500 ToolBox vs PlainAstro

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

500 ToolBox compared with PlainAstro
Detail	500 ToolBox	PlainAstro
What it does	Free online tools for images, PDF, video, text and more	Free birth chart calculator and astrology explained in plain words
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	GB
Pricing model	Freemium	Freemium
Pricing	Website tools: free, no limits except fair daily limits on server-based tools. API: 50 free monthly credits plus 100 on the 1st of each month. Credit packs: Starter $5 (1,000 credits), Growth $25 (5,000 credits, 20% off), Scale $80 (25,000 credits).	Free birth chart calculator with no sign-up required. Full birth chart reading: $12. Personal 2027 astro calendar: $15.
Key features	Image compression and resizing PDF manipulation: merge, split, compress, convert to images Video compression and conversion AI background removal Developer tools: JSON formatting, regex testing, JWT decoding Text tools: word count, case conversion, diff checking QR code generation and customization Chrome extension with 50 tools Server API with 30 endpoints and MCP integration Business tools: invoice generator, password generator, calculators	Accurate planetary positions checked against Swiss Ephemeris within an arc-minute 34,000 birth places with historical time zones Big Three calculator for Sun, Moon and rising signs Rising sign calculator with planetary house system Saturn return calculator Black Moon Lilith calculator Nakshatra calculator for Vedic astrology 2027 sky forecast with Mercury retrograde and eclipse dates All 12 houses explanations Free weekly astrology email by Sun sign
What makes it different	All tools are completely free with no signup required Zero data retention: files stay private and never leave your device Over 500 tools across 20+ categories Most tools run in browser without uploading files Progressive Web App with offline capability	No jargon or mystical fog Honest explanations without flattery Verified against Swiss Ephemeris for accuracy Everyday examples in plain language No sign-up required for basic calculator
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)	21 −1 (down) since last check	30 +4 (up) since last check
Trust Flow (Majestic)	9	1
Citation Flow (Majestic)	16	17
Referring domains (Majestic)	4	5

5 details filled in for both companies.

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