Cycling through all six. Tap any point to stop.

Measured on six things

See who your crush, your ex or any public Instagram or TikTok account just followed.

Security

HTTPS enforced and secure cookies set, but the probe found no HSTS, CSP, frame protection, Referrer-Policy, Permissions-Policy, SPF or DMARC — 3/13 checklist points. Stripe handles payments and no social login is requested, but no audit or security page is published.

Screenshots

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Red Flag Follows

About this app

Red Flag Follows (redflagfollows.app) shows the accounts a public Instagram or TikTok profile followed most recently, newest first. Use it to check the new follows of a partner, an ex or a crush, a competitor, or a creator you love. Their latest follows are sorted into women, men and pages, so new names stand out. Turn on alerts to get an email when they follow someone new. It only uses public data, never asks for a login or password, and the account you check is never told.

Key features

1See a public Instagram or TikTok account's most recent follows, newest first (up to ~200 on Instagram, ~100 on TikTok).
2Follows grouped into Women, Men and Others, with a free preview showing counts before you pay.
3Email alerts when a watched account follows someone new, checked every 2 hours, plus manual 'check again' once an hour.
4No Instagram or TikTok login required; the checked account is never notified and searches are not shared.

Target customer profile

Drawn from the product itself, not from a survey.

Scout Review

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

Red Flag Follows does one thing and does it clearly: type a public Instagram or TikTok username, see the most recent follows newest-first, grouped into women, men and others, with optional email alerts. The landing page is polished, the flow is one field, and the privacy story is unusually well explained — no login, no password, the checked account is never notified. The pricing is the friction: $7.99 per week for the full list after a free count preview, which is a lot for a check most people will run once or twice. Security headers are thin (3/13) and mobile LCP is 4.3s, but accessibility is strong at 96/100 and the design holds up. It's a competent, well-positioned tool with a real emotional hook and a business model that will test how often curiosity repeats.

Measure by measure

Usability

One-field check flow and a free count preview make the core job obvious, and the FAQ answers billing, privacy and private-profile cases. No example username in the form, tiny sign-in link, and the full list sits behind $7.99/week.

Design

Dark, confident landing page with a big hero, clear Instagram/TikTok toggle and mockup cards that show the actual output. Docked for a 10-question FAQ accordion with no dividers and a dense, repetitive four-column footer.

Speed

Lighthouse desktop 95/100 and mobile 78/100, with CLS at 0.001 and TBT 182ms. Mobile LCP of 4.3s is the weak spot, above the 2.5s good threshold, but the page is light and there are no lag complaints in the evidence.

Security

Accessibility

Lighthouse accessibility 96/100 with one failing audit: insufficient background/foreground color contrast. Dark theme, gradient CTAs and no published accessibility statement or WCAG claim; no multi-language support found.

Growth

A real, specific job — checking who a public account followed most recently — with a clear wedge: no login, anonymity from the checked account, gender grouping and email alerts. Early domain (registered 2026-09-29) is context, not the score.

Improvement areas

Security headers: add HSTS, CSP, X-Content-Type-Options, Referrer-Policy and Permissions-Policy, plus SPF/DMARC for alert emails.
Mobile performance: LCP is 4.3s; compress hero assets, preload fonts and defer non-critical scripts to get under 2.5s.
Pricing: $7.99/week is steep for a check most users run once; add an annual or one-off option to reduce churn.
Onboarding: add an example username and recent-search chips to the hero form, and make sign-in/account creation more visible.

Design & Usability

The homepage does the hard part well: a dark, high-contrast hero with an oversized headline, an Instagram/TikTok segmented control and one input, plus right-rail mockups that show exactly what you get — follow lists with gender pills and handles. The visual audit called it 'good', and the hierarchy genuinely earns that. Usability follows the same logic: one field, a free count preview, and an FAQ that actually answers the awkward questions (private profiles, billing, whether the other person is told). Where it slips is the details. The form gives no example username, so a first-time visitor has to guess the format. The sign-in link is a tiny top-right afterthought with no visible account-creation path in the hero. The FAQ runs ten questions in one undivided accordion, and the footer stacks four columns of near-duplicate links. None of that is fatal, but it's the difference between a page that converts and a page that merely looks like it should.

Speed & Security

Speed is a split verdict. Lighthouse desktop scores 95/100 and CLS is a near-perfect 0.001, so the page is stable and light. Mobile is the problem: 78/100 with an LCP of 4.3 seconds, well past the 2.5-second 'good' threshold, and TBT of 182ms. For a marketing page with one form, that mobile LCP is the number to fix first. Security is the weakest dimension. HTTPS is enforced and cookies are secure, but the probe found no HSTS, no CSP, no frame protection, no Referrer-Policy, no Permissions-Policy, and no SPF or DMARC — 3 of 13 checklist points. The site's own FAQ is actually good on data handling: Stripe handles payments, no Instagram or TikTok login is ever requested, searches aren't shared with the account you look up. But there's no security page, no audit, no bug bounty. For a product whose entire pitch is 'we look at public data and never tell them', the missing email authentication records are an odd place to be casual.

Accessibility & Growth

Accessibility scores 96/100 on Lighthouse with exactly one failing audit: insufficient background/foreground color contrast. That's a good result, and the dark theme with pink gradient CTAs is the likely culprit — fixable with a shade or two. Beyond the automated checks there's no accessibility statement, no WCAG conformance claim and no multi-language support, so the 96 is a floor, not a ceiling. Growth is a judgement on the idea, and the idea is sharper than most. The job is specific and emotionally loaded — who did this public account follow most recently — and the wedge is concrete: no login, the checked account is never told, follows are grouped into women/men/others, and subscribers get email alerts every two hours. That's a real product, not a wrapper. The limits are equally real: $7.99 per week is a steep recurring price for a curiosity check, the category is crowded with follower-trackers, and the whole thing depends on a data source Instagram has already changed once. It can grow, but it's a feature-shaped business unless the alerts become the habit.

Conclusion

If you're going to build a tool for the 2am scroll, this is how to do it: honest about what it reads, explicit that the other person never finds out, and blunt that private profiles are off limits. The free count preview is the right hook, and the FAQ answers the questions people are too embarrassed to ask. What it needs next is a reason to stay subscribed past week one — better alerts, history, or a cheaper annual tier — and a security pass that adds HSTS, CSP and DMARC. The idea is good. The execution is close. The pricing is the thing standing between it and a habit.

Suggestions for improvement

Add an example username and recent-search chips to the hero form so first-time visitors know the expected format.
Fix mobile LCP (4.3s): compress hero images, preload the main font, and defer non-critical scripts.
Ship the missing security headers — HSTS, CSP, X-Content-Type-Options, Referrer-Policy — and add SPF/DMARC for the alert emails.
Offer a cheaper annual or one-off tier; $7.99/week is a hard sell for a check most users run once.

How we score

Alternatives comparison

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

	Red Flag Follows
Price to see the full follow list	$7.99/week subscription; free preview shows counts only	Not provided in App Details
Requires the target's or your social login	No login required for either party; public data only	Not provided in App Details
New-follow alerts	Email alerts for one watched account, checked every 2 hours	Not provided in App Details
Follow grouping / sorting	Newest first, grouped into Women, Men and Others	Not provided in App Details
Platform coverage	Public Instagram and TikTok profiles	Not provided in App Details