $1.99 - Yearly $19.99 ******************** Terms of service: https://github.com/nnsnodnb/ssl-certificates-check-ios/wiki/Terms Privacy Policy: https://github.com/nnsnodnb/ssl-certificates-check-ios/wiki/Privacy-Policy Notation based on Japan's Act on Specified Commercial Transactions: https://nnsnodnb.moe/commercial-law/
CertTool
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If you want to know a little bit about a X.509 certificate CertTool has you covered. Just select a file in PEM or DER format that contains the certificate and it will show you some details. And if you just want to share the certificate to the app, you can do that as well.
Screenshots
Verdict
The clearest difference is in-app purchases: CertTool at none against CertsCheck's 3. CertTool also leads on iOS requirement (16.6 vs 18.0). CertsCheck's advantage is update cadence (monthly vs every 2 months). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. CertsCheck sells 3 in-app purchases, starting at $1.99 per month. CertTool asks for nothing beyond the download.
CertsCheck ships an update monthly, CertTool every 2 months. The most recent releases landed on September 16, 2026 and September 23, 2026 respectively.
| Parameter | CertsCheck | CertTool |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 36 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuya Asamura | Tim Wilbrink |
In-app purchases
CertsCheck
- Premium (Monthly)7 Days trial$1.991 Month
- Premium (Yearly)1 Month trial$19.991 Year
- Buy developer a coffee$1.99
CertTool
No in-app purchases
