DOUBLE-BLIND COMPATIBILITY CHECK
Spot relationship dealbreakers early.
Without revealing your private answers.
A dual "red flag" test designed for mutual privacy. Mark what you can't accept in a partner and your own realities, and get an instant All-Clear or Red Flag result with zero answers exposed unless you both agree to a reveal.
Checklist length is fixed once your session starts. End & wipe to choose another mode.
Dealbreakers
Choose up to 10 dealbreakers in Quick 15, or 20 in Thorough 50.
Your reality
Privately mark what's true about you: habits, plans, history.
One signal
Green if you're all-clear. Red if it's no-go. No details, no judgment.
Optional reveal
Only if you both request it, see what got flagged. Then delete it all.
PASS 2 OF 2 · PICK DEALBREAKERS → MARK YOUR REALITY → SEND PIN FOR ALL-CLEAR
What's true about you
Check all boxes that apply to you (your partner never sees this list).
PASS 1 OF 2 · PICK DEALBREAKERS → MARK YOUR REALITY → SEND PIN FOR ALL-CLEAR
What you can't accept
Check up to 20 dealbreakers below. Tip: You don't need to read all 8 categories; just open the 2 or 3 categories that matter most to you and submit.
Selection cap prevents ticking everything to fish for a partner's private answers.
Complete both checklists for free. Once both partners finish, one $3.99 payment unlocks results for both of you.
Share & wait
Your checklist is locked in.
Waiting for your partner to join and complete their checklist...
Optional invitation
Zero interrogation vibes: when your date opens this link, it's framed as a mutual compatibility check, not a 'red flag test.'
How this works & what happens next
- Double-blind cross-check: We compare your Dealbreakers (Pass 1) against their Reality (Pass 2); and their Dealbreakers against yours; without ever exposing which specific boxes either of you checked.
- How to see your results: Keep this tab open or bookmark your session link (blindflag.com). As soon as your partner finishes their 60-second check, this page automatically updates with your compatibility signal.
Return in this same browser on this device within 24 hours. Your saved local session is required; the link alone cannot recover your answers. Results are unlocked after payment or a valid access code.
You can switch apps or return in this same browser within 24 hours. Your answers and keys stay in local browser storage on this device, never sent in plaintext to the server. They are cleared on completion, on the next load after expiry, or when you end and wipe your session. Server restarts or clearing browser data can still end your session.
Bonus: Unlocking your results here ($3.99) also includes a free 2-for-1 pass for our couples intimacy matcher, BlindDesires.com.
Your side is locked in! Let your partner know you've finished so they can unlock the results on their screen, or unlock the results for both of you right now for $3.99.
RESULTS READY
Both checklists are locked in.
Your private comparison is complete. Unlock your results to see if you're All-Clear (No Dealbreakers) or if a Red Flag (Dealbreaker) was found.
2-for-1 Pass: Unlocking here also includes a free unlock for our couples intimacy matcher, BlindDesires.com.
One payment unlocks results for both partners. Checkout opens in a new tab. Return in this same browser to resume using your device-local answers and keys. Sessions expire after 24 hours; server restarts can still end them.
Open secure checkoutHave a promo/demo code?
Result
Mutual reveal
Where you clashed
You both agreed to see this. It's up to you to talk about it, accept it, or walk away.
Your session is open in another tab.
Your session has not ended. Continue in your original tab, or close it and reload here to resume safely. You can still browse the homepage.
Session ended.
The session is no longer available. This app has cleared its local answers, keys, and token. Copies saved by a participant cannot be deleted remotely.