Online Ruler vs TangoEra

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 TangoEra
Detail	Online Ruler	TangoEra
What it does	Free on-screen measuring tools that run in your browser	Written BaZi readings: reflective, not fatalistic
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	HK
Pricing model	Free	Paid
Pricing	Not given	Written Reading: $49 USD one-time payment, delivered within 48 hours. Live Session: $249 (not yet available, waitlist only). Companion: planned for 2027. Free Element Check available.
Key features	Actual-size ruler in cm, mm and inches Bank-card and screen-diagonal calibration Top, left and right rulers with drag-to-measure readout Full-screen mode and browser-zoom warning Image measurement tool Length unit converter Touch dragging support for phones and tablets Local storage of calibration without server uploads	Four-pillars chart calculation from birth time and location Day Master element identification Ten Gods analysis showing chart structure Element balance assessment Three-year cycle map with themes 2,000-word PDF written report 14 days of email follow-up questions Solar-term calendar method Free Element Check for Day Master only 48-hour delivery guarantee
What makes it different	Calibration step compensates for browsers' inability to detect physical display size ISO/IEC 7810 ID-1 standard bank card calibration ensures reproducible accuracy All calculations run locally in your browser with no data sent to servers Works on any device with a browser and JavaScript enabled Content follows standards-based principles with no invented precision or fake reviews	Explicitly non-fatalistic interpretation: describes tendencies and cycles, not predictions or verdicts Every interpretation names the chart characters it comes from for verification Cultural and reflective approach avoiding fear or urgency No supernatural claims or remedies to purchase 30-day money-back guarantee with rewrite option
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)	Not checked yet no change since last check	12 no change since last check
Trust Flow (Majestic)	2	4
Citation Flow (Majestic)	18	19
Referring domains (Majestic)	10	6

4 details filled in for both companies.

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