Online Ruler vs BaZi Calculator

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 BaZi Calculator
Detail	Online Ruler	BaZi Calculator
What it does	Measure anything on your screen with pixel-perfect accuracy	Free online Four Pillars birth chart and destiny analysis
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Free	Freemium
Pricing	Not given	Free: Core BaZi chart generation. Plus: $9.90/month with 600 credits monthly. Pro: $19.90/month with 1,800 credits monthly. 100 credits unlock one report topic; 500 credits unlock one complete report. One-time credits valid for 365 days.
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	Four Pillars Chart Generation with Day Master analysis Five Elements Analysis Ten Gods Interpretation Daily Fortune readings based on cosmic alignments Love compatibility analysis with relationship dynamics BaZi Agent for personalized question-based guidance 10-year Luck Pillars showing life cycles Chinese Almanac with auspicious activities Flying Stars feng shui analysis Qi Men Dun Jia imperial divination tool
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	Free core chart with no account required Precise astronomical algorithms for accurate chart generation Available in English and Chinese with culturally adapted interpretations Privacy-first design with data encryption and no personal information storage
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	4 +3 (up) since last check	29 no change since last check
Trust Flow (Majestic)	0	5
Citation Flow (Majestic)	17	16
Referring domains (Majestic)	4	41

4 details filled in for both companies.

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