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Measured on six things

Free birth charts and astrology calculators with plain-language explanations and optional AI-written personal readings.

Growth

A real problem (astrology jargon) with a clear 'plain language' wedge and free calculators. Differentiated from Co-Star and Astro-Seek, but the category is crowded and monetization is thin.

Screenshots

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PlainAstro

About this app

PlainAstro offers free birth charts and astrology calculators with plain-language explanations. Explore Sun, Moon and rising signs, planets, houses and aspects without signing up. Tools include Big Three, Moon sign, rising sign, Saturn return, Lilith and Nakshatra calculators. Optional $12 one-time AI-written personal readings explain the chart and next 12 months. Operated by ULA SOFT LTD. For reflection and entertainment.

Key features

1Free birth chart calculator with Sun, Moon, rising signs, planets, houses, and aspects — no sign-up required.
2Popular free calculators: Big Three, Moon sign, Rising sign, Saturn Return, Lilith, Nakshatra.
3Optional $12 one-time AI-written personal reading covering the chart and next 12 months.

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

People exploring their birth chart

Pain points

Want clear explanations of astrology placements

Primary needs

Birth chart calculators and plain-language interpretations

Demographic

Astrology enthusiasts

Pain points

Want clear explanations of astrology placements

Primary needs

Birth chart calculators and plain-language interpretations

Demographic

People seeking a written astrology reading

Pain points

Want clear explanations of astrology placements

Primary needs

Birth chart calculators and plain-language interpretations

Scout Review

Written by AI from measured evidence, scored out of 100.

PlainAstro is a fast, clean, no-sign-up astrology calculator that delivers on its 'plain words' promise better than most. The free tools are genuinely useful and the $12 reading is a low-risk upsell. Security and accessibility are solid but not exceptional, and the growth story depends on converting free users to one-time purchases in a crowded market.

Measure by measure

Usability

Calculator is front and center, no sign-up required, and free tools are clearly listed. Paid reading is a simple $12 one-time purchase. Onboarding is frictionless for the free tier.

Design

Clean, modern landing page with a clear hero and calculator form. Typography and spacing are consistent, though branding is minimal. No app store presence; website is the product interface.

Speed

Lighthouse mobile performance 98/100 (LCP 1.5s, CLS 0, TBT 156ms) and desktop 100/100. The site is fast and lightweight, with no reported lag complaints.

Security

HTTPS enforced with HSTS, frame protection, and secure cookies. Missing CSP, Permissions-Policy, SPF, and DMARC. No public SOC 2 or security page, but basics are in place.

Accessibility

Lighthouse accessibility 98/100 with one heading-order issue. No WCAG statement or multi-language support found, but the site is responsive and keyboard-friendly in basic checks.

Growth

A real problem (astrology jargon) with a clear 'plain language' wedge and free calculators. Differentiated from Co-Star and Astro-Seek, but the category is crowded and monetization is thin.

Improvement areas

No sample reading or preview before purchase.
Missing security headers (CSP, Permissions-Policy) and email authentication (SPF, DMARC).
Heading-order accessibility issue and no WCAG statement.

Design & Usability

PlainAstro's design is clean and functional, with a prominent birth chart calculator that requires no sign-up. The layout is modern and the typography is readable, though the branding is minimal. Usability is strong for the free tier: you can get your Big Three, Moon sign, and rising sign in seconds. The paid $12 reading is a straightforward one-time purchase. The main usability gap is the lack of a demo or sample reading to preview what you're buying.

Speed & Security

Speed is excellent: Lighthouse mobile 98/100 and desktop 100/100, with LCP 1.5s and zero CLS. The site is lightweight and snappy. Security is decent but not hardened: HTTPS with HSTS, frame protection, and secure cookies are present, but CSP, Permissions-Policy, SPF, and DMARC are missing. There's no public security page or SOC 2, which is typical for a new indie site but leaves room for improvement.

Accessibility & Growth

Accessibility scores 98/100 on Lighthouse, with only a heading-order issue. There's no WCAG statement or multi-language support, but the site is responsive and keyboard-friendly. Growth potential is moderate: the 'plain language' positioning is a real differentiator against jargon-heavy competitors like Astro-Seek, and the free calculators are a smart acquisition hook. However, the category is crowded and the $12 one-time reading is a thin monetization model compared to subscription-based peers.

Conclusion

If you want your birth chart explained without a side of mystical fog or a mandatory account, PlainAstro is a solid pick. It won't replace a human astrologer, but for $12 and zero friction, it's a fair trade.

Suggestions for improvement

Add a sample reading or preview so users know what the $12 report looks like before buying.
Publish a security page with CSP, DMARC, and SPF to harden email and browser security.
Fix the heading-order accessibility issue and add a WCAG statement.
Consider a subscription tier for weekly forecasts to improve recurring revenue.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	PlainAstro	Co-Star	Astro-Seek	Cafe Astrology
Free birth chart calculator	Yes, no sign-up required	Yes, requires app download	Yes, extensive free calculators	Yes, free charts and interpretations
Plain-language interpretations	Core focus, no jargon	Modern, conversational tone	Technical, detailed	Detailed but sometimes dense
Paid reading option	$12 one-time AI-written reading	Free with optional in-app purchases	Free with ads, premium options	Free content, some paid reports
Mobile app	Web only	iOS and Android apps	Web only, mobile-friendly	Web only