# C.SIGN vs SSL Certificate Checker

The clearest difference is iOS requirement: C.SIGN at 13.0 against SSL Certificate Checker's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

C.SIGN ships an update every 2 weeks, SSL Certificate Checker monthly. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | C.SIGN | SSL Certificate Checker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ssl-certificate-checker/id6760943213/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | — | Free |
| Size | 162 MB | 31 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CMC Technology and Solution Company Limited](https://appshunter.io/developer/1498575851) | [Yuan-Yi Chang](https://appshunter.io/developer/784363421) |

## What reviewers say

### C.SIGN

[App page](https://appshunter.io/ios/app/csign/id6443462181)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### SSL Certificate Checker

[App page](https://appshunter.io/ios/app/ssl-certificate-checker/id6760943213)

Monitor the health of SSL/TLS certificates for websites and services. Quickly check expiry dates, status, and security configurations. Designed for a simple daily workflow of scanning, reviewing risks, and taking action.

**Highlights:** Monitor SSL/TLS certificate health, Check expiry date and days left, Classify certificate status (OK, Expiring, Expired, Failed), View issuer, subject, and SAN details, Inspect negotiated TLS protocol and cipher suite, Perform single target or full list scans, Store saved targets and results locally

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is C.SIGN free?

C.SIGN is free to download, with no in-app purchases.

### Is SSL Certificate Checker free?

SSL Certificate Checker is free to download, with no in-app purchases.

### Do C.SIGN or SSL Certificate Checker have ads?

Neither C.SIGN nor SSL Certificate Checker shows ads.

### Which is updated more often, C.SIGN or SSL Certificate Checker?

C.SIGN ships an update every 2 weeks, and SSL Certificate Checker monthly. Most recently, C.SIGN was updated on November 3, 2026 and SSL Certificate Checker on November 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*