Flash Cards: Math
Harken
Coursera
Pitch Deck Hunt
Jot
Duolingo
Productivity Power Tools
Decks is a study application designed to keep all your stuff in one place, instead of having an app for flashcards, another for notes, and one to watch tutorials, create a deck and keep everything organized there.

Decode and verify SSL/TLS certificates online. Extract X.509 details including issuer, validity, SAN, and fingerprint. Fast, secure, and browser-based.

Which is more popular?
Cert Decoder might be a bit more popular than Decks. We know about 1 link to it since March 2021 and only 1 link to Decks.
Website, pricing, platforms and company facts side by side.
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Decks
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| Website | decksapp.com | certdecoder.com |
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In their own words, as submitted to SaaSHub.

No description of Decks yet.
Cert Decoder is a free online tool that helps you decode X.509 SSL/TLS certificates in PEM format. It instantly shows important information like the issuer, expiry date, SAN entries, and fingerprint. All data is processed locally in your browser, so nothing is ever sent or stored elsewhere.
What each product offers, as listed by its team.

Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.

No analysis of Decks yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Some decks I didn't review (and other stuff)
No Cert Decoder videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing Decks and Cert Decoder.
Cert Decoder's answer:
I built certdecoder.com over the weekend for my own needs. Sometimes in my work, I need to verify and check certificate details.
Cert Decoder's answer:
certdecoder.com was built using just JavaScript and HTML—simple, fast, and with all processing happening locally in your browser, so no certificate data is sent to any server
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
Cert Decoder's answer:
Simple, fast, and reliable. Some similar tools can’t even decode basic certificates. I rigorously tested my tool with many real-world certificates and covered several edge cases where competitors fall short.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
Share your experience with using Decks and Cert Decoder. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

I built decks because I found learning to be a fragmented experience. I do a lot of my learning through watching tutorials, taking notes, reading blogs and books, and what I found was that I would have my stuff all over the place. My... Source: almost 5 years ago
Why? Because I built certdecoder.com and couldn’t find a decent place to submit it. So I said screw it — I’ll build my own. With blackjack and hookers. - Source: dev.to / over 1 year ago
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Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
Compare Duolingo to Decks or Cert Decoder: