
Zeal
Dash for macOS
Devhints
CSS-Tricks
CodePen
Carbon
Can I use
Open source API documentation browser with instant fuzzy search, offline mode, keyboard shortcuts, and more

Days Calculator
clocks.life
Date Calculator Pro
Day-Number
Working Days Calc
DateCalc.xyz
28 Days from Today
Free tools to calculate business or calendar days between dates, add/subtract days, invoice age & due dates, fiscal year remaining days, cascading deadlines, ISO week numbers, and more.

Which is more popular?
Based on our record, DevDocs seems to be more popular. It has been mentioned 132 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | devdocs.io | countbusinessdays.com |
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What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
No analysis of CountBusinessDays yet.
Walkthroughs and reviews on video.
DevDocs - An API Documentation Browser
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using DevDocs and CountBusinessDays. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


DevDocs (open source, free) is a local offline documentation viewer. There is a hosted version that can be used offline in a web browser. - Source: dev.to / 5 months ago
This isn't a new idea for developer tools. DevDocs, Zeal, and Dash have offered offline documentation browsing for years. What's new is applying this architecture to AI agents — giving your coding assistant the same offline, instant,... - Source: dev.to / 8 months ago
DevDocs the minimalist doc reader for when Stack Overflow doesn’t have the answer. - Source: dev.to / over 1 year ago
Tracking CountBusinessDays since Aug 2026.
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Dash is an API Documentation Browser and Code Snippet Manager. Dash searches offline documentation of 200+ APIs and stores snippets of code. You can also generate your own documentation sets.
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Free date and time calculator to add or subtract days, weeks, months, years, hours, or minutes from any date. Instantly find past and future dates.
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This date calculator helps to add or subtract days, weeks, months, and years to/from a given date for accurate time adjustments, planning, and managing events.
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