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Online Ruler vs Time.Now CLI

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Online Ruler compared with Time.Now CLI
DetailOnline Ruler logo Online RulerTime.Now CLI logo Time.Now CLI
What it doesMeasure anything on your screen with pixel-perfect accuracy Dependency-free command-line tool for querying world time, timezone search, and IP-based time lookup
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Free
PricingNot given Not given
Key features
  • Smart Auto-Detect identifies your device from a database of 100+ profiles
  • Three calibration methods: auto-detect, screen diagonal, and credit card
  • Place rulers on any edge of the screen in any combination
  • Click-to-measure distances in any direction
  • Live cursor position tracking
  • Dark mode with automatic system preference detection
  • Support for four measurement units: cm, mm, inches, and pixels
  • Structured JSON output for automation
  • Configurable API endpoint support
  • No external dependencies
  • Easy to audit source code
What makes it different
  • No installation required—runs entirely in your web browser
  • Achieves near pixel-perfect accuracy typically within 0.5mm for well-calibrated screens
  • Completely free with no ads, account, or limitations
  • Calibration saved locally so no need to recalibrate on each visit
  • Works on tablets and mobile devices with touchscreen support
  • Dependency-free - uses only Python standard library
  • Lightweight and easy to audit
  • Structured output matches Time.Now API schema
  • Easy installation via curl
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)4 +3 (up) since last check77 no change since last check
Trust Flow (Majestic)045
Citation Flow (Majestic)1762
Referring domains (Majestic)42229

4 details filled in for both companies.

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