
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.

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
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 | countbusinessdays.com | devdocs.io |
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DevDocs - An API Documentation Browser
How often each product is chosen within a category, 0–100% relative to the other.


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


Tracking CountBusinessDays since Aug 2026.
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
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