cosskill

do you give feedback after the rehearsal, like which line landed and which one lost the other side? being able to replay the exact moment it went sideways is where i'd learn the most.

Your app's name has a negative connotation in Persian. That said, it’s really cool; it’s a great idea—especially for someone like me who might have a lot of job interviews—and the tool itself is very practical.

cosskill lets you rehearse high-stakes conversations — salary negotiations, performance feedback, difficult personal talks — with realistic AI personas before they happen. Free to try: 3 messages without sign-up, 10 after sign-in, all personas and scenarios included. Feedback welcome.

Rehearsing a salary negotiation against a realistic persona before the real talk is a strong use case - the failure cost of practicing is zero. How do the personas push back when someone gives a weak answer? That adversarial layer is where practice tools usually fall flat.

Such a smart use of AI. Being able to rehearse a difficult conversation before the real one sounds genuinely useful.

Letting people practice without signing up (3 free messages) is a smart onboarding move — you get to feel the persona quality before committing. I'm curious how the personas handle real pushback, since salary negotiations usually involve the other side saying no first. A difficulty setting for how adversarial the persona gets would be a genuinely useful addition.

Practicing realistic salary and feedback conversations before the real moment is a useful way to turn anxiety into preparation. Can users customize the persona’s communication style or difficulty as they improve?

Rehearsing difficult conversations with realistic personas is a compelling use case because it lets people practice the wording and pressure before the real moment. A difficulty or pushback setting could make the practice even more useful as confidence grows.

Practicing without sign-up (3 free messages) is a smart onboarding move — you feel the value before committing to anything. One thing I'd watch: AI roleplay personas tend to be agreeable by default, but the real value in salary negotiation rehearsal comes from realistic pushback. If the persona can calibrate its resistance based on the scenario, that's your differentiator. Congrats on the launch!

Great app with clean design.

Maker update: thanks for all the questions and feedback since our launch here. To answer a few inline — the personas play the other side live in the chat, so you feel which answers hold up while the conversation happens; that's why we built a simulator rather than another advice blog. New this month: a Chinese-language interface is live, and the Pro plan ($12.90/mo, or $9.90/mo billed yearly at $118.80) removes the message limits. The free tier stays free — 3 messages without an account, 10 after signing in, all personas and scenarios included. Keep the feedback coming, and try it at https://cosskill.com

Maker update: thanks for all the feedback and questions since our last update. Answering a few inline — the personas play the other side live and push back on weak answers in the chat, so you feel which lines hold up as it happens. Two things shipped this month: the Chinese-language interface is now fully live across the product, and the free tier now resets daily — signed-in free accounts get 10 messages every day (guests still get 3 to try it). Pro stays $12.90/mo, or $9.90/mo billed yearly. Try it at https://cosskill.com